JPH09272000A - Controller for press machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the machine operatable in the case of failure of part of CPU circuit by arranging a CPU circuit having at least triple redundancy. SOLUTION: When the data of data buses 2B, 3B is changed in synchronization, a data collator 5 outputs a switching signal 5A, which may connect output signals 2A, 3A from CPU circuits 2, 3 to control output 7, is outputted to an output switching device 6, as a result, the control output 7 corresponding to the signals 2A, 3A is outputted. When the data is not synchronized, the data collator 5 outputs the switching signal 5A not connecting to the control output 7, as a result, an output of the control output 7 due to the signal 2A, 3A is released, a first/second control output 7A, 7B are not outputted. Thus, when part of CPU circuit is failed if over one set of CPU circuit is normally operated, the control output to a press machine corresponding to output signal of normal CPU circuit can be outputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an output of a control device which is provided with a plurality of CPU circuits and controls the operation of a slide of a press machine.

[0002]

2. Description of the Related Art A set of (double) CPU circuits is provided, and when a data on a data bus of the CPU circuits changes synchronously, a control device for controlling a slide operation of a press machine is known. is there.

[0003]

A control device for controlling a slide operation of a press machine by a CPU circuit is composed of a plurality of CPU circuits in order to improve control reliability. In the dual CPU circuit, either CP
When the U circuit failed, the press machine was immediately inoperable until the failure was repaired. The present invention, in order to avoid the inoperability of the press machine until this failure repair,
If the CPU circuit is triple or more, and the CPU circuit of two or more is operating normally, it means that the press machine can be operated during the preparation for repair of the defective CPU circuit. Is to be the shortest.

[0004]

[Means for Solving the Problems] At least triple C
The PU circuit, the data collator, the output switcher, and the control output to the press machine constitute a control device. In the data collator, the data on the data bus of a CPU circuit is transferred to another CP.
When the data does not change in synchronization with the data in the U circuit, the output signal from the CPU circuit is disconnected from the control output, and when the data in the data bus of at least one or more CPU control circuits changes in synchronization, A control output for operating the slide of the press machine is output so that the press machine can be operated even during preparation for repair of the defective CPU circuit.

[0005]

Operation: Even if some CPU circuits fail, one or more sets of C
When the PU circuit is operating normally, the control output to the press machine corresponding to the output signal of the normal one or more sets of CPU circuits is output, so the press machine can be operated by this normal CPU circuit. Has become.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIG. Input signal 1 from the press machine is the first CPU
The data is input to the circuit 2, the second CPU circuit 3, and the third CPU circuit 4, the respective data buses 2B, 3B, and 4B are input to the data collator 5, and the first CPU circuit 2, the second CPU circuit 3, and the third CPU circuit 4 Output signal 2A, 3A, 4A
Are respectively input to the output switching device 6 and the output switching device 6
From the control output 7 to the press machine.

When the data on the data buses 2B and 3B are changing synchronously, the data collator 5 outputs the output signal 2A from the first CPU circuit 2 and the output signal 3A from the second CPU circuit 3 as a control output. Output switching signal 5A connectable to 7 is output to output switching device 6, and output switching device 6 outputs output signals 2A and 3
The control output 7 corresponding to A is output.

When the data on the data buses 2B and 3B do not change synchronously, the data collator 5 outputs the output signal 2A from the first CPU circuit 2 and the output signal 3A from the second CPU circuit 3 to the control output. Output switching signal 5A not connectable to 7
Is output to the output switcher 6, and the output switcher 6 releases the output of the control output 7 by the output signals 2A and 2B, and the first control output 7A and the second control output 7B are not output.

In the case of the output signals 3A and 3B corresponding to the data buses 3B and 4B and the output signals 4A and 2A corresponding to the data buses 4B and 2B, the data collator 5 and the output switcher 6 perform the same processing as described above. To do. In this example, triple CP
Although the case of the U circuit is shown, the same processing is performed in the case of quadruple or quintuple.

[0010]

EFFECTS OF THE INVENTION It is unlikely that a plurality of CPU circuits will fail at the same time, and if one or more sets of non-faulty CPU circuits are operating normally even during preparations for repairing the failed CPU circuit, this Since the control output to the press machine corresponds to the output signal of the normal CPU circuit, the press machine can be operated by this normal one or more sets of CPU circuits. Stop the press machine and wait for repair. Disappears.

[Brief description of drawings]

FIG. 1 shows a main control block diagram of the present invention.

[Explanation of symbols]

1 is an input signal from the press machine, 2 is the first CPU circuit,
2A is an output signal, 2B is a data output, 3 is a second CPU circuit, 3A is an output signal, 3B is a data output, and 4 is a third CP.
U circuit, 4A is output signal, 4B is data output, 5 is data collator, 5A is output switching signal, 6 is output switching device, 7 is control output to press machine, 7A is first control output, and 7B is first 2 control outputs.

Claims (1)

[Claims] 1. A control device for controlling a slide operation of a press machine, wherein the control device has at least a triple C or more.
It is composed of a PU circuit, a data collator, an output switcher, and a control output from the output switcher to the press machine. In the data collator, the data of the data bus of each CPU circuit is the other C
Depending on whether or not it changes in synchronization with the data of the PU circuit, a signal for connecting the output signal of this one set of CPU circuit and the control output or a signal for disconnecting is issued to the output switching device, and the output switching device A control device for a press machine, characterized in that, when at least one set of signals to be connected is obtained, a control output is issued to the press machine by the output signal of the obtained CPU circuit to control the slide operation of the press machine. .