JP7683303B2 - CONTROL DEVICE, MACHINE SYSTEM, AND PROGRAM - Google Patents

Description

This disclosure relates to a control device, a machining system, and a program.

The machining system described in Patent Document 1 includes a machine tool that processes a workpiece, a control device that controls the operation of the machine tool, and a transport device (referred to as "robot" in the text) that loads and unloads the workpiece into and from the machine tool. In this machining system, an operator operates the operation unit while viewing the image displayed on the display unit, thereby inputting commands or data required for loading and unloading the workpiece into the transport device.

JP 2019-067153 A

If an abnormality occurs, such as a problem with the equipment that constitutes the transport device or an error in the control program of the transport device, the transport device will issue an alarm. However, it takes a long time to manually check alarm information, such as the cause of the alarm and how to reset the alarm.

The objective of this disclosure is to provide a control device, machining system, and program that can easily grasp alarm information related to an alarm on a transport device.

The control device according to the present disclosure is a control device for controlling the operation of a machine tool having a display unit, characterized in that it comprises a first memory unit that stores identification information for identifying an alarm related to a transport device that transports workpieces to and from the machine tool in association with first alarm information that contributes to canceling the alarm, a reception unit that receives the identification information from the transport device, and a display control unit that controls the display unit to display the first alarm information stored in the first memory unit in association with the identification information received by the reception unit.

In the present disclosure, the receiving unit receives the identification information from the transport device.
The first storage unit stores identification information for identifying an alarm related to the transport device and first alarm information in association with each other. The first alarm information is information that contributes to canceling an alarm related to the transport device, such as a cause of the alarm and a method of canceling the alarm.

The display control unit controls the display unit to display the first alarm information stored in the first memory unit in association with the identification information received by the receiving unit, and the display unit displays the first alarm information.
The operator looks at the first alarm information displayed on the display unit. Since the operator does not need to manually check the first alarm information based on the identification information, the operator can easily grasp the alarm information of the alarm related to the machine tool.

The control device according to the present disclosure further includes a second storage unit that stores second alarm information that contributes to canceling an alarm related to the machine tool, and a priority determination unit that determines the priority of each alarm when there are multiple alarms related to the conveying device and the machine tool, and the display control unit controls the display unit to display the first or second alarm information of the alarm with the highest priority based on the determination result of the priority determination unit.

In the present disclosure, the second storage unit stores second alarm information. The second alarm information is information that contributes to canceling an alarm related to the machine tool.
When there are a plurality of alarms related to the transport device and the machine tool, the priority order determination unit determines the priority order of each alarm.

The display control unit controls the display unit to display alarm information that contributes to canceling the alarm with the highest priority based on the result of the determination by the priority determination unit. As a result, if the alarm related to the transport device has the highest priority, the display unit displays the first alarm information stored in the first storage unit. On the other hand, if the alarm related to the machine tool has the highest priority, the display unit displays the second alarm information stored in the second storage unit.
The worker looks at the alarm information displayed on the display unit. Since the worker does not need to determine the priority of the alarms, the worker can easily grasp the alarm information of the alarm with the highest priority.

The control device according to the present disclosure is characterized in that, when there are a total of multiple alarms related to the transport device and the machine tool, the display control unit controls the display unit to display the first or second alarm information of the most recent alarm for a predetermined period of time, and then displays the first or second alarm information of the alarm with the highest priority.

In the present disclosure, when there are a total of multiple alarms related to the transport device and multiple alarms related to the machine tool, the display unit displays the alarm information of the most recent alarm for a predetermined period of time. After that, the display unit displays the alarm information of the alarm with the highest priority. Therefore, the worker can easily grasp the alarm information of the alarm with the highest priority while grasping the alarm information of the most recent alarm.

The control device according to the present disclosure is characterized in that, if the identification information received by the reception unit is not stored in the first storage unit, the display control unit controls the display unit to display a predetermined message.

In the present disclosure, when the identification information accepted by the accepting unit is not stored in the first storage unit, the display unit displays a predetermined message.
For example, if the transport device is upgraded but the contents stored in the first storage unit are not updated, the identification information received by the reception unit may not be stored in the first storage unit. However, since the display unit displays a predetermined message, the operator can at least understand that the transport device has issued an alarm.

The control device according to the present disclosure further includes a determination unit that determines whether or not to store an alarm history related to the transport device, and a history storage unit that, when the determination unit determines that the alarm history should be stored, stores the identification information received by the reception unit in association with information indicating the timing at which the reception unit received the identification information.

In the present disclosure, the determination unit determines whether or not to store the alarm history of the transport device.
When the determination unit determines that the alarm history is to be stored, the history storage unit stores the identification information received by the reception unit in association with information indicating the timing at which the reception unit received the identification information.

The identification information stored in the history memory unit can be arranged in chronological order based on the timing of storage in the history memory unit. Alarm information can be obtained by searching the contents stored in the first memory unit based on the identification information stored in the history memory unit or by consulting the manual. As a result of the above, alarms related to the transport device can be identified in chronological order.

The machining system according to the present disclosure has a machine tool equipped with a display unit, a control device that controls the operation of the machine tool, and a transport device that loads and unloads workpieces onto and from the machine tool, and has a first memory unit that stores identification information that identifies an alarm related to the transport device and first alarm information that contributes to canceling the alarm in association with each other, and the control device has a reception unit that receives the identification information from the transport device, and a display control unit that controls the display unit to display the first alarm information stored in the first memory unit in association with the identification information received by the reception unit.

In the present disclosure, the control device includes a reception unit and a display control unit, and by using the first memory unit, alarm information for alarms related to the transport device can be easily grasped.

The program disclosed herein is a program executable by a control device that controls the operation of a machine tool, and receives, from a transport device that loads and unloads workpieces to and from the machine tool, identification information that identifies an alarm related to the transport device, obtains the first alarm information corresponding to the received identification information from a first memory unit that stores the identification information in association with first alarm information that contributes to canceling the alarm, and causes the control device to execute a process of displaying the obtained first alarm information.

In this disclosure, the control device executes the program according to this disclosure, making it possible to easily grasp alarm information for alarms related to the transport device.

The control device, machining system, and program disclosed herein make it easy to grasp alarm information for alarms related to the transport device.

1 is a perspective view illustrating a machining system according to an embodiment of the present invention; FIG. 2 is a front cross-sectional view illustrating the machining system. FIG. 2 is a block diagram showing the configuration of a control system of the machining system. 4 is a block diagram showing the configuration of a control system related to the display of alarm information. FIG. 4 is a schematic diagram showing an example of data stored in an ID storage unit; FIG. 10 is a flowchart showing a procedure of an alarm issuing process executed by the transport device. 4 is a schematic diagram illustrating an example of data stored in a first memory unit; FIG. 4 is a schematic diagram showing an example of data stored in a second storage unit; FIG. 4 is a schematic diagram showing an example of data stored in an alarm storage unit; FIG. FIG. 4 is a schematic diagram illustrating an example of data stored in a history storage unit. 10 is a flowchart showing the procedure of a first alarm storage process executed by the control device. 10 is a flowchart showing the procedure of a second alarm storage process executed by the control device. 10 is a flowchart showing a procedure of a priority adjustment process executed by the control device. FIG. 13 is a schematic diagram showing an example of a data table for adjusting priority levels; 10 is a flowchart showing a procedure of a display process executed by the control device. 10 is a flowchart showing a procedure of a display process executed by the control device. 10 is a flowchart showing a procedure of a display process executed by the control device. FIG. 4 is a schematic diagram showing an example of the latest alarm displayed on the display unit. FIG. 13 is a schematic diagram showing an example of a top-priority alarm displayed on a display unit. 11 is a schematic diagram showing an example of an unregistered alarm displayed on a display unit; FIG.

The following describes an embodiment of the present disclosure. In the following description, the up/down, front/back, and left/right directions are indicated by arrows in the figures.

FIG. 1 is a perspective view illustrating a machining system according to an embodiment of the present invention.
In the figure, reference numeral 1 denotes a machining system, which includes a machine tool 2, a transport device 3, and a control device 4.
The machine tool 2 includes a base 21. The base 21 is placed on the floor. The machine tool 2 machines a workpiece 5 (see FIG. 2, which will be described later) above the base 21.
The base 21 supports a cover 22. The cover 22 covers the machine tool 2 from the front, rear, left and right sides.

A front opening 221 is provided on the front surface of the cover 22. The cover 22 is provided with a front door 222, which covers the front opening 221 in an openable and closable manner. When the front opening 221 is open, an operator can enter the cover 22 from the outside to the inside through the front opening 221.

A side opening 223 is provided on the right side of the cover 22. The cover 22 has a side door 224 that opens and closes the side opening 223. When the side opening 223 is open, an arm 34 of the conveying device 3, which will be described later, can enter the inside of the cover 22 from the outside of the cover 22 through the side opening 223.

Door opening/closing detection units 225, 226 are provided on the inner surface of the cover 22. The door opening/closing detection unit 225 detects whether the front door 222 is open or closed. The door opening/closing detection unit 226 detects whether the side door 224 is open or closed. The door opening/closing detection unit 225 provides the detection result to the transport device 3 and the control device 4, and the door opening/closing detection unit 226 provides the detection result to the control device 4 (see FIG. 3 described later).
There are no limitations on the configuration of each of the door opening/closing detection units 225 and 226. For example, the door opening/closing detection unit 225 includes a limit switch provided on the periphery of the front opening 221 and a dog provided on the edge of the front door 222 that turns on the limit switch when the front door 222 is opened and turns off the limit switch when the front door 222 is closed.

A display unit 23 and an operation unit 24 are provided on the right side of the front door 222 on the outer surface of the cover 22. The display unit 23 displays images. The operation unit 24 has a plurality of operation keys 241. An operator operates the operation keys 241 of the operation unit 24 while watching the image displayed by the display unit 23, thereby inputting commands or data, etc. required for machining the workpiece 5 to the control device 4. In the same manner, the operator inputs commands or data, etc. required for loading and unloading the workpiece 5 to the conveying device 3 via the control device 4.
The operation unit 24 has a power key 242 and a reset key 243 (see FIG. 4 described later). The operator operates the power key 242 to turn on/off the power of the machining system 1. The operator operates the reset key 243 to reset the machining system 1.

FIG. 2 is a front cross-sectional view illustrating the machining system 1. As shown in FIG.
The machine tool 2 includes a table 25. The table 25 is provided on the upper part of the base 21. A jig 251 is provided on the upper surface of the table 25. The jig 251 holds the workpiece 5 placed on the table 25 by an arm 34, which will be described later.
The machine tool 2 includes a spindle 26. The spindle 26 extends in the vertical direction. The lower end of the spindle 26 holds a tool 11. The tool 11 held by the spindle 26 is rotated about a rotation axis extending in the vertical direction by a spindle motor 261 provided above the spindle 26.

The table 25 can move in the X-axis, Y-axis, and Z-axis directions relative to the main shaft 26. For example, the table 25 is arranged so that it can move in the X-axis and Y-axis directions, and the main shaft 26 is arranged so that it can move in the Z-axis direction. Here, the X-axis, Y-axis, and Z-axis directions are parallel to the left-right direction, the front-back direction, and the up-down direction.

The machine tool 2 includes a turret-type tool magazine 27. The tool magazine 27 rotatably holds a plurality of tools 11. The spindle 26 moves in the Z-axis direction relative to the tool magazine 27.
The machine tool 2 machines an unmachined workpiece 5 held by a jig 251 on a table 25 with a tool 11 held by a spindle 26 .

1 and 2, the transfer device 3 is located on the right side of the machine tool 2. The transfer device 3 has a base 31. The base 31 is provided on the base 21 of the machine tool 2.
A box-shaped running body 32 (see FIG. 1) is provided on the base 31. The base 31 supports the running body 32 so that the running body 32 can reciprocate in the front-rear direction.
A support portion 33 is provided on the running body 32. The support portion 33 extends upward from the upper portion of the running body 32. The support portion 33 supports an arm 34.

The arm 34 comprises a first arm 341, a second arm 342, and a hand 343. The base end of the first arm 341 is connected to the upper end of the support part 33, and the first arm 341 can swing around a pivot (not shown) extending in the front-rear direction. The base end of the second arm 342 is connected to the tip of the first arm 341, and the second arm 342 can swing around a pivot (not shown) extending in the front-rear direction. The base end of the hand 343 is connected to the upper end of the second arm 342, and the hand 343 can swing around a pivot (not shown) extending in the front-rear direction. The hand 343 can grip two workpieces 5 individually.

The workpiece placement table 12 and the safety fence 13 are fixed near the transport device 3 .
The workpiece placement table 12 is adjacent to the right side of the transport device 3. A workpiece 5 is placed on the workpiece placement table 12. A safety fence 13 surrounds the workpiece placement table 12 and the transport device 3. The safety fence 13 prevents an operator from coming into contact with the transport device 3 while it is in operation. An operator opens the safety fence 13 to place an unmachined workpiece on the workpiece placement table 12 and remove a machined workpiece placed on the workpiece placement table 12. A fence opening/closing detection unit 131 that detects whether the safety fence 13 is open or closed is provided on the safety fence 13. The fence opening/closing detection unit 131 provides the detection result to the transport device 3 (see FIG. 3 described later).

FIG. 3 is a block diagram showing the configuration of a control system of the machining system 1.
The machine tool 2 is equipped with door opening/closing detectors 225 , 226 and a spindle motor 261 , as well as an X-axis motor 252 , a Y-axis motor 253 , an air brake 255 , a Z-axis motor 262 , and a magazine motor 271 .

The X-axis motor 252 moves the table 25 in the X-axis direction. The Y-axis motor 253 moves the table 25 in the Y-axis direction. The air brake 255 brakes the table 25 and maintains the position of the table 25.

For proper braking by the air brakes 255, the pressure of the air used by the air brakes 255 must be equal to or higher than a specified minimum pressure. The air brakes 255 have a pressure detection unit (not shown) and provide the detection result of the pressure of the air used by the air brakes 255 to the control device 4.

The Z-axis motor 262 moves the spindle 26 in the Z-axis direction.
The magazine motor 271 rotates the multiple tools 11 held in the tool magazine 27. The rotational movement of the tools 11 stops when a specific tool 11 reaches the tool change position. The tool 11 at the tool change position is transferred from the tool magazine 27 to the spindle 26 while the spindle 26 is lowered by the Z-axis motor 262. The spindle 26 holds the tool 11 received from the tool magazine 27.

The tool 11 held by the spindle 26 is rotated by the spindle motor 261 and comes into contact with the workpiece 5 held by the jig 251 on the table 25 , thereby machining the workpiece 5 .
The machine tool 2 includes a coolant supply unit 28. The coolant supply unit 28 supplies coolant to the tool 11 and the workpiece 5 for cooling the tool 11 and the workpiece 5 during machining and for washing away cutting chips generated by machining.

For proper cooling by the cooling liquid supply unit 28, the temperature of the cooling liquid used by the cooling liquid supply unit 28 must be equal to or lower than a predetermined maximum temperature. The cooling liquid supply unit 28 has a temperature detection unit (not shown) and provides the detection result of the temperature of the cooling liquid used by the cooling liquid supply unit 28 to the conveying device 3 and the control device 4.

After the machining is completed, the rotation of the tool 11 held by the spindle 26 stops. The Z-axis motor 262 raises the spindle 26, and the tool 11 held by the spindle 26 moves away from the workpiece 5. The tool 11 held by the spindle 26 is transferred from the spindle 26 to the tool magazine 27 while the spindle 26 is rising. The tool magazine 27 holds the tool 11 received from the spindle 26.
As the table 25 moves to the right, the machined workpiece 5 moves to the workpiece transfer position.

The conveying device 3 is equipped with a travel motor 321 and an arm drive unit 344. The travel motor 321 causes the travel body 32 to travel in the forward and backward directions. The support unit 33 and the arm 34 travel back and forth in the forward and backward directions together with the travel body 32.

The arm drive unit 344 is a collective term for a motor for swinging the first arm 341, a motor for swinging the second arm 342, a motor for swinging the hand 343, and an actuator for the hand 343 to grip a workpiece.
The initial position of the first arm 341 is a position where its tip portion faces upward, and the initial position of the second arm 342 is a position where its tip portion faces downward (see FIG. 1).
The arm 34 extends and retracts in the left and right directions due to the arm drive unit 344 .

The control device 4 is located at the rear of the machine tool 2 (see Figure 1). The control device 4 is equipped with a power supply unit 41. The power supply unit 41 supplies power to the X-axis motor 252, Y-axis motor 253, spindle motor 261, Z-axis motor 262, and magazine motor 271 of the machine tool 2, as well as to the travel motor 321 and arm drive unit 344 of the transport device 3. When the power supply unit 41 is off, none of these motors and actuators operate.

The operator closes the front door 222 and the safety fence 13 before starting operation of the machining system 1.

The transport device 3 transports the unmachined workpiece 5 into the machine tool 2 and transports the machined workpiece 5 out of the machine tool 2. To do this, first, the arm 34 is extended to the right by the arm drive unit 344 and grasps the unmachined workpiece 5 placed on the workpiece placement table 12. After grasping the workpiece 5, the arm 34 retracts to the left and returns to the initial position.

The travel motor 321 causes the travel body 32 to travel, and the arm 34 and the table 25 at the work transfer position are stopped at a position where they face each other through the side opening 223 .
The arm 34 extends leftward and enters inside the cover 22 through the side opening 223 (see FIG. 2). The arm 34 that enters inside the cover 22 grips the machined workpiece 5 and places the unmachined workpiece 5 on the table 25.
After placing the unmachined workpiece 5 on the table 25 , the arm 34 moves out from inside the cover 22 to outside the cover 22 .

The traveling body 32 starts traveling again and stops at a position where the arm 34 faces the workpiece mounting table 12. The arm 34 places the machined workpiece 5 on the workpiece mounting table 12 and then returns to the initial position.
The side door 224 opens before the unmachined workpiece 5 is carried in and closes after the machined workpiece 5 is carried out. There is no limitation on the method of opening and closing the side door 224. For example, the side door 224 is a sliding door, and opens and closes in conjunction with the forward and backward movement of the traveling body 32.

The conveying device 3 improves safety compared to when an operator conveys the workpiece 5 manually.
After the side door 224 is closed, the machine tool 2 starts machining the workpiece 5. Since the front door 222 and the side door 224 are both closed, the cover 22 can prevent cutting chips generated by machining the workpiece 5 from scattering, and can prevent an operator from coming into contact with the machine tool 2 during operation.

FIG. 4 is a block diagram showing the configuration of a control system related to the display of alarm information, which will be described later.
The transport device 3 includes a control unit 35, a main memory unit 36, and an auxiliary memory unit 37, which are interconnected via a bus.

The control unit 35 includes one or more processors such as a CPU, MPU, GPU, etc. The main memory unit 36 is volatile and is, for example, a RAM. The auxiliary memory unit 37 is non-volatile and is, for example, a ROM, flash memory, hard disk, or SSD. The auxiliary memory unit 37 pre-stores a computer program 3P for controlling the operation of the transport device 3, as well as various data required for executing the computer program 3P. A part of the memory area of the auxiliary memory unit 37 is an ID memory unit 371, which will be described later.

The control unit 35 uses the main memory unit 36 as a working area and executes various calculation processes and control processes according to the computer program 3P stored in the auxiliary memory unit 37. For example, the control unit 35 controls the operation of the travel motor 321 and the arm drive unit 344 when loading and unloading the workpiece 5, thereby controlling the operation of the travel body 32 and the arm 34. The control unit 35 determines whether an abnormality has occurred in the machining system 1 (particularly the conveying device 3), and if an abnormality has occurred, issues an alarm as described below. Below, examples of abnormalities that should issue an alarm include the opening of the front door 222 or safety fence 13, overheating of the coolant, an improper command, and the stop of power supply from the power supply unit 41.

When power is being supplied from the power supply unit 41, the control unit 35 determines whether the front door 222 and the safety fence 13 are open or closed. Specifically, the control unit 35 determines whether the front door 222 is open or closed based on the detection result of the door opening/closing detection unit 225, and determines whether the safety fence 13 is open or closed based on the detection result of the fence opening/closing detection unit 131. The control unit 35 controls the travel motor 321 and the arm drive unit 344 to operate when the front door 222 and the safety fence 13 are closed. When the front door 222 or the safety fence 13 is open, the detection results of the door opening/closing detection units 225 and 226 are output to the control unit 35, and the control unit 35 issues an alarm named "Front door or safety fence open". In the following, the alarm named "α" will be referred to as alarm "α". If the front door 222 or safety fence 13 is opened while the travel motor 321 or arm drive unit 344 is operating, the control unit 35 controls the operating travel motor 321 or arm drive unit 344 to stop, and then issues an alarm indicating that the front door or safety fence is open.

Before the travel motor 321 and the arm drive unit 344 start operating, the control unit 35 determines whether the temperature of the coolant is below a predetermined maximum temperature based on the detection result of the temperature detection unit of the coolant supply unit 28. If the temperature of the coolant exceeds the predetermined maximum temperature, the control unit 35 issues an alarm "coolant overheating."

When the operator operates the operation key 241, the power key 242, or the reset key 243 of the operation unit 24, the operation unit 24 sends a signal corresponding to the operation key 241, the power key 242, or the reset key 243 to the control device 4.

When the command input by the operator using the operation unit 24 is a command required for loading and unloading the workpiece 5 , the control device 4 gives the command required for loading and unloading the workpiece 5 to the transport device 3 .
The control unit 35 of the conveying device 3 judges whether the command received via the control device 4 is valid. If the command is invalid, the control unit 35 issues an alarm "invalid command" since the received command cannot be followed.

If power supply from the power supply unit 41 is stopped while the traveling motor 321 or the arm drive unit 344 is operating, the traveling motor 321 or the arm drive unit 344 that is operating will stop. If the traveling motor 321 or the arm drive unit 344 that is operating stops due to the stop of power supply from the power supply unit 41, the control unit 35 will issue an alarm "power supply stopped."

FIG. 5 is a schematic diagram showing an example of data stored in the ID storage unit 371. As shown in FIG.
The ID storage unit 371 stores the name of an alarm, identification information for identifying the alarm (hereinafter referred to as an alarm ID), and the alarm release condition (described later) in association with each other. For example, the alarm name "front door or safety fence open" is associated with the alarm ID "A01" and the alarm release condition "reset." Also, the alarm name "coolant overheat" is associated with the alarm ID "A02" and the alarm release condition "power off."

FIG. 6 is a flowchart showing the procedure of an alarm issuing process executed by the transport device 3.
If at least one of the following abnormalities occurs: the front door 222 or the safety fence 13 is opened, the coolant overheats, an improper command is received, or power supply from the power supply unit 41 is stopped, the control unit 35 interrupts or cancels the ongoing process and then executes an alarm issuance process.
The control unit 35 refers to the ID storage unit 371 to obtain an alarm ID corresponding to the abnormality that has occurred (S11).
The control unit 35 outputs the alarm ID acquired in S11 to the control device 4 (S12).

Conventionally, the display unit 23 of the machine tool 2 may display the alarm ID of an alarm issued by the transport device 3. In this embodiment, the display unit 23 displays alarm information useful for resetting the alarm together with the alarm ID, as described below. The alarm information includes the cause of the alarm and a method for resetting the alarm.
The operator looks at the cause of the alarm and the method of resolving the alarm displayed on the display unit 23, and performs the work to resolve the abnormality, thereby satisfying the alarm cancellation conditions. In this embodiment, the cancellation conditions for the alarm are exemplified by the cancellation condition "power off", the cancellation condition "reset", and the cancellation condition "key operation".

After the process of S12 is completed, the control unit 35 acquires the alarm cancellation conditions stored in the ID storage unit 371 in association with the alarm ID acquired in S11 (S13), and determines whether the worker has satisfied the alarm cancellation conditions (S14). If the worker has not satisfied the alarm cancellation conditions (NO in S14), the control unit 35 returns the process to S14.

The control unit 35 determines that the release condition "power off" is satisfied when the power of the machining system 1 is turned off and then turned on again by operating the power key 242. When the release condition "power off" is satisfied, the control unit 35 determines that the release condition "reset" and the release condition "key operation" are also satisfied.
The control unit 35 determines that the release condition "reset" is satisfied when the machining system 1 is reset by the "power off" operation, which is the release condition of the control unit 35. When the release condition "reset" is satisfied, the control unit 35 determines that the release condition "key operation" is also satisfied.
The control unit 35 determines that the release condition “key operation” is satisfied when the worker operates a predetermined operation key 241. The fact that the worker has operated the predetermined operation key 241 is transmitted from the operation unit 24 to the transport device 3 via the control device 4.

If the operator meets the alarm cancellation conditions (YES in S14), the control unit 35 ends the alarm issuance process. After the alarm issuance process ends, the control unit 35 resumes the process that was interrupted when the abnormality occurred, or starts a new process. In other words, the control unit 35 cancels the alarm.

However, even if the operator meets the alarm cancellation conditions, if the abnormality causing the alarm remains, the control unit 35 determines that an abnormality has occurred and executes the alarm issuing process again. Therefore, the alarm is not cancelled just because the operator meets the alarm cancellation conditions (for example, just operating the reset key 243 without closing the open front door 222).

The data stored in the ID storage unit 371 is not limited to the name of the alarm, the alarm ID, and the alarm cancellation conditions. For example, the ID storage unit 371 may store the priority of the alarm in association with the alarm ID. When multiple alarms are issued simultaneously, the control unit 35 in the process of S12 outputs the alarm IDs of the alarms with the highest priority to the control device 4.

As shown in FIG. 4, the control device 4 includes a control unit 42, a main memory unit 43, an auxiliary memory unit 44, and a clock unit 45, which are interconnected via a bus.

The control unit 42 includes one or more processors such as a CPU, MPU, GPU, etc. The main memory unit 43 is volatile and is, for example, a RAM. The auxiliary memory unit 44 is non-volatile and is, for example, a ROM, flash memory, hard disk, or SSD. The auxiliary memory unit 44 pre-stores a computer program 4P for controlling the operation of the machine tool 2 and the control device 4, as well as various data required for executing the computer program 4P. Part of the memory area of the auxiliary memory unit 44 is a first memory unit 441, a second memory unit 442, an alarm memory unit 443, and a history memory unit 444, which will be described later. The clock unit 45 keeps track of the current date and time.

The control unit 42 uses the main memory unit 43 as a working area, and executes various calculation processes and control processes, etc., according to the computer program 4P stored in the auxiliary memory unit 44. For example, the control unit 42 controls the operation of each part of the machine tool 2 when machining the workpiece 5. The control unit 35 also determines whether an abnormality has occurred in the machining system 1 (particularly the machine tool 2), and if an abnormality has occurred, issues an alarm as described below. The computer program 4P includes the program of this embodiment.

Below, examples of abnormalities that should trigger an alarm include the opening of the front door 222, the opening of the side door 224, low air pressure used by the air brake 255, and overheating of the coolant used by the coolant supply unit 28.

The control unit 42 determines whether the front door 222 is open or closed based on the detection result of the door open/close detection unit 225, and determines whether the side door 224 is open or closed based on the detection result of the door open/close detection unit 226. The control unit 42 turns on the power supply unit 41 when the front door 222 and the side door 224 are closed. When the power supply unit 41 is on and the front door 222 is open, the control unit 42 turns off the power supply unit 41 and issues an alarm "front door open". When the power supply unit 41 is on and the side door 224 is open, the control unit 42 turns off the power supply unit 41 and issues an alarm "side door open".

The control unit 42 determines whether or not the air pressure is equal to or higher than a predetermined minimum pressure based on the detection result of a pressure detection unit provided in the air brake 255. When the power supply unit 41 is on and the air pressure is below the predetermined minimum pressure, the control unit 42 turns off the power supply unit 41 and issues an alarm "low air pressure."
The control unit 42 determines whether the temperature of the coolant is equal to or lower than a predetermined maximum temperature based on the detection result of the temperature detection unit included in the coolant supply unit 28. When the power supply unit 41 is on and the temperature of the coolant exceeds the predetermined maximum temperature, the control unit 42 turns off the power supply unit 41 and issues an alarm "coolant overheating."

Figure 7 is a schematic diagram showing an example of data stored in the first memory unit 441. The first memory unit 441 stores the name of the alarm issued by the transport device 3, the alarm ID, the priority of the alarm, and the alarm cancellation conditions, which are associated with each other. Furthermore, the first memory unit 441 stores information indicating the cause of the alarm, the method of canceling the alarm, and the attributes of the alarm (described later), which are associated with the alarm ID. In this embodiment, the alarm issued by the transport device 3 is an alarm related to the transport device 3. The cause of the alarm and the method of resolving the alarm stored in the first memory unit 441 are first alarm information that contributes to the cancellation of the alarm issued by the transport device 3. Note that the first alarm information may be only the cause of the alarm, or only the method of resolving the alarm, or may be other information.

For example, the alarm name "Front door or safety fence open", alarm ID "A01", alarm priority "5", and alarm release condition "reset" are stored in association with each other. Furthermore, the alarm cause "Front door or safety fence is open", the alarm release method "Close the front door or safety fence before resetting", and the attribute "front door" are stored in association with these. Also, the alarm name "coolant overheating", alarm ID "A02", alarm priority "4", and alarm release condition "power off" are stored in association with each other. Furthermore, the alarm cause "coolant temperature is too high", the alarm release method "Turn off the power and then replace or refill the coolant", and the attribute "coolant" are stored in association with these. Here, the higher the alarm priority, the higher the value, and the higher the priority, the greater the impact on the operation of the machining system.

Figure 8 is a schematic diagram showing an example of data stored in the second memory unit 442. The second memory unit 442 stores the name of the alarm issued by the control device 4, the alarm ID, the priority of the alarm, and the alarm cancellation conditions, which are associated with each other. Furthermore, the second memory unit 442 stores information indicating the cause of the alarm, the method of canceling the alarm that is the cause of the alarm, and the attributes of the alarm (described later), which are associated with the alarm ID. In this embodiment, the alarm issued by the control device 4 is an alarm related to the machine tool 2. The cause of the alarm and the method of resolving the alarm stored in the second memory unit 442 are second alarm information that contributes to the cancellation of the alarm issued by the control device 4. Note that the second alarm information may be only the cause of the alarm, or only the method of resolving the alarm, or may be other information.

For example, the alarm name "front door open", alarm ID "B01", alarm priority "5", and alarm release condition "reset" are stored in association with each other. Furthermore, the alarm cause "front door is open", alarm release method "close the front door and then reset", and attribute "front door" are stored in association with these. Also, the alarm name "side door open", alarm ID "B02", alarm priority "5", and alarm release condition "power off" are stored in association with each other. Furthermore, the alarm cause "side door open", alarm release method "turn off the power and then check the side door opening and closing mechanism", and attribute "side door" are stored in association with these.

The alarm ID contains information to determine whether the alarm ID is for an alarm issued by the transport device 3 or the control device 4.

Figure 9 is a schematic diagram showing an example of data stored in the alarm storage unit 443. The control unit 42 associates the alarm date and time, priority, release conditions, and information indicating the current state with the alarm ID, and writes them to the alarm storage unit 443.

The date and time of the alarm is the current date and time measured by the clock unit 45 at the time when the control unit 42 determines that an abnormality has occurred in the machining system 1. Alternatively, the date and time of the alarm is the current date and time measured by the clock unit 45 at the time when the alarm ID is received from the transport device 3. The priority of the alarm is the priority stored in the first memory unit 441 or the second memory unit 442 in association with the alarm ID. However, the control unit 42 may adjust the priority as described below. The current state of the alarm means whether the alarm information has been displayed or not.

For example, in the alarm memory unit 443, the alarm date and time "March 2nd, 10:00", priority "5", current status "already displayed", and release condition "reset" are stored in association with alarm ID "B01". Also, the alarm date and time "March 2nd, 10:00", priority "5→1", current status "not displayed", and release condition "reset" are stored in association with alarm ID "A01". Here, priority "5→1" indicates that priority "5" has been adjusted to priority "1".

Figure 10 is a schematic diagram showing an example of data stored in the history storage unit 444. The worker operates the operation unit 24 to provide the control device 4 with history necessity information indicating whether or not to keep a history of the alarm. The history necessity information is stored in the auxiliary storage unit 44. Note that the auxiliary storage unit 44 may store default history necessity information. If the history necessity information indicates that the alarm history should be kept, the control unit 42 writes the alarm ID and the date and time of the alarm in association with each other in the history storage unit 444 (see S36 in Figure 12 described later).

The operator may input history necessity information common to all alarms, may input history necessity information for each alarm, or may input separate history necessity information for each alarm issued by the conveying device 3 and the control device 4.

The history memory unit 444 stores the alarm ID and the date and time of the alarm stored in the alarm activation memory unit 443 in association with each other. By searching the first memory unit 441 and the second memory unit 442 based on the alarm ID stored in the history memory unit 444, the name of the alarm, alarm information, etc. can be obtained. By sorting based on the date and time of the alarm stored in the history memory unit 444, the alarms can be arranged in the order in which they were activated.

For example, the alarm date and time "March 2nd, 10:00" is stored in association with alarm ID "B01", and the alarm date and time "March 2nd, 10:01" is stored in association with alarm ID "A01". By searching the first memory unit 441 and the second memory unit 442 based on alarm ID "A01" and alarm ID "B01", it is found that the conveying device 3 issued an alarm "Front door or safety fence open" and that the control device 4 issued an alarm "Front door open". Because the date and time of the alarm "Front door open" and the date and time of the alarm "Front door or safety fence open" are almost the same, it is found that an abnormality occurred at around March 2nd, 10:00, when the front door 222 was open.

The history storage unit 444 stores the date and time of the alarm, "March 1st, 13:31", in association with the alarm ID "A01". This means that the control device 4 did not issue an alarm "front door open", but the transport device 3 issued an alarm "front door or safety fence open". From this, it can be seen that an abnormality occurred, with the safety fence 13 opening, at around 13:31 on March 1st.

Normally, the storage capacity of the auxiliary storage unit 44 of the control device 4 is larger than the storage capacity of the auxiliary storage unit 37 of the transport device 3, so it is reasonable for the control device 4 to have a history storage unit 444. The history storage unit 444 shown in FIG. 10 stores both the data of alarms issued by the transport device 3 and the data of alarms issued by the control device 4, but the history storage unit for the transport device 3 and the history storage unit for the control device 4 may be separate.

The history storage unit 444 may store not only the date and time of the alarm but also various data related to the alarm in association with the alarm ID. The data related to the alarm is, for example, the line of execution of the program that the control unit 35 was executing when the abnormality occurred, or the coordinates of the position where the arm 34 stopped. In this case, the conveying device 3 outputs the data related to the alarm along with the alarm ID to the control device 4. Note that when signals are input/output between the conveying device 3 or the control device 4 and a communication device external to the system, the data related to the alarm may be the signal input/output status when the abnormality occurred.

11 is a flowchart showing the procedure of the first alarm storage process executed by the control device 4. When at least one of the following abnormalities occurs: the front door 222 is open, the side door 224 is open, the air pressure used by the air brake 255 is low, and the coolant used by the coolant supply unit 28 is overheated, the control unit 42 interrupts or stops the process being executed, and then executes the first alarm storage process.
The control unit 42 acquires the date and time when the abnormality occurred from the clock unit 45 (S21). The control unit 42 acquires an alarm ID corresponding to the abnormality that occurred, the priority of the alarm, and a condition for canceling the alarm by referring to the second storage unit 442 (S22).

The control unit 42 associates the date and time obtained in S21 with the alarm ID, alarm priority, alarm cancellation conditions, and the current alarm status of "not displayed" obtained in S22, and writes them to the alarm storage unit 443 (S23), and ends the first alarm storage process.

Figure 12 is a flowchart showing the procedure of the second alarm storage process executed by the control device 4. The control unit 42 executes the second alarm storage process when an alarm ID is input from the transport device 3. The control unit 42 accepts the alarm ID output by the transport device 3 (S31). The control unit 42 in S31 functions as a reception unit in this embodiment. The control unit 42 obtains the date and time when the alarm ID was accepted in S31 from the clock unit 45 (S32).

The control unit 42 searches the first memory unit 441 based on the alarm ID received in S31 (S33). The control unit 42 determines whether the alarm ID received in S31 is stored in the first memory unit 441 (S34), and if it is stored (YES in S34), obtains the priority and cancellation conditions of the alarm associated with the alarm ID (S35).

The control unit 42 associates the alarm ID received in S31, the date and time obtained in S32, the alarm priority and release conditions obtained in S35, and the current alarm status of "not displayed" and writes them to the alarm storage unit 443 (S36), and ends the second alarm storage process.

For example, if the transport device 3 has been upgraded but the contents stored in the first memory unit 441 have not been updated, the first memory unit 441 may not store the alarm ID received in S31. If the first memory unit 441 does not store the alarm ID received in S31 (NO in S34), the control unit 42 sets the alarm priority and release condition to a predetermined priority and release condition (S37) and moves the process to S36. In this case, the control unit 42 in S36 writes the alarm ID received in S31, the date and time acquired in S32, the predetermined priority and release condition, and the current alarm status of "not displayed" in association with each other in the alarm generation memory unit 443.

Here, the predetermined priority is, for example, the lowest priority "1", the predetermined release condition is the loosest release condition "key operation", and these are stored in the first memory unit 441 (see FIG. 7). After the process of S37 is completed, the control unit 42 performs the process of S36, and as shown in FIG. 9, for example, the alarm memory unit 443 stores the alarm date and time "March 2nd, 10:02", the priority "1", the release condition "key operation", and the current state "not displayed" in association with the alarm ID "C99".

FIG. 13 is a flowchart showing the procedure of the priority adjustment process executed by the control device 4.
When the first alarm storage process shown in Fig. 10 or the second alarm storage process shown in Fig. 11 is completed, the control unit 42 executes a priority adjustment process. The control unit 42 judges whether or not a plurality of alarm IDs are stored in the alarm storage unit 443 (S41). When there is only one alarm ID stored in the alarm storage unit 443 (NO in S41), the control unit 42 ends the priority adjustment process.

When multiple alarm IDs are stored in the alarm memory unit 443 (YES in S41), the control unit 42 determines whether or not an alarm ID related to the transport device 3 and an alarm ID related to the control device 4 are mixed based on each alarm ID (S42). When only the alarm ID of the alarm issued by the transport device 3 or only the alarm ID of the alarm issued by the control device 4 is stored in the alarm memory unit 443 (NO in S42), the control unit 42 ends the priority adjustment process.

If the alarm ID of the alarm issued by the transport device 3 and the alarm ID of the alarm issued by the control device 4 are mixed (YES in S42), the control unit 42 adjusts the priority of the alarm issued by the transport device 3 (S43) and ends the priority adjustment process.

Here, the process of S43 will be specifically described.
Since the transport device 3 is a device subordinate to the machine tool 2, it is desirable to give priority to an alarm issued by the control device 4 over an alarm issued by the transport device 3. The simplest process of S43 is to change the priority of alarms issued by the transport device 3 to the lowest priority across the board.

In this embodiment, for the processing of S43, information indicating the attributes of the alarm is associated with each alarm ID stored in the first memory unit 441 and the second memory unit 442. For example, the attribute "front door" is associated with both the alarm "front door or safety fence open" in the first memory unit 441 and the alarm "front door open" in the second memory unit 442.

If the alarm ID of both the "Front door or safety fence open" alarm and the "Front door open" alarm are stored in the alarm memory unit 443, the cause of the "Front door or safety fence open" alarm is that the front door 222 is open. If the display unit 23 preferentially displays the "Front door or safety fence open" alarm, the worker must check both the front door 222 and the safety fence 13.

On the other hand, if the display unit 23 gives priority to displaying the alarm "front door open", the worker need only check the front door 222. If the worker closes the front door 222, both the causes of the alarm "front door open" and the alarm "front door or safety fence open" are eliminated. If it is known that the display unit 23 gives priority to displaying the alarm "front door open" over the alarm "front door or safety fence open", then when the display unit 23 gives priority to displaying the alarm "front door or safety fence open", the worker need only check the safety fence 13.

Therefore, in S43, the control unit 42 first determines whether the attribute associated with the alarm ID of the alarm issued by the transport device 3 is the same as the attribute associated with the alarm ID of the alarm issued by the control device 4. If the two attributes are the same, the control unit 42 changes the priority associated with the alarm ID of the alarm issued by the transport device 3 in the alarm activation memory unit 443 to the lowest priority "1". If the two attributes are different, the control unit 42 does not change the priority.

Note that the change in priority is not limited to being based on a comparison of alarm attributes, and is not limited to changing the original priority to a priority of "1". FIG. 14 is a schematic diagram showing an example of a data table for adjusting priority. The data table shown in the figure is stored, for example, in the auxiliary memory unit 44. When alarm ID "A01" related to the transport device 3 and alarm ID "B01" related to the control device 4 are stored in the alarm storage unit 443, the priority associated with the alarm ID related to the transport device 3 in the alarm storage unit 443 is decreased by a decrease value of "3". Similarly, when alarm ID "A02" related to the transport device 3 and alarm ID "B04" related to the control device 4 are stored, the priority is decreased by a decrease value of "2".

Figures 15 to 17 are flowcharts showing the procedure of the display process executed by the control device 4. The control unit 42 executes the display process when the alarm memory unit 443 stores an alarm ID. As shown in Figure 15, the control unit 42 determines whether the alarm memory unit 443 stores an alarm ID that is currently "not displayed" (S51). If the alarm memory unit 443 stores an alarm ID that is currently "not displayed" (YES in S51), the control unit 42 determines the alarm that should be displayed with the highest priority among the alarm IDs that are currently "not displayed" (S52).

In S52, if there is one alarm ID that is currently "not displayed", the control unit 42 determines that to be the alarm that should be displayed with the highest priority. If there are multiple alarm IDs that are currently "not displayed", the control unit 42 determines the most recent alarm based on the date and time stored in the alarm storage unit 443 in association with the alarm ID that is currently "not displayed".

The control unit 42 acquires alarm information of the alarm determined in S52 by searching the first memory unit 441 and the second memory unit 442 based on the alarm ID of the alarm determined in S52 (S53). The control unit 42 controls the display unit 23 to display the alarm ID of the alarm determined in S52 and the alarm information acquired in S53 (S54).

After the process of S54 is completed, the control unit 42 starts measuring the time that has elapsed since the most recent alarm was displayed (S55). The control unit 42 changes the current status stored in the alarm storage unit 443 in association with the alarm ID of the alarm determined in S52 from "not displayed" to "displayed" (S56).

The control unit 42 determines whether a predetermined time has elapsed since the latest alarm was displayed (S57). The predetermined time is, for example, 3 seconds. If the predetermined time has elapsed since the latest alarm was displayed (YES in S57), the control unit 42 ends counting the elapsed time (S58), controls the display unit 23 to erase the displayed alarm ID and alarm information (S59), and returns the process to S51.

If the time that has elapsed since the most recent alarm was displayed has not reached the predetermined time (NO in S57), as shown in FIG. 16, the control unit 42 determines whether the worker has satisfied the alarm cancellation conditions stored in the alarm storage unit 443 (S61). The determination by the control unit 42 in S61 is the same as the determination by the control unit 35 in S14 (see FIG. 6). If the worker has not satisfied the alarm cancellation conditions (NO in S61), the control unit 42 returns the process to S57 (see FIG. 15).

When the worker satisfies the alarm cancellation condition (YES in S61), the control unit 42 determines whether or not to store the alarm history based on the history necessity information (S62). When storing the alarm history (YES in S62), the control unit 42 reads the alarm ID and alarm date and time of the alarm that satisfied the cancellation condition from the alarm generation storage unit 443 and writes them to the history storage unit 444 (S63).

After writing to the history storage unit 444 in S63, or if the alarm history is not stored (NO in S62), the control unit 42 deletes the data associated with the alarm ID of the alarm that satisfied the cancellation condition from the alarm generation storage unit 443 (S64). The control unit 42 controls the display unit 23 to erase the alarm ID and alarm information being displayed (S65), and ends the display process. After ending the display process, the control unit 42 executes the display process again at an appropriate timing.

As shown in FIG. 15, if the alarm memory unit 443 does not store an alarm ID that is currently "not displayed" (NO in S51), as shown in FIG. 17, the control unit 42 determines the alarm that should be displayed with the highest priority from among the alarm IDs that are currently "displayed" (S71).

In S71, if there is one alarm ID that is currently "displayed", the control unit 42 determines that as the alarm that should be displayed with the highest priority. If there are multiple alarm IDs that are currently "displayed", the control unit 42 determines the alarm that should be displayed with the highest priority based on the priority stored in the alarm memory unit 443 in association with the currently "displayed" alarm ID. Specifically, the control unit 42 determines the alarm with the highest priority as the alarm that should be displayed with the highest priority. If there are multiple alarms with the highest priority, the control unit 42 determines the alarm with the earliest alarm date and time among the highest priority alarms as the alarm that should be displayed with the highest priority.

The control unit 42 searches the first memory unit 441 and the second memory unit 442 based on the alarm ID of the alarm determined in S71 to obtain alarm information of the alarm determined in S71 (S72). The control unit 42 controls the display unit 23 to display the alarm ID of the alarm determined in S71 and the alarm information obtained in S72 (S73).

After completing the process of S73, the control unit 42 determines whether the worker has satisfied the alarm cancellation conditions stored in the alarm storage unit 443 (S74). The determination by the control unit 42 in S74 is the same as the determination by the control unit 35 in S14 (see FIG. 6). If the worker has satisfied the alarm cancellation conditions (YES in S74), the control unit 42 moves the process to S62 (see FIG. 16).

If the operator does not satisfy the alarm cancellation conditions (NO in S74), the control unit 42 determines whether or not the priority adjustment process shown in FIG. 13 has been executed after the end of S71 in parallel with the currently executing display process (S75). The process of S75 is a process for determining whether or not a new alarm has been issued after determining the alarm that should be displayed with the highest priority. If the priority adjustment process has not been executed (NO in S75), the control unit 42 returns to the process of S74 and executes the process of S74 again at an appropriate timing.

When the priority adjustment process has been executed (YES in S75), the control unit 42 controls the display unit 23 to erase the displayed alarm ID and alarm information (S76), and returns the process to S51 (see FIG. 15). As a result, the control unit 42 determines YES in S51, so that the display unit 23 displays the latest alarm.

The control unit 42 in S52 and S71 functions as a priority determination unit in this embodiment. The control unit 42 in S54 and S73 functions as a display control unit in this embodiment. The control unit 42 in S62 functions as a determination unit in this embodiment.

FIG. 18 is a schematic diagram showing an example of the latest alarm displayed on the display unit 23. As shown in FIG.
As a result of the process of S54, the display unit 23 displays the alarm ID of the latest alarm, the cause of the alarm, and the method of canceling the alarm in a predetermined display area. In association with these, it is preferable that the display unit 23 display a message indicating that this is the latest alarm.

FIG. 19 is a schematic diagram showing an example of a top-priority alarm displayed on the display unit 23. As shown in FIG.
As a result of the process of S73, the display unit 23 displays the alarm ID of the alarm with the highest priority, the cause of the alarm, and the method of canceling the alarm in a predetermined display area. In association with these, the display unit 23 desirably displays a message indicating that the alarm is the alarm with the highest priority.
If the highest priority alarm is the same as the latest alarm, the alarm displayed on the display unit 23 as a result of the process in S54 is the same as the alarm displayed on the display unit 23 as a result of the process in S73.

According to the machining system 1 described above, the worker performs the work of canceling the alarm by looking at the alarm information displayed on the display unit 23. Since the worker does not need to look up the alarm information in the paper manual or electronic manual based on the alarm ID, the worker can easily grasp the alarm information of the alarm issued by the conveying device 3 or the control device 4.
The display unit 23 displays the alarm information of the most recent alarm for a predetermined period of time, and then displays the alarm information of the alarm with the highest priority, so that the operator can preferentially cancel the alarm with the highest priority while understanding the most recent alarm.

If the result of the process in S34 shown in FIG. 12 is NO, the first memory unit 441 does not store the alarm ID of the alarm determined in S52 and S71. Therefore, the first memory unit 441 stores a predetermined message in association with all alarm IDs not stored in the first memory unit 441 (i.e., unregistered alarm IDs). For example, the predetermined message is the cause of the alarm "An abnormality has occurred in the transport device" and the method of canceling the alarm "Please refer to the manual based on the alarm ID."

FIG. 20 is a schematic diagram showing an example of an unregistered alarm displayed on the display unit 23. As shown in FIG.
For example, as a result of the process of S54, the display unit 23 displays an unregistered alarm ID and a predetermined message as the latest alarm in a predetermined display area. Therefore, the operator can at least understand that an abnormality has occurred in the transport device 3.

The first memory unit 441 is not limited to being provided in the control device 4, and may be provided in the transport device 3, for example. In this case, after the alarm ID is output from the transport device 3 to the control device 4, the transport device 3 outputs alarm information to the control device 4 in response to a request from the control device 4.

After displaying the alarm with the highest priority, the display unit 23 may switch the display of the alarm with the highest priority to the display of an alarm with a lower priority in response to an operation of the operation unit 24 by the operator.
The display unit 23 may display multiple alarms simultaneously. For example, when displaying two alarms simultaneously, the display unit 23 displays the latest alarm and the alarm with the highest priority, or displays the alarm with the first priority and the alarm with the second priority.

The display unit 23 may display a message to the operator simultaneously with the alarm. For example, when the operator is operating the operation unit 24 to cancel the alarm, the display unit 23 displays the highest priority alarm and a message informing the operator of an operation error of the operation unit 24 made by the operator.
Priority may be set for messages to the worker. In this case, the display unit 23 displays the latest or highest priority alarm and the highest priority message. The control unit 42 may adjust the priority of messages from the transport device 3 to the worker in a predetermined procedure.

The data stored in the history storage unit 444 may be displayed on the display unit 23, or may be sent from the control unit 4 to a printer outside the system and output by the printer onto recording paper.
The history of alarms issued by the conveying device 3 may be stored in the auxiliary memory unit 37 of the conveying device 3, but since the time kept by the clock unit 45 of the control device 4 may not match the time kept by the clock unit provided in the conveying device 3, it is desirable to manage it all at once in the control device 4.

The machining system 1 may be configured to include a data server having a first memory unit 441, a second memory unit 442, an alarm memory unit 443, or a history memory unit 444, and the control unit 42 of the control device 4 may request data from the data server as necessary.

The embodiments disclosed herein are illustrative in all respects and should not be considered limiting. The scope of the present invention is intended to include not only the above-mentioned meaning, but also the meaning equivalent to the claims and all modifications within the scope of the claims.

REFERENCE SIGNS LIST 1 Machining system 2 Machine tool 23 Display unit 3 Conveyor device 4 Control device 42 Control unit (reception unit, display control unit, priority order determination unit, judgment unit)
441 First storage unit 442 Second storage unit 443 Alarm storage unit 444 History storage unit 4P Computer program (program)
5. Work

Claims (8)

A control device for controlling an operation of a machine tool having a display unit,
a first storage unit that stores, in association with each other, identification information for identifying an alarm related to a transport device that loads and unloads a workpiece to and from the machine tool , first alarm information contributing to canceling the alarm, and a priority level of the alarm ;
a reception unit that receives the identification information from the transport device;
a display control unit that controls the display unit to display the first alarm information stored in the first storage unit in association with the identification information received by the receiving unit ;
a second storage unit that stores second alarm information contributing to canceling an alarm related to the machine tool and a priority level of the alarm in association with each other;
a priority order determination unit that determines the priority order of each alarm when there are a plurality of alarms related to the transport device and the machine tool;
Equipped with
when the plurality of alarms include an alarm related to the transport device and an alarm related to the machine tool and a predetermined condition is satisfied, the priority order determination unit sets the priority of the alarm related to the transport device lower than the priority stored in the second storage unit and then determines the priority order of each alarm;
The control device , characterized in that the display control unit controls the display unit to display first or second alarm information of an alarm with the highest priority based on a result of the determination by the priority determination unit . each of the first storage unit and the second storage unit further stores attributes of the alarm in association with each other;
2. The control device according to claim 1, wherein the predetermined condition is satisfied when an attribute of an alarm related to the transport device is the same as an attribute of an alarm related to the machine tool. a storage unit for storing a data table indicating a combination of an alarm related to the transport device and an alarm related to the machine tool;
Further comprising:
2. The control device according to claim 1, wherein the case where the predetermined condition is satisfied is a case where a combination of an alarm related to the transport device and an alarm related to the machine tool is shown in the data table. The control device according to any one of claims 1 to 3, characterized in that when there are a total of multiple alarms related to the transport device and alarms related to the machine tool, the display control unit controls the display unit to display first or second alarm information of the latest alarm for a predetermined period of time, and then display first or second alarm information of the alarm with the highest priority. A control device as described in any one of claims 1 to 4, characterized in that when the identification information accepted by the acceptance unit is not stored in the first memory unit, the display control unit controls the display unit to display a predetermined message. a determination unit that determines whether or not to store an alarm history related to the transport device;
The control device according to any one of claims 1 to 5, further comprising a history memory unit that, when the judgment unit judges that the alarm history should be stored, stores the identification information received by the reception unit in association with information indicating the timing at which the reception unit received the identification information. A machine tool having a display unit;
A control device for controlling an operation of the machine tool;
A conveying device that carries in and out a workpiece to the machine tool,
a first storage unit that stores identification information for identifying an alarm related to the transport device, first alarm information contributing to canceling the alarm , and a priority level of the alarm in association with each other ;
a second storage unit that stores second alarm information contributing to canceling an alarm related to the machine tool and a priority level of the alarm in association with each other;
having
The control device includes:
a reception unit that receives the identification information from the transport device;
a display control unit that controls the display unit to display the first alarm information stored in the first storage unit in association with the identification information received by the reception unit ;
a priority order determination unit that determines the priority order of each alarm when there are a plurality of alarms related to the transport device and the machine tool;
Equipped with
when the plurality of alarms include an alarm related to the transport device and an alarm related to the machine tool and a predetermined condition is satisfied, the priority order determination unit sets the priority of the alarm related to the transport device lower than the priority stored in the second storage unit and then determines the priority order of each alarm;
The machining system is characterized in that the display control unit controls the display unit to display first or second alarm information of the alarm with the highest priority based on the determination result of the priority determination unit . A program executable by a control device for controlling an operation of a machine tool,
receiving, from a transport device that carries in and out a workpiece to and from the machine tool, identification information for identifying an alarm related to the transport device;
acquiring the first alarm information corresponding to the received identification information from a first storage unit that stores the identification information, first alarm information contributing to canceling the alarm, and a priority level of the alarm in association with each other ;
Displaying the acquired first alarm information;
when an alarm related to the machine tool is issued, displaying second alarm information acquired from a second storage unit that stores second alarm information contributing to canceling the alarm related to the machine tool in association with a priority of the alarm;
When the total number of alarms related to the transport device and the machine tool is multiple, when the multiple alarms include an alarm related to the transport device and an alarm related to the machine tool and a predetermined condition is satisfied, the priority of the alarm related to the transport device is made lower than the priority stored in the second storage unit, and then the priority order of each alarm is determined;
A program for causing the control device to execute a process of displaying first or second alarm information of an alarm with the highest priority .

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