JPS59160208A - Program controller - Google Patents

Abstract

PURPOSE:To detect easily a program error, and to execute a control with high reliability by basing on a program controller of a digital program system, adding a recording function to said controller, and recording an analog set value output. CONSTITUTION:A program controller part PCON has a keyboard KEY for inputting a program of a set value, an indicator DIS for displaying it, a memory RAM for storing the program, and a program generating circuit PRO for executing an operation processing, generates a control output Sc through a controlling circuit and an outputting circuit, also inputs a measuring signal Sm from a controlled system by a measuring circuit, and controls it. Also, a recording part REC controlled by the program generating circuit PRO is provided, and not only the measuring signal Sm but also a set value output from the program generating circuit PRO are recorded on a recording paper CHA.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a program controller that performs control according to preprogrammed setting values and is capable of recording program patterns and measured values indicating the control status.

In general, program controllers that programmatically control batch systems such as electric furnaces include analog program type controllers that draw the program as an analog pattern on program paper and obtain set values by tracing and reading this program pattern. A digital program method has been put into practical use in which setting values are obtained by inputting digitally using a keyboard or the like and calculating and processing this digital signal.

However, each of these devices has the following drawbacks. First, in the former analog program type program controller, the program pattern must be read when generating set values, so the reliability of the control may decrease depending on the quality of the reading means. For example, when a program pattern made of a conductive film is read using a contact, the reliability of the contact becomes an issue. In such a case, problems such as the density of line writing, a piece of program paper, or the influence of external light may arise. on the other hand,
In the latter digital program type program controller, the setting timing is determined through arithmetic processing, so there is no problem with reading accuracy as described above, and high-precision control can be performed. Since it is stored in a memory device, its contents cannot be intuitively grasped as a program pattern, and programming errors etc. cannot be easily discovered. Furthermore, during control operations, only the set values at the time are displayed, so it is not possible to easily know the progress of the program.

The present invention eliminates the above-mentioned drawbacks of the conventional device, makes it possible to intuitively understand the contents of a program, easily discover program errors, and performs highly reliable control. The purpose is to realize a program controller with a simple configuration.

The program controller of the present invention is based on a digital program type program controller, and has a recording function (-1 added to it), and also has a recording function (-1).
This allows the programmed contents to be recorded on recording paper as analog setting value output, and by converting the program contents stored in the form of digital signals into analog program patterns and recording and displaying them. The present invention has realized a program controller that allows the user to intuitively grasp the program contents, facilitates the discovery of program errors, and performs highly reliable control.

Hereinafter, the program controller of the present invention will be explained using the drawings.

The figure is a configuration diagram showing an embodiment of the program controller of the present invention. In the figure, PCON is a program controller section, and REC is a recording section. In the program controller section PCON, KEY is the keyboard for inputting the setting value program, DIS is the display that displays the setting values, time, measured values, etc., and RAM is the keyboard K.
Memory that stores programs input from EY,
PRO follows the program stored in memory RAM,
A program generation circuit that performs arithmetic processing and sequentially generates a set value output Ss, CON is a control circuit that controls the controlled object according to the set value output Ss generated by the program generation circuit PRO, and OUT is connected to the next stage of the control circuit COH. and an output circuit that supplies the control output Sc to the controlled object, an MES
takes in the measurement signal Sm from the controlled object and sends the control circuit C
This is a measurement circuit that supplies ON.

Further, the recording section REC has a plurality of recording pens and also has a recording paper rewinding function, and various operation modes are controlled by the program generation circuit PRO. In the recording section REC, CIA is recording paper. Recording part R
In addition to the measurement signal Sm, the EC also includes a program generation circuit PR.
A set value output Ss is applied from O, and the first
Then, recording is performed by the second recording pen. Further, the up/down of the recording pen and the feeding speed of the recording paper are controlled by a control signal Sd from the program generation circuit PRO.

In the program controller of the present invention configured as described above, its operations can be roughly divided into the following three types.

(1) Program write operation (2) Program check operation (3) Control operation First, in the program write operation, when setting values, time functions, etc. are input from the keyboard KEY, these are stored in the memory RAM as a series of control programs. be remembered.

Now, when writing of the control program is completed, it is necessary to check whether this control program has been input correctly. Here, the control program is checked by reading the contents of the control program stored in the memory RAM by the program generation circuit PRO, converting it into an analog setting value output Ss, recording it in the recording section REC, and using this recording result. It is done. That is, the program generation circuit PRO reads a control program from the memory RAM, and performs arithmetic processing according to this program.
The generated set value output Ss is applied to the recording section RFC to perform recording. The recording unit REC outputs this setting value Ss @
Record using No. 1 recording pen. At this time, the program generation circuit PRO generates the set value output Ss in a short time, and also sets the recording paper feeding speed of the recording section REC to be faster accordingly, thereby recording the set value output Ss in a short time. Therefore, the control program stored in the memory RAM is recorded as a program pattern on the recording paper CHA, and by looking at the recorded result, the program contents can be intuitively understood, and programming errors can be easily avoided. can be discovered.

As described above, transfer the program pattern to the recording paper CHA.
After recording on the recording paper C) and checking its contents, the program generation circuit PRO causes the recording section RFC to perform a rewind operation onto the recording paper C)I, and aligns the recording start position with the start point of the program pattern. This is to cause the measurement signal Sm to be recorded over the program pattern during the control operation described below. In this way, by aligning the recording start position with the start point of the program pattern, the control flow will adjust and the set value output Ss and measurement signal Sm
It is possible to easily know the relationship between the two and the progress status of the control.

Now, during control operation, the program generation circuit PR
O generates a set value output Ss in accordance with real time, and the control circuit CON receives this set value output Ss, and generates a control output Sc while comparing the set value output Ss with the measurement signal Sm, and outputs the control target. control. At this time, the recording section REC adjusts the recording paper feeding speed to the time scale of the previously recorded program pattern, and records the measurement signal Sm with the second recording pen. Here, since the measurement signal Sm is recorded over the program pattern as described above, the control state can be easily known.

In this way, the program controller unit PCON and the recording unit RRC are combined, and the content of the control program stored in the memory RAM is used as a program pattern to be printed on the recording paper CH.
If AJ- is recorded, the contents of the control program can be intuitively grasped, and program errors can be easily discovered.

Furthermore, since the program controller unit PCON is a digital program type controller, it is possible to perform highly accurate and highly reliable control as described above.

In the explanation with "=", after recording a program pattern with the first recording pen of the recording section RFC and rewinding the recording paper CIA, the measurement signal Sm is recorded with the second recording pen superimposed on this program pattern. Although the case where the recording section REC is recorded is shown as an example, the usage of the recording section REC is not limited to this, and as long as the program pattern can be recorded independently when checking the control program,
For example, after rewinding the recording paper CI (input), the measurement signal S
It is also possible to record the set value output Ss with the first recording pen again at the same time as m, and trace the program pattern as the control operation progresses. In this way, during normal operation, the first recording pen always records the same program pattern as the previous 9-program pattern, so it is possible to easily check changes in set values during control.

Also, the check of the control program is completed and the measurement signal S
If it is not necessary to write m over the program pattern, the measurement signal Sm and the setting and other outputs Ss may be newly recorded simultaneously without rewinding the recording paper C)IA. Further, the recording unit REC is not limited to a multi-pen type recording device, but may be, for example, a multi-stylus dot recording device.

As explained above, the program controller of the present invention is based on a digital program type program controller, and has a recording function (-1 added to it), and after the program ends, the programmed contents are output as analog settings and other outputs. Since the program is recorded on recording paper, the program contents stored in the form of digital signals can be converted into analog program patterns and recorded and displayed, making it possible to intuitively understand the program contents.
10- It is possible to realize, with a simple configuration, a program controller that can understand the program errors, easily discover program errors, and perform highly reliable control.

[Brief explanation of the drawing]

The figure is a configuration diagram showing an embodiment of the program controller of the present invention. PCON...Program controller section, REC self/recording section, DIS...Display unit, KEY...
Keyboard, RAM...Memory, PRO...
Program generation circuit, CON...Control circuit, OU
T: Output circuit, MES: Measurement circuit, C
HA...recording paper. 11-50-

Claims (2)

[Claims] (1) It is equipped with a program controller section using a digital program method, and a recording section in which the recording paper feeding speed, recording pen selection, etc. are controlled by the program controller section, and the recording section receives measurement signals and the program controller section A program controller configured to record generated setpoint outputs simultaneously or separately. (2) The recording section has a recording paper rewinding function, and the measurement signal and setting value output are recorded by first recording the setting value output, then rewinding the recording paper to the recording start position, and starting from that position, the measurement signal and setting value output are recorded. The program controller according to claim 1, wherein the program controller starts recording.