JP6259693B2 - Process management system, process management apparatus, and process management method - Google Patents

Description

  The present invention relates to a process management system, a process management apparatus, and a process management method.

  Conventionally, process management is important in factories (for example, automobile manufacturing factories), and various methods relating to process management have been studied. For example, Patent Document 1 discloses a production management system that appropriately manages the production plan of a product and appropriately manages the progress of an actual product production operation.

  Specifically, the production management system described in Patent Document 1 is a database in which the number of used parts, work time, machine work time, test time, and information from parts procurement to production completion necessary for production of one product are registered. The database is updated from time to time based on information on new specification products and product renewal, and based on this database, the stress process (the process of heavy work or the work process not digested as planned) is managed. In addition to displaying the stress process predictions and results on the screen for visual management, the relevant departments are notified by e-mail, and replanning can be automatically executed.

JP 2011-90595 A

  By the way, various devices are installed in the factory, and the various devices are connected to a programmable logic controller (PLC). Examples of the various devices include sensors that detect that a vehicle on a production line has passed.

  This sensor is installed at each point on the production line, and transmits a passage signal to the PLC when it detects that the vehicle has passed through the production line. When the PLC receives a passage signal from the sensor, the PLC stores the information as device information in a register included in the PLC, and appropriately controls various devices based on the stored device information.

  The PLC is connected to various devices while being connected to a host device such as a client or a server. A communication standard called OPC (OLE for Process Control) is used for connection between the PLC and the host device. The OPC is used to enable communication between the host device and the PLC, regardless of the vendor of the PLC. Communication by OPC is also called OPC communication.

  Through this OPC communication, the host device can appropriately acquire the device information stored in the register of the PLC. By analyzing the device information acquired from the PLC, the host device can grasp the delay of the manufacturing process and perform process management.

  However, when the host device tries to communicate with PLCs of different vendors by OPC communication, various settings are required for the PLCs of different vendors on the host device side, which requires complicated work. In addition, when the device information from the PLC is to be analyzed by the host device, specialized knowledge for analysis is required.

  Furthermore, even when the analysis result that the manufacturing process is delayed in the host device is obtained, since the tact time is different for each part of the car, the delay obtained as the analysis result is actually It is difficult to determine whether it is within the allowable range, whether it is minor even outside the allowable range, or whether it is serious.

  In other words, there is a first problem that a complicated setting operation is required when an attempt is made to connect the host device and the PLC in a communicable manner by OPC communication. Moreover, when trying to analyze the device information acquired by OPC communication in the host device, there is a second problem that analysis cannot be performed without specialized knowledge. Even if the analysis is possible, there is a third problem that the process management cannot be performed appropriately if the analysis result is not valid.

  The present invention has been made in consideration of the above points, and can easily acquire device information without requiring complicated setting work, and can perform appropriate process management based on the acquired device information. A management system, a process management apparatus, and a process management method are proposed.

In order to solve such problems, the present invention, a controller for controlling the device installed in factory hall for detecting that the upper production line product has passed, are communicably connected by the controller and OPC communication In the process management system including the process management device, the controller includes a register for storing device information from the device, and the process management device includes a register storage area, a monitoring cycle, and a tag for each tag associated with the device. drawing necessity, drawing position, and reference a storage unit for storing a definition information in which information of the drawn image is Teigizuke according to the state of the product is detected by the device, the definition information of the storage unit, the definition information Monitoring communication that periodically accesses the storage area of the register and monitors the device information of the device associated with the definition information tag based on the included monitoring cycle Determining whether or not the device information monitored by the monitoring communication unit has been updated, and whether or not drawing is defined in the tag associated with the device that has transmitted the device information determined to be updated, the drawing position, and When the drawing image is read out and the read drawing necessity indicates that drawing is necessary, the read drawing image is displayed at the read drawing position so that the product update location on the production line can be seen at a glance. And a previous value comparison unit that visualizes in a graspable manner .

In order to solve such problems, the present invention, the step of communicatively coupled by the controller and OPC communication for controlling a device installed in factory hall for detecting that the upper production line product has passed In the management apparatus, the controller includes a register for storing device information from the device, and for each tag associated with the device, a storage area of the register, a monitoring cycle, whether drawing is necessary, a drawing position, and a product detected by the device a storage unit in which information of the drawing image according to the state is stored as definition information that is Teigizuke, referring to the definition information of the storage unit, on the basis of the monitoring period which are included in the definition information, periodically to a storage area of the register Monitoring communication unit that monitors the device information of the device that is accessed and associated with the definition information tag, and whether the device information monitored by the monitoring communication unit has been updated The drawing necessity, drawing position, and drawing image defined in the tag associated with the device that has transmitted the device information that has been determined to be updated are read, and the read drawing necessity is required to be drawn. Including a previous value comparison unit that visualizes the update location of the product on the production line at a glance by displaying the read drawing image at the read drawing position. Features.

In order to solve such problems, the present invention, a controller for controlling the device installed in factory hall for detecting that the upper production line product has passed communicably connected by the controller and OPC communication in process control method of process control system comprising a process control device that is, the controller includes a register, a first step of the controller to store the device information from the device to register, process control equipment is , for each tag to be associated with the device, the storage area of the register, the monitoring period, the drawing necessity, drawing position, and a definition information in which information of the drawn image is Teigizuke according to the state of the product being detected by the device comprising a that stores storage unit, process management apparatus, it refers to the definition information of the storage unit, on the basis of the monitoring period which are included in the definition information, a constant in the storage area of the register The second step of monitoring the device information of the device associated with the tag of the definition information and accessing the definition information, and whether or not the device information monitored in the second step has been updated, and determined that it has been updated Read the drawing necessity, drawing position, and drawing image defined in the tag associated with the device that sent the device information, and read when the drawing necessity indicates that drawing is necessary And a third step of visualizing the update location of the product on the production line in a manner that can be grasped at a glance by displaying the drawn image read at the drawing position .

  ADVANTAGE OF THE INVENTION According to this invention, while being able to acquire apparatus information easily, without requiring a complicated setting operation | work, appropriate process management can be performed based on the acquired apparatus information.

1 is an overall configuration diagram of a process management system. It is a conceptual diagram of difference information. It is a conceptual diagram of track record information. It is a conceptual diagram of process information. It is a conceptual diagram of definition information. It is a screen block diagram. It is a conceptual diagram explaining the outline | summary of the process in this Embodiment. It is a conceptual diagram which shows a normal distribution. It is a flowchart which shows the monitoring communication process. It is a flowchart which shows last time value comparison processing. It is a flowchart which shows process performance comparison processing.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(1) Overall Configuration FIG. 1 shows the overall configuration of a process management system 1 in the present embodiment. The process management system 1 includes a programmable logic controller (PLC) 10, a process management apparatus 20, an OPC (OLE for Process Control) server 30, a monitor 40, a host process 50, and the like.

  The PLC 10 is a control device installed in a factory (for example, an automobile manufacturing factory), and includes a CPU (Central Processing Unit) 11, a register 12, and a communication unit 13. When the CPU 11 receives signals from various devices (not shown) installed in the factory, the CPU 11 stores the received signals in the register 12 as device information. As various devices installed in the factory, for example, there is a sensor for detecting that a vehicle on a production line has passed. When the device is a sensor, the CPU 11 stores a passage signal from the sensor in the register 12 as device information.

  The register 12 stores device information from various devices. In addition, when new device information is received from the same device that already stores device information, the register 12 overwrites and stores past device information with new device information.

  The communication unit 13 is connected to the OPC server 30 and transmits device information stored in the register 12 to the OPC server 30. The device information transmitted to the OPC server 30 is transmitted to the process management apparatus 20 and is held in the process management apparatus 20. On the other hand, the communication unit 13 receives control information from the OPC server 30. The control information received here is information for controlling the operation of various devices. The received control information is converted into a control signal by the CPU 11 and transmitted to various devices.

  The process management apparatus 20 includes a CPU 21, an HDD (Hard Disk Drive) 22, a communication unit 23, an operation display unit 24, and the like. The CPU 21 comprehensively controls the operation of the process management device 20 based on various programs such as the monitoring communication unit 211, the previous value comparison unit 212, and the process performance comparison unit 213, and various information stored in the HDD 22. .

  Although details of processing by various programs such as the monitoring communication unit 211, the previous value comparison unit 212, and the process performance comparison unit 213 of the CPU 21 will be described later (FIGS. 9 to 11), the CPU 21 executes processing by these various programs. By doing so, appropriate process management can be performed.

  The HDD 22 includes difference information 221, performance information 222, process information 223, and definition information 224. The details of the difference information 221, the performance information 222, the process information 223, and the definition information 224 will be described later (FIGS. 2 to 4), but the difference information 221 is a time at which device information is scheduled to be acquired (process time). And the time (actual time) when the device information is actually acquired, the actual information 222 is the actual device information (actual value) acquired at a certain time, and the process information 223 is acquired. The definition information 224 is information that is defined in various devices including the address of the register 12 and the like.

  The communication unit 23 is connected to the OPC server 30 and transmits control information for controlling the operation of various devices installed in the factory to the OPC server 30. The control information transmitted to the OPC server 30 is converted into a control signal by the PLC 10 and transmitted to various devices. On the other hand, the communication unit 23 receives device information from the OPC server 30. The received device information is stored in the HDD 22 by the CPU 21.

  The operation display unit 24 includes an operation unit such as a keyboard and a mouse and a display unit such as an LCD (Liquid Crystal Display).

  The OPC server 30 is connected to the communication units 13 and 23 via a LAN (Local Area Network). For connection, a communication standard called OPC is used. In addition, although the OPC server 30 is installed independently here, it is not restricted to this, It is good also as being integrated in the process management apparatus 20 as what is comprised integrally.

  The monitor 40 is a display unit installed in the factory. The monitor 40 displays a product (vehicle) visualized so that the progress of the manufacturing process can be grasped at a glance. The display mode on the monitor 40 will be described later (FIG. 6).

  The host process 50 is a server that is connected to the host side of the process management apparatus 20 and comprehensively controls process management.

(2) Details of Each Information With reference to FIGS. 2 to 5, each information such as difference information 221, performance information 222, process information 223, definition information 224 and the like stored in the HDD 22 of the process management apparatus 20 will be described.

  FIG. 2 shows a conceptual configuration of the difference information 221. The difference information 221 includes a tag column 2211 and a delayed seconds column 2212. The tag column 2211 stores tag identification information associated with a device. In the delay seconds column 2212, the process time and the delay seconds from the process time are stored.

  Therefore, in the case of FIG. 2, for example, the device associated with the tag whose identification information is “PI01” starts operation when the process time is “13: 00: 00: 00” (the number of delayed seconds is “0”). When the process time is “13:00:05”, the device information is not acquired, and actually the device information is acquired with a delay of “3” seconds. That is, the device with the tag “PI01” actually acquired the device information when the time is “13:00:08” (actual time).

  In addition, the device of “PI01” has no plan to acquire device information when the process time is “13:00:10” (the delay time is “blank”), and the process time is “13:00:15”. It sometimes shows that device information is acquired again, and at this time it is acquired with a delay of “2” seconds.

  FIG. 3 shows a conceptual configuration of the performance information 222. The performance information 222 includes a tag field 2221 and a device information field 2222. The tag column 2221 stores tag identification information associated with the device. The device information column 2222 stores device information (actual value) actually acquired from the device at a certain time.

  Therefore, in the case of FIG. 3, for example, a device associated with a tag whose identification information is “PI01” has acquired device information (actual value) “000F” at a certain time.

  FIG. 4 shows a conceptual configuration of the process information 223. The process information 223 includes a tag column 2231 and a device information column 2232. The tag field 2231 stores tag identification information associated with a device. In the device information column 2232, device information (process value) scheduled to be acquired from the device is stored for each process time.

  Accordingly, in the case of FIG. 4, for example, for a device associated with the tag whose identification information is “PI01”, device information “0000” is scheduled to be acquired when the process time is “13:00:00”. It is indicated that the device information “000F” is scheduled to be acquired at “13:00:05” after 5 seconds. The device information “000F” is acquired with a delay of “3” seconds when the difference information 221 in FIG. 2 is referred to.

  FIG. 5 shows a conceptual configuration of the definition information 224. The definition information 224 includes an item column 2241 and an information column 2242. The item column 2241 stores items to be defined in the device. The information column 2242 stores information defined for the device.

  Therefore, in the case of FIG. 5, for example, “1”, “2”, and “3” are stored in the “number” item, and the definition information of a total of three devices is stored as the definition information 224. Has been. For the device with the number “1”, for example, “PI01” is defined as the “tag”, and the device type name “Device001” is defined as the “device type”. Yes.

  Also, “5” seconds are defined as the “monitoring cycle”, and it is indicated that the device of “PI01” acquires device information at intervals of 5 seconds. In addition, “1” is defined as “necessity of drawing”, which indicates that drawing is necessary. When drawing, the position of “192” pixels in the “drawing position X” direction on the screen is set as the drawing start position, and the position of “168” pixels in the “drawing position Y” direction is set as the drawing start position. Has been.

(3) Screen Configuration FIG. 6 shows an example of the screen configuration displayed on the monitor 40. Images G1 and G2 are displayed on the monitor 40. In the images G1 and G2, the vehicle ID and time are displayed, and the state of the vehicle corresponding to the vehicle ID and time is displayed at a glance.

  Accordingly, in the case of FIG. 6, the image G1 shows the state of the vehicle on the production line when the vehicle ID is “00001” and the time is “18: 00: 00: 00”. As shown in the image G1, it can be easily understood that the wheel is not yet attached to the vehicle when the time is “18:00:00”.

  On the other hand, the image G2 shows the state of the vehicle on the production line when the vehicle ID is “00001” and the time is “18:00:30”. The vehicle shown in the image G2 is a vehicle 30 seconds after the vehicle shown in the image G1 because the vehicle ID is the same as that of the vehicle shown in the image G1. As shown in the image G2, it can be easily understood that the wheel G21 is attached to the vehicle when the time is “18:00:30”.

  In addition, when abnormality, such as a delay, has occurred in the mounting process of the wheel G21, the wheel G21 may be identified and displayed by changing the color and display mode from other locations. For example, only the wheel G21 may be displayed in red or blinking. In this case, it is possible to easily grasp that an abnormality such as a delay has occurred in the process of the wheel G21.

(4) Overview of Processing FIG. 7 shows an overview of processing in the present embodiment. The present embodiment enables the process management apparatus 20 to acquire device information from the PLC 10 of a different vendor without requiring complicated setting work, and can perform appropriate process management based on the acquired device information. It is what you want to do.

  First, when the PLC 10 receives signals from various devices (not shown) installed in the factory, the PLC 10 stores the received signals in the register 12 in the PLC 10 as device information. In the register 12, a storage area for storing device information is provided for each device. For example, device information of the sensor A1 is stored in the storage region A11, and device information of the sensor B1 is stored in the storage region B11.

  The monitoring communication unit 211 periodically monitors the register 12 of the PLC 10 via the OPC server 30 and refers to the definition information 224 when monitoring. The definition information 224 stores a tag associated with the device and an arbitrary storage area of the register 12 associated with the tag, and a monitoring cycle is set for the tag. Therefore, the monitoring communication unit 211 can periodically monitor an arbitrary storage area of the register 12 with a predetermined monitoring cycle by referring to the tag of the definition information 224.

  When the monitoring communication unit 211 detects that the device information is stored or overwritten in the storage area of the register 12, the monitoring communication unit 211 transmits the stored or overwritten device information to the previous value comparison unit 212.

  When the previous value comparison unit 212 receives the device information from the monitoring communication unit 211, the previous value comparison unit 212 stores the received device information in the HDD 22 as performance information 222. The previous value comparison unit 212 refers to the performance information 222, compares the device information received this time with the device information received last time, and determines whether there is a difference.

  When there is a difference, that is, when the device information has been updated, the previous value comparison unit 212 notifies the process performance comparison unit 213 that it has been updated, and monitors the update location at a glance. 40.

  When the process result comparison unit 213 receives the notification from the previous value comparison unit 212, the process result comparison unit 213 refers to the process information 223, and the time when the device actually acquires the device information (actual time) and the scheduled acquisition time (process time). ) And the number of delayed seconds obtained as a calculation result is stored in the difference information 221.

  The process performance comparison unit 213 checks the degree of delay when a delay is recognized in the performance time. Specifically, the process performance comparison unit 213 approximates the distribution of the difference between the past performance time and the process time as a normal distribution (FIG. 8), and a significant difference is generated that is recognized as being sufficiently delayed. If it is, it is determined to be abnormal. Then, the process performance comparison unit 213 displays the abnormal part (delayed part) on the monitor 40 in such a manner that the abnormal part (delayed part) can be grasped at a glance, and notifies the upper process 50.

  FIG. 8 shows a normal distribution F (X) calculated based on the difference between the actual time and the process time. The normal distribution F (X) is used to determine whether the delay is within the allowable range or out of the allowable range and is abnormal when the actual time is delayed. , The probability that the number of delayed seconds is X. The normal distribution F (X) is calculated by the following formula 1.

  The average m and the standard deviation σ of the past delayed seconds when the past five delayed seconds are X1, X2, X3, X4, and X5 are calculated by the following equations 2 and 3.

  If a delay is recognized in the actual time, the process performance comparison unit 213 substitutes the current delay seconds for the normal distribution F (X) and calculates the probability that a delay of the current delay seconds will occur. Then, when the significance level is set to 5% and the probability obtained as the calculation result is less than 5%, the process performance comparison unit 213 determines that the current delay time is outside the allowable range and is abnormal. To do.

(5) Details of Processing Details of processing by the monitoring communication unit 211, the previous value comparison unit 212, and the process performance comparison unit 213 described with reference to FIGS. 7 and 8 will be described with reference to FIGS.

  FIG. 9 shows details of processing by the monitoring communication unit 211. This process is started when, for example, the monitoring communication unit 211 receives an execution instruction from the operation display unit 24 or when the power of the process management apparatus 20 is turned on.

  First, the monitoring communication unit 211 reads various information associated with each tag with reference to the definition information 224 (SP1). Specifically, the storage area of the register 12, the monitoring cycle, whether drawing is necessary, and drawing information (drawing position and drawing image) are associated with the tag, and the monitoring communication unit 211 associates various information associated with these tags. Is read for each tag.

  Next, the monitoring communication unit 211 refers to the monitoring cycle of the various information that has been read, and determines whether there is a tag for reading device information from the storage area of the register 12 (SP2). If the monitoring communication unit 211 obtains a negative result in the determination at step SP2, the monitoring communication unit 211 refers to the smallest monitoring cycle among the monitoring cycles associated with the tag and until the next time the device information is read out. Time is calculated (SP3).

  The monitoring communication unit 211 waits for the time obtained as the calculation result (SP4), and then determines again whether there is a tag for the read timing (SP2). If the monitoring communication unit 211 obtains a positive result in the determination at step SP2, the monitoring communication unit 211 reads the device information from the storage area of the register 12 specified by the tag of the read timing (SP5), and ends this process.

  The monitoring communication unit 211 transmits the read device information to the previous value comparison unit 212 after step SP5. Here, the device information read by the monitoring communication unit 211 includes device information of a plurality of devices such as sensors A to D, for example.

  FIG. 10 shows details of processing by the previous value comparison unit 212. This process is started when the previous value comparison unit 212 acquires the device information from the monitoring communication unit 211.

  First, the previous value comparison unit 212 concatenates all pieces of device information read by the monitoring communication unit 211 to generate one number string (SP11). Next, the previous value comparison unit 212 generates a single numeric string by similarly connecting all device information read by the monitoring communication unit 211 last time (SP12). Then, the previous value comparison unit 212 calculates the exclusive OR of the two generated numeric strings (SP13), and determines whether or not the exclusive OR is zero (SP14).

  If the previous value comparison unit 212 obtains a positive result in the determination at step SP14, it determines that the device information has not been updated because there is no difference, notifies the process result comparison unit 213 of the determination result, and ends this processing. To do.

  In contrast, if the previous value comparison unit 212 obtains a negative result in the determination of step SP14, it determines that the device information has been updated because there is a difference, and notifies the process result comparison unit 213 of the determination result. At the same time, the tag determined to have a difference, the device information read this time, and the device information read last time are transmitted to the process performance comparison unit 213 (SP15).

  Next, the previous value comparison unit 212 refers to the drawing necessity associated with the tag determined to have a difference, and determines whether the tag is a drawing target tag (SP16). If the previous value comparison unit 212 obtains a negative result in the determination at step SP16, it ends this process.

  On the other hand, when the previous value comparison unit 212 obtains a positive result in the determination at step SP16, it acquires the drawing information (drawing position and drawing image) stored in the definition information 224 (SP17). Then, the previous value comparison unit 212 sets the drawing flag to ON (SP18) and ends this process.

  Note that the previous value comparison unit 212 may acquire the drawing position and the drawing image from the definition information 224 after drawing flag is set to ON and draw it on the monitor 40. In this case, by looking at the image drawn on the monitor 40, it is possible to grasp the updated portion at a glance.

  FIG. 11 shows details of processing by the process performance comparison unit 213. This process is started when the process result comparison unit 213 receives a notification of the presence or absence of a difference from the previous value comparison unit 212.

  First, the process performance comparison unit 213 refers to the process information 223 and reads the process information 223 indicating the process value of each piece of device information at each time (SP21). Next, when comparing the device information (actual value) read from the register 12 with the process value indicated in the process information 223, the process performance comparison unit 213 sequentially increments the variable N ( The shift time N) is set to 0 and initialized (SP22). Further, the process performance comparison unit 213 determines how many increment variables N are to be increased, that is, determines the maximum value M of N (SP23).

  Here, the following method is adopted as a method for determining the maximum value M in step SP23. As a premise, the difference between the process time so far and the actual time is accumulated. Next, approximation is performed assuming that the accumulated deviation follows a normal distribution, and the mean and variance are calculated. When the significance level is 5%, the shift time N below the significance level is determined to be significant, and the minimum value of the shift times N having a significant difference is determined to be M.

  Next, the process performance comparison unit 213 obtains the Nth previous time among the times indicated in the process information 223, and generates a number string by connecting the process values corresponding to the obtained time (SP24). And the process performance comparison part 213 calculates an exclusive OR with the number sequence produced | generated in step SP11 (SP25), and judges whether an exclusive OR is zero (SP26).

  If the process result comparison unit 213 obtains a positive result in the determination at step SP26, it determines that there is no process delay, and proceeds to step SP35. On the other hand, if the process result comparison unit 213 obtains a negative result in the determination at step SP26, it determines that there is a possibility of process delay, and increments the increment variable N by +1 (SP27).

  Next, the process performance comparison unit 213 determines whether or not the increment variable N is M or less (SP28). When the process result comparison unit 213 obtains a positive result in the determination at step SP28, the process performance comparison unit 213 proceeds to step SP24 and repeats the processes (SP24 to SP27) described above.

  On the other hand, when the process performance comparison unit 213 obtains a negative result in the determination at step SP28, the process performance comparison unit 213 considers the possibility that the actual progress has progressed beyond the schedule indicated in the process information 223. The time immediately after the current time shown in the information 223 is acquired, and device information corresponding to the acquired time is concatenated to generate a number string (SP29). And the process performance comparison part 213 calculates an exclusive OR with the number sequence produced | generated in step SP11 (SP30), and judges whether an exclusive OR is zero (SP31).

  If the process result comparison unit 213 obtains a positive result in the determination at step SP31, the process performance comparison unit 213 determines that there is no delay in the progress status or that there is some delay, but proceeds to step SP35. On the other hand, if the process performance comparison unit 213 obtains a negative result in the determination at step SP31, it determines that there is a delay in the progress and the delay is abnormal.

  Next, the process performance comparison unit 213 determines whether the tag of the device information determined to be abnormal is a drawing target tag (SP32). The process performance comparison part 213 will transfer to step SP35, if a negative result is obtained by judgment of step SP32. On the other hand, when the process result comparison unit 213 obtains a positive result in the determination at step SP32, it obtains the drawing position and drawing image associated with the tag from the definition information 224 (SP33), and sets the drawing flag to ON. Set (SP34).

  Next, the process performance comparison unit 213 determines whether or not the drawing flag is ON (SP35). If the process performance comparison unit 213 obtains a negative result in the determination at step SP35, it ends this process. On the other hand, when the process result comparison unit 213 obtains a positive result in the determination at step SP35, it draws the target part on the monitor 40 based on the acquired drawing position and drawing image (SP36), and ends this process. To do.

(6) Effects of the present embodiment As described above, according to the process management system 1 of the present embodiment, the process management apparatus 20 refers to the definition information 224, and thereby the register 12 of the PLC 10 via the OPC server 30. Can be accessed. The definition information 224 can be easily rewritten. Therefore, the process management apparatus 20 is newly added to the plurality of PLCs 10 with different vendors or the process management system 1 by appropriately changing the definition information 224 without complicated setting work or system compilation. The PLC 10 can be easily accessed.

  Further, the device information acquired from the register 12 is compared with the previously acquired device information. When update is permitted, the device information is analyzed, and the updated part is displayed on the monitor 40 to display the product on the production line. You can visualize the progress. Therefore, even a worker who is not an expert in process management can easily grasp the progress of the process.

  In addition, the device information acquired from the register 12 is compared with the device information indicated in the process information 223, and when a delay is recognized, it is determined whether or not the delay is within an allowable range, and the delay occurs. The delay part can be visualized by identifying and displaying the parts being displayed on the monitor 40. Therefore, even a worker who is not a process management specialist can easily grasp the delay of the process.

1 Process management system 10 PLC
20 Process management device 211 Monitoring communication unit 212 Previous value comparison unit 213 Process result comparison unit 221 Difference information 222 Result information 223 Process information 224 Definition information 30 OPC server 40 Monitor 50 Host device

Claims (6)

A controller for controlling the device installed in factory hall for detecting that the upper production line product has passed, in the controller and process control system comprising a process control device that is communicably connected by the OPC communication ,
The controller is
Comprising a register for storing device information from the device;
The process management apparatus is
For each tag to be associated with the device, the storage area of the register, monitoring period, rendering necessity, drawing position, and definition information of the drawn image is Teigizuke according to the state of the product to be detected by the device A storage unit for storing information;
Based on the monitoring information included in the definition information with reference to the definition information in the storage unit, the storage area of the register is periodically accessed to monitor the device information of the device associated with the tag of the definition information. A monitoring communication unit;
It is determined whether or not the device information monitored by the monitoring communication unit has been updated, and whether or not the drawing is defined, the drawing position, and the drawing defined in the tag associated with the device that has transmitted the device information determined to have been updated. When the image is read and the read / unnecessary drawing indicates that drawing is required, the read image is displayed at the read drawing position so that the updated part of the product on the manufacturing line can be seen at a glance. A process management system comprising a previous value comparison unit that visualizes in a manner that can be grasped . The monitoring communication unit
It said read previous SL device information together Monitoring the equipment information register from the register,
The storage unit
Store the device information read this time together with the device information read last time,
The previous value comparison unit
Whether the device information read this time has been updated by calculating the exclusive OR of the device information read this time and the device information read last time with reference to the device information stored in the storage unit The process management system according to claim 1, wherein determination is made. The storage unit
The reading time of the device information read from the register by the monitoring communication unit is stored as the actual time, while the scheduled reading time of the device information scheduled to be read from the register in a predetermined process is stored as the process time,
The process management apparatus is
Before Symbol Referring to track record time及beauty Engineering enough time device information read from the register by the monitoring communication unit, determines whether or not it is within the allowable range of the delay time is predetermined, allowable delay time drawing necessity being Teigizuke inside at an unsupported device information range in the tag to be associated with the transmitted equipment reads drawing position and drawing an image, an indication that the read drawing necessity is required drawing claim some time, characterized in that it comprises the steps actual comparison unit for visualizing seemingly to possible understand manner the delay portions of the product in the production line on by displaying the drawing image read out on the read drawing position 2. The process management system according to 2. The process performance comparison unit
Referring to the actual time and the process time, the delay time is approximated as a normal distribution, and the delay time is within a predetermined allowable range based on the approximated normal distribution and a predetermined significance level. The process management system according to claim 3, wherein it is determined whether or not. In process control device that is communicably connected by the controller and OPC communication for controlling a device installed in factory hall for detecting that the upper production line product has passed,
The controller includes a register for storing device information from the device,
For each tag to be associated with the device, the storage area of the register, monitoring period, rendering necessity, drawing position, and definition information of the drawn image is Teigizuke according to the state of the product to be detected by the device A storage unit for storing information;
Based on the monitoring information included in the definition information with reference to the definition information in the storage unit, the storage area of the register is periodically accessed to monitor the device information of the device associated with the tag of the definition information. A monitoring communication unit;
It is determined whether or not the device information monitored by the monitoring communication unit has been updated, and whether or not the drawing is defined, the drawing position, and the drawing defined in the tag associated with the device that has transmitted the device information determined to have been updated. When the image is read and the read / unnecessary drawing indicates that drawing is required, the read image is displayed at the read drawing position so that the updated part of the product on the manufacturing line can be seen at a glance. A process management apparatus comprising: a previous value comparison unit that visualizes in a graspable manner . A controller for controlling the device installed in factory hall for detecting that the upper production line product has passed, the process control system comprising a process control device that is communicably connected by the controller and OPC communication In the process control method,
The controller is,
With a register
A first step of the controller store the device information from the device to the register,
It said process control equipment is,
For each tag to be associated with the device, the storage area of the register, monitoring period, rendering necessity, drawing position, and definition information of the drawn image is Teigizuke according to the state of the product to be detected by the device a storage unit that stores as the information,
The process management device is
Based on the monitoring information included in the definition information with reference to the definition information in the storage unit, the storage area of the register is periodically accessed to monitor the device information of the device associated with the tag of the definition information. A second step;
It is determined whether or not the device information monitored in the second step has been updated, and whether or not drawing is defined, the drawing position, and the drawing defined in the tag associated with the device that has transmitted the device information determined to have been updated. When the image is read and the read / unnecessary drawing indicates that drawing is required, the read image is displayed at the read drawing position so that the updated part of the product on the manufacturing line can be seen at a glance. And a third step of visualizing in a graspable manner. A process management method comprising: