JPS6055404A - Program controller - Google Patents

Abstract

PURPOSE:To rewrite a program during control by controlling a controlled system in a mode of a changeover switch according to a specific program on the basis of detection data from the controlled system. CONSTITUTION:A temperature controller 1 is provided with a set key 2 for setting a control step of temperature, etc., a key 3 for intermitting a control output, and a display device 4 for displaying control parameters, etc. The temperature of the controlled system 5 is detected by a sensor 6 and supplied to a central arithmetic device 8 through an A/D converter 7 to perform programmed control over the controlled system 5 according to an arithmetic processing procedure stored in a memory 9. The key 3 is a switch for switching between an operation and a stop mode; when this is set at the run mode position, the controlled system 5 is driven and when at the stop mode position, control output processing is completed. Interruption processing, e.g. program input and alteration of contents are performed during the processing when the set key 2, etc., is depressed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a program control device that temporally controls a controlled object according to a predetermined control program.

Prior art and its problems In a program control device such as a program temperature control device, a controlled object is temporally controlled according to a control pattern set in advance. However, when changing or writing the control program, the control operation has to be performed after the first step. For example, this can be done as a hold state in which the output remains as it is and time stops, or in a hold state where only the contents of the memory are retained while the power is turned off and controls such as input and alarm monitoring are stopped and the program is written. It was composed of For this reason, for example, in a temperature control device, there is a problem in that the temperature inside the program may drop, which adversely affects the controlled object.

Purpose of the Invention The present invention solves the problems of the conventional program control device, and provides a program control device that allows rewriting of the program during control and can stop outputting as necessary. It provides:

Structure and Effects of the Invention The present invention is a program control device that temporally controls a controlled object according to a predetermined control program, and includes a storage means for storing a control program, and information to be measured on the controlled object. A detection means for discharging liquid, an output means for performing control operations on a controlled object, a changeover switch for switching between an operation mode in which time program control is advanced, and a stop mode in which only time counting and discharge control are stopped, and a mode of the changeover switch. The present invention is characterized by comprising a control means for controlling a controlled object according to a predetermined program while driving an output means based on detection data obtained from the detection means based on the above.

According to the present invention having such characteristics, it is possible to rewrite a program while performing control operations. Also, when rewriting the program or when it is necessary to temporarily stop the control operation in order to perform some operation on the controlled object, it is possible to stop the progress of the control time and the output, so the state of the controlled object can be stopped. Moreover, it is possible to flexibly respond to program rewriting, and it is possible to provide an easy-to-use program control device.

DESCRIPTION OF THE EMBODIMENTS FIG. 1 is an overall configuration diagram of a programmable temperature joint device showing an embodiment of the present invention. In this figure, the temperature control device 1 includes a setting key 2 for setting temperature control steps and various control parameters, and an rRUN-3T for intermittent control output.
OPJ key 3. A display section 4 for displaying parameters and the like at the time of setting is also provided. Further, a sensor 6 is provided on the controlled object 5 to detect its temperature, and an A/D converter 7 is provided to convert the sensor output into a digital quantity and input it, and the output is sent to a central processing unit (hereinafter referred to as CPU) 8. given to. The CPU 8 performs program control of the controlled object 5 via an output section 10 consisting of a heater, a motor, etc. in accordance with arithmetic processing procedures stored in a memory 9. Also CP
U8 includes an alarm output unit 11 that issues an alarm when there is a difference of more than a predetermined value between the set temperature and the temperature detected by the sensor.
is connected.

FIG. 2 shows the front panel surface of the program temperature mk1 device used for the display section 4 and setting section. In this figure, the rRUN-3 TOPJ key 3 is a switch for switching between the operation mode and a stop mode that stops the progression and output of time, and the r-J and r-J keys Numerical control key to lower
The ↑" and ↓ keys are numerical control keys that increase and decrease the value of the parameter, respectively, and rWRITE/NEXTJ
The key is the key to set display data, store it in the memory 9, and move the setting operation to the next step, and the rATJ key is the key to set appropriate general-purpose values when it is not necessary to set the control parameters strictly. Yes 5. The rENDJ key is a key for interrupting program settings midway through.

Further, Pv of the display section 4 is a display that shows the current value, and S■ is a display that shows the cent value.

5TEP is an indicator showing the step number.

Next, the operation of the program temperature control device will be explained with reference to a flowchart. In the flowcharts below, numbers indicated using leader lines indicate processing routines or operation steps of the CPU 8. FIG. 3 (al) is a flowchart showing the overall operation of this program temperature fA node device.

In this figure, when the power is turned on, initialization processing is first performed in routine 20, and it is checked whether it is in the program write mode (step 21). If it is in the write mode, the program is written in routine 22, and then the program status is displayed on the display section 4 in step 23.

The program then proceeds to routine 24 to execute the program. First, in step 31, as shown in FIG. 4, it is checked whether the rRUN-3 TOPJ key 3 is in the run mode.
The program proceeds to step 1.32 to count the step time and advance the step, and if the mode is in stop mode, the program proceeds to step 33 without performing the processing in step 31.32 to read various execution parameters and perform this step. End the subroutine. Then, return to step 25 and control target 5
Input processing of temperature data obtained from the sensor 6 and the A/D converter 7 is performed. Further, the process proceeds to step 26, and if necessary, the alarm output unit 11 outputs an alarm according to the temperature data, and the process proceeds to routine 27, where control output processing is performed. As shown in FIG. 5, the control output is calculated in step 40, and the process proceeds to step 41, where rRUN is
-3 Check whether TOPJ key 3 is in run mode. If this is the run mode, the controlled object 5 is driven via the output unit 10, and if it is not the run mode 1'' but the stop mode, the output is turned off and the control output process is ended. Then, the process returns to step 21 and the same process is repeated. If the setting key or rRUN-3 TOPJ key 3 is pressed during such processing, the screen shown in Fig. 3 (b
) is performed. This is the process of inputting a setting key, for example, program input, in the routine 28, and reading the ``RUN-STOP'' key 3 to change the program contents of the memory 9.
When the processing is completed, the process returns to the original routine shown in FIG. 3(a).

FIG. 6 is a diagram showing control pattern A of the program stored in the memory 9. When performing such program control, as shown in FIG.
If the TOPJ key 3 is set to the stop state, the output is turned off as shown by the broken line B in FIG. 7, and the actual temperature of the controlled object 5 gradually decreases. At this time, since time has stopped progressing, the control pattern is extended in the time domain as shown in FIG. Then, if the run mode is returned to at time L2, control is thereafter performed in a pattern similar to the control pattern shown in FIG. 6.

Similarly, if the stop mode is set at time t3, the temperature will drop again, and if it is returned to the stop mode at time t3, the original program control will be restored.

Although this embodiment has been described with respect to a program temperature control device, it goes without saying that the present invention can be applied to various other program control devices.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram of a programmable temperature control device showing an embodiment of the present invention, Fig. 2 is a view showing the front panel surface of the setting section and display section, and Fig. 3 is a diagram showing the entire structure of the temperature control device. 3 (bl is a flowchart showing interrupt processing, FIGS. 4 and 5 are flowcharts showing subroutines of program execution processing and control output processing, and FIG. 6 is an example of a control program pattern. Figure 7 shows rRUN during program control.
-3 It is a figure which shows the control fffll pattern when TOPJ key 3 is operated. 1------1 Temperature adjustment device 2-----General setting key 3--r RU N -S T OP J key 4
------Display section 5---Controlled object 13---C
PU Riichi---Memory patent applicant Tateishi Electric Co., Ltd. Agent Patent attorney Tatsuyoshi Okamoto (and 1 other person) Figure 1 Figure 21"1 Figure 3 Ca) Figure 3 (b) Figure 4 Figure 5 Figure 6

Claims (2)

[Claims] (1) In a program control device that temporally controls a controlled object according to a predetermined control program, a storage means for storing a control program, a detection means for detecting measured information in the controlled object, and a control device for controlling the controlled object. output means for performing the operation; a changeover switch for switching between an operation mode in which time program control is advanced and a stop mode in which only time counting and output control are stopped; and a detection obtained by the detection means based on the mode of the changeover switch. A system 01 for controlling the control object according to a predetermined program while driving the output means according to data.
1. A program control device comprising: 1 means. (2) The program control device according to claim 1, wherein the program control device is a temperature control device.