JPS62259104A - Sequencer - Google Patents

Abstract

PURPOSE:To interrupt the run of a program and to perform easy correction when an error occurs by adding a temporary stop instruction mode to a mode switch of a program console of a sequencer. CONSTITUTION:A temporary stop instruction mode 6a is provided to a mode changeover switch 6 of a program console which forms a sequencer together with a base unit containing an input/output relay, an auxiliary relay, a contact, etc. Then the mode 6a is selected by the switch 6 in case such an error is detected that a sequence circuit does not work as prescribed in a sequence execution mode. Thus a running program is interrupted and held as it is. Under such conditions, the switch 6 is changed over to a program mode 6c for writing with input of a new instruction. Thus the wrong instruction is cleared and the new instruction is stored in a memory. In such a way, the running program is interrupted and the error can be easily corrected.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field).

The present invention relates to a sequencer, and more particularly, to a sequencer having a function of easily modifying a program that instructs a 411F to operate a relay, etc.

(Prior Art) A sequencer consisting of a pace unit that is equipped with input/output relays, auxiliary relays, etc. and stores a program therein, and a program console that instructs each of the relays to perform predetermined operations has not been put to practical use as a programmable controller. has been done.

That is, a memory area corresponding to a large number of relays (relay number) K [the operation (ON 5 OFF) of each relay is stored, and a designated relay among the above relays is stored separately according to the order of command words. Sequencers with input/output devices to be operated are used, for example, in automatic elevators, automatic washing machines, and the like. However, whether or not this type of sequencer can execute each stray input/output device according to preset conditions depends on whether or not a predetermined program program is accurately written for each specified relay. In this way, a program program that instructs a predetermined relay operation is written by operating the program console (program mode), and then the program is checked or operated (operation mode) to confirm whether the operating status of each designated relay is correct or incorrect. There is. However, in the above-mentioned operation execution (monitoring), if an error is discovered and corrected in the program that instructs the relay operation, it is stored in the base unit and the control operation is performed while executing the program (from start to end). First, proceed to the inconvenient part of the sequence circuit (the part that causes an inconvenient sequence).

It is modified by means such as "change", "deletion", "insertion", etc. In other words, the above modification first sets the mode changeover switch to program mode, and then changes the command word or relay honor code to "program mode."
In the case of "Change", the operations are carried out in the following order: clear, 4fl search for correct command word, clear 1 display, hit the target command word, and include the new command word. In addition, when performing "delete" or "insert", clear, search for output command, display 1 display of the command to be deleted (inserted), delete (write/insert insert command), previous command confirmation (confirmation of next address) each time.

Therefore, it is not only complicated to modify the program, but also requires a long time.

(Problems to be Solved by the Invention) The present invention deals with the above-mentioned circumstances and when it is desired to modify a program, the necessary modifications are made while the program is stopped midway, and after the modifications, the program continues to run and the sequencer functions This makes the sequencer easier to use.

[Structure of the invention]

(Means for Solving the Problems) The present invention is characterized in that the main body of the sequencer is equipped with a function of a mode changeover switch (temporary stop command mode) in addition to a program mode, a ram mode, an operation mode, etc.

(Function) The sequencer according to the present invention is particularly equipped with a function of stopping program execution midway (temporarily). However, when the mode selector switch is changed from operation mode to pause mode, the execution of the sequence (program) is interrupted.
After correcting the inappropriate part of the program, when switching to the operation mode again, execution of the sequence from the point at which it was interrupted (stopped) will continue. That is, it is no longer necessary to repeat the sequence every time a correction is made.

(Example) Figure 1 is a front view (operation panel section) of a sequencer according to the present invention.
For example, "logical start".

Display section (1) that displays the execution status of commands such as "output", error display section (2), address/data display section (3), operation section (4), relay number list, etc. (5) )
In a sequencer equipped with a mode changeover switch (6), the mode changeover switch (6) is further provided with a temporary stop command mode (6) as a changeover mode.In other words, the sequencer according to the present invention teeth,
When a predetermined program is being executed (operation mode (6b) L) and the mode changeover switch (6) is switched to pause mode (6), the program (sequence circuit) being executed is interrupted.

It is configured to perform a holding function.

When executing (monitoring) a sequence circuit formed by performing the necessary programming on the sequencer, discovering any inconveniences in the sequence circuit, and making corrections, the mode selector switch (6) is set to the temporary stop command mode. 6a), and after making necessary corrections, when the mode selector switch (6) is again switched to the operation mode (6b), the sequence circuit is executed (monitored) from the point of interruption.

Regarding the present invention, a flowchart (Figure 2) showing a program for switching the mode of the program console and a flowchart (Figure 3) showing a program for switching to the pause mode (6) and making necessary program corrections are shown below. ) will be further explained.When the sequencer is in operation mode (6b), the preset sequence circuit (program) is as desired (as specified).
If an error is found in the sequence (instruction) while checking whether or not the operation is being performed, the mode changeover switch (6) is switched to the temporary stop command mode (6a). By switching to the temporary stop instruction mode (6a), the program that has been executed while searching for an address-knowing instruction is interrupted, and the interrupted state is maintained.

The program is thus suspended, the mode selector switch (6) is switched to program mode (6C) K, the erroneous instructions found above are deleted, and a new instruction is input in its place, displayed, and after confirmation, writing is performed. . During this time, the system program clears the erroneous instruction, searches for a new instruction, and stores it in memory at a predetermined address in its place.
Accordingly, a predetermined portion of the sequence circuit is modified and stored as a program in the base unit.

That is, when switching to the above-mentioned temporary stop command mode (6a).

Since the program that was being executed is interrupted and the interrupted state is maintained, the necessary corrections can be made to the program without the need for operations such as searching for command words that require further correction. When the operation mode (6b) is switched again, the program continues to be executed from the above-mentioned interruption point (correction point). However, this program modification can be similarly carried out at the stage of continuing execution of the program after the modification.

In this way, when a program is modified while the program is running,
What you can do by keeping execution suspended as appropriate is:
Conventionally, for example, when changing (correcting) a relay number, it is much more complicated than the process of repeatedly running the program from the start to the part to be corrected and then making the necessary corrections one by one. reduce In the above embodiment, the mode changeover switch on the program console is a dial type switch, but it may also be a button type switch.
Further, in the case of this Bush type, the positional relationship between each instruction mode is not restricted.

〔Effect of the invention〕

In the sequencer according to the present invention, a temporary stop mode switch is particularly attached to the mode changeover switch. However, the lever pause mode changeover switch has the function of interrupting the program that has been executed in the operation mode at any point according to the program stored in advance in the pace unit of the sequencer, and maintaining this interrupted state. . Therefore, if an error or inappropriate portion is found in the program (sequence circuit), execution of the program can be interrupted and necessary corrections can be easily made. Being able to immediately modify a program during the execution (monitoring) stage in this way simplifies operation and handling in the practical use of this type of sequencer, and in particular, shortening the time required for modification brings many benefits. I can say that.

[Brief explanation of drawings]

FIG. 1 is a front view showing a sequencer according to the present invention. FIG. 2 is a flowchart showing an overview of a mode switching program for a sequencer according to the invention, and FIG. 3 is a flowchart showing an overview of a program in a pause mode of a sequencer according to the invention. (6): Mode changeover switch, (Sa) Temporary stop mode. (6b): Operation mode I (6C) Niprogram mode. Agent Patent Attorney Noriyuki Chika Figure 1

Claims (1)

[Claims] 1) In a sequencer comprising a base unit equipped with input/output relays, auxiliary relays, contacts, etc., and a program console that instructs each relay of the base unit to perform a predetermined operation, mode switching of the program console A sequencer characterized in that a switch is provided with a temporary stop command mode that has a function of interrupting and holding a program being executed. 2) The sequencer according to claim 1, wherein the mode changeover switch of the program console is a dial type, and a temporary stop command mode is provided between the program mode and the cassette mode.