JPH0625924B2 - Program controller - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a program control device for temporally controlling a controlled object according to a predetermined control program.

BACKGROUND OF THE INVENTION Various control devices, such as temperature control devices, have a program function in addition to a conventional temperature control function according to the spread of microcomputers, and have a temperature control pattern in which a temperature to be controlled is programmed in advance. Programmed temperature control devices that can be controlled in time have been used. Here, the program is a series of the temperature, the time for which the temperature is maintained, the control conditions, and the like. This program is different from a normal program (hereinafter referred to as a system program) that describes a series of instructions for a microprocessor or the like, and here, this program is distinguished as a user program. In such a program temperature adjusting device, a set temperature and a control time for keeping the temperature are paired, and a plurality of steps are stored in the storage device with the set temperature as one step. When such a series of steps is once registered in the storage device,
When it is attempted to stop the control operation at an intermediate step, it is necessary to reprogram all 0s in the control time storage area of the step after the stop step. Therefore, the program takes a long time, and if the original user program is restored, the original control time must be written again, which may lead to a program error.

Further, in such a program control device, only one type of control cycle is set in the storage device, and different control cycles cannot be set. Therefore, the inventors have proposed a program control device capable of registering a plurality of patterns called banks, and further registering a combination of these patterns as link data, and performing control in series. However, even when registering such a combination of banks as link data, it is necessary to delete the subsequent bank data when it is desired to stop the control of a predetermined bank or later, and when the control is performed according to the original link data. Has the same problem that it is necessary to correct the link data and add a program, and it takes time to correct the program, which may cause a program error.

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of such a program control device, and even when it is desired to stop the control of a series of registered steps or a series of banks in the middle of a user program, An object of the present invention is to provide a program control device capable of minimizing the change and simplifying the change of the user program and facilitating the return to the original user program.

Structure and Effect of the Invention The present invention is a program control device for temporally controlling a controlled object in accordance with a predetermined control program, and comprises a series of control steps having setting data and control time data at the set values. Storage means for storing a user program, input means for inputting each step data and control stop command during control to a user program area of the storage means, detection means for detecting measured information in a controlled object, and control for controlled object The output means for performing the operation, the determining means for determining whether or not the control stop instruction is stored in the control step for performing the control from the control step stored in the storage means, and the measured information obtained by the detecting means Based on the user program stored in the storage means by driving the output means based on And a control means for stopping the process when the stop instruction is detected.

According to the present invention having such a feature, even when the control of the user program that has already been set is stopped midway, it is easy to write a predetermined control stop command in the first part of the user program to be stopped. Can be controlled, and the change of the user program can be extremely simplified. Further, if only the changed portion is modified, the original user program can be easily restored, the user program can be easily modified and changed, and an easy-to-use program control device can be provided.

Description of Embodiments FIG. 1 is an overall configuration diagram of a program temperature adjusting apparatus showing one embodiment of the present invention. In the figure, the temperature control device 1 is provided with a setting unit 2 for setting temperature control steps and various control parameters, and a display unit 3 for displaying parameters at the time of setting. Further, a temperature sensor 5 provided in the controlled object 4 and an A / D conversion unit 6 for converting the sensor output into a digital amount and inputting the sensor output are provided to a central processing unit (hereinafter referred to as CPU) 7. Given. C
The PU 7 performs program control of the controlled object 4 via the output unit 9 including a heater, a motor, etc., according to the arithmetic processing procedure stored in the memory 8. Further, the CPU 7 is connected to an alarm output unit 10 which issues an alarm when the set temperature and the temperature detected by the sensor have a difference of a predetermined value or more.

FIG. 2 shows the front panel surface of the program temperature controller used for the setting unit 2 and the display unit 3. In the figure, the "PRGM / RUN" key is a switch for switching between the program mode for writing the user program and the operation mode, and the "←" and "→" keys are numerical values for carrying up and down the parameter value respectively. Control key,
The "↑" and "↓" keys are numerical control keys for increasing / decreasing the value of each parameter, and the "WRITE / NEXT" key is a key for setting the display data and storing it in the memory 9 and moving the setting operation to the next step. , "AT" key is a key for setting a value having general versatility when it is not necessary to strictly set the control parameter, and "BANK / LINK"
The key is a key for designating a bank in the program mode, and a key for designating a link in the operation mode, and the "END" key is a key for giving a stop command when the program already written is stopped halfway.

FIG. 3 is a diagram showing a memory map of the memory 8. As shown in the figure, the memory 8 has a system program area for storing the arithmetic processing procedure of the CPU 7 and a user program area for controlling the controlled object 4 in series. As shown in FIG. 3, the user program area has a bank area for storing control data of a plurality of banks 0 to N and a link data area for storing link data. Here, the bank refers to a series of control patterns including a plurality of steps, and the link data is data indicating a combination of the banks. Here, bank 1 is used as link data.
2, 1, 3, ... 4 are held.
In addition, each bank stores the control data common to that bank, that is, the upper and lower limit alarm values, the proportional band, the proportional period, the integral and the differential time, and the set temperature of each step Set0, Set1,
...... and step area S showing the set time Time0, Time1, ......
It has 00 to Sn.

Next, the operation of the program temperature adjusting apparatus will be described with reference to the flowchart. In the flow charts below, the numbers indicated by using leader lines indicate the processing routines or operation steps of the CPU 7. FIG. 4 is a flow chart showing the changing process of the user program of the program temperature adjusting apparatus. When the operation is started in this figure, first, at step 20, it is checked whether or not the setting key has been pressed.
Check whether it is the "ND" key or the numeric key. If this is the "END" key, for example, PV on the display
"-" Is displayed on the display (step 23). If the numerical control key is “←”, “↑”, “→”, “↓”, etc., numerical key processing is performed in routine 24. Then, the process proceeds to step 25, and it is checked whether or not the "WRITE" key is further pressed. If the "WRITE" key is not pressed, return to step 20 and repeat the same processing.
If the key is the "WRITE" key, the process proceeds to step 26 and a writing process for writing the setting data into a predetermined storage area of the memory 8 is performed (step 26). Also, the pressed key is "END"
If it is not a key or a numerical key, other key input processing is performed in routine 27, and when these processings are finished, another writing processing to the program area is performed and the processing is finished.

For example, as shown in FIG. 5, the control pattern of a certain bank (bank 1) has already been set, but if this control is to be ended in step S02, steps 20 to 25 in the flow chart shown in FIG. The above loop is repeated to write "---" as a control stop command in the time setting area Time2 of step S02.

Next, the operation when the processing is executed based on the control program written in this way will be described with reference to the flowchart in FIG. First, when the operation is started, first in step 30, the first control step is read from the step area of the memory 8. Then, it is checked whether or not the time domain is a control stop command, that is, "---" (step 31). If this is "---", it is necessary to interrupt and terminate the control thereafter, so skip to step 32, but if not, proceed to step 33 to start counting the step time of that time domain. . Then, in step 34, the output unit 9 is driven to perform the control operation of the controlled object 4, and in step 35, the counting of the step time is completed, and if not completed, the same operation is repeated.
If the count is incremented in step 35, step 36
Proceed to and check whether the step currently controlled is the final step. If it is the final step, it means that all the processing has been completed, so proceed to step 32 to carry out the ending processing, and if it is not the final step, increment the step counter (step 37) and then perform other processing. Return to step 30. With this control, when the control stop command is written in step S02 as shown in the memory map of FIG. 3, the normal operation is performed only in steps S00 and S01 as shown in the control pattern of FIG. When the operation is performed and step S02 is reached, the process is immediately ended. When the control is repetitive control, steps S00 and S01 are repeated.
Here, the CPU 7 achieves the function of the determination means for determining whether or not the control stop instruction is stored in the control step stored in the memory 8 and the control step for the next control in steps 30 and 31.

On the other hand, the writing of link data and the correction thereof are performed according to the flowchart shown in FIG. That is, when the operation is started, at step 40, the key is pressed, and if the key is pressed, the process proceeds to step 41 to check whether the key is a numerical key. If this is a numeric key, the data is stepped, and if it is not a numeric key, the other keys are processed.
Here, it is assumed that the numerical key has a relatively small number of banks provided in the memory 8 and the numerical key is used as it is to input the control stop command "-". For example, if the bank N is 4, the control stop command "-" is displayed when the nonexistent bank 5 is displayed by continuously pressing the numerical control keys "↑" and "↓" for raising and lowering the parameter. . The bank control stop command may be input by using the "END" key as in the step stop command. In this way, the data is stepped, or the other key is processed in step 43, and then it is checked whether or not the next key to be pressed is the "WRITE" key (step 44). If this is not the "WRITE" key, proceed to step 40 and repeat the same processing to
If it is the "E" key, the writing process is performed in step 45, and then another process is performed and the process ends. In this way, a link data write command and a bank control stop command are input.

In the memory map example shown in FIG. 3, banks 1, 2, 1, 3
.. shows a state in which "-" is written in the portion of bank 3 in a series of link data up to bank 4. When executing a program based on such link data, the first bank is executed first as in the step processing in each bank shown in FIG. 6, and the bank of the next read link data becomes "-". Check if
If it is not "-", the process for the next bank is continuously performed, and if it is "-", the process is ended. Therefore, in the case of the link data shown in FIG. 3, after the processing of bank 1, bank 2, and bank 1 is performed as shown in FIG.

Although "---" or "-" is used as the control stop command in the present embodiment, it goes without saying that any character can be selected as long as it can be distinguished from a numeral.

Further, although the present embodiment has been described with respect to the program temperature adjusting device, the present invention is not limited to this and can be applied to various program controlling devices.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a program temperature control device showing an embodiment of the present invention, FIG. 2 is a diagram showing front panel surfaces of a setting unit 2 and a display unit 3, FIG. 3 is a memory map of a memory 8, FIG. 4 is a flow chart showing a step data write process in each bank, FIG. 5 is a control pattern thereof, and FIG. 6 is a flow chart showing a program execution process thereof.
FIG. 7 is a flow chart showing link data writing and correction processing, and FIG. 8 is a diagram showing the processing sequence. 1 ... Temperature control device, 2 ... Setting part, 3 ... Display part, 4
...... Control object, 7 ... CPU, 8 ... Memory

Claims (3)

[Claims] 1. A program control device for temporally controlling a controlled object according to a predetermined control program, storing a user program comprising a series of control steps having set data and control time data at the set value. Storage means, input means for inputting each step data and control stop command during control to the user program area of the storage means, detection means for detecting measured information in the controlled object, and output for performing control operation on the controlled object Means, a determining means for determining whether or not a control stop command is stored in the control step for performing the control from the control step stored in the storage means, and based on the measured information obtained from the detecting means. While controlling the controlled object by driving the output means according to the user program of the storage means, Serial determination section program control apparatus characterized by comprising a control means for stopping the process when the control stop instruction is detected from. 2. The storage means has a plurality of bank areas consisting of a series of steps and a link data area for storing a combination of the banks, and the input means is a link data area of the storage means. A control stop command for each bank is input, and the determining means determines whether or not the control stop command is stored in the bank of the link data to be controlled. A program control device according to claim 1. 3. The program controller according to claim 1, wherein the program controller is a temperature controller.