Chapter2 Application Example 2 - 1 To - Mitsubishi Electric Melsec-QS Series Safety Application Manual

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APPLICATION EXAMPLE
CHAPTER2 APPLICATION EXAMPLE
The application image for the car welding line is shown as an application example of the
safety PLC in Figure2.1.
The safety application operated by the safety PLC is configured for the following purposes.
When the safe state signal can be confirmed, supply the power to a robot.
When the safe state signal cannot be confirmed, turn off the power to a robot .
Confirm the safe state signal using an emergency stop switch or a light curtain.
The safety PLC is operated as follows.
The safe state signal is connected to a safety remote I/O module.
The safe state signal is sent from the safety remote I/O module to the safety CPU module.
The safety CPU module processes the received safe state signal with the sequence
program and sends the safety output to the safety remote I/O module.
The safety output stops the power of a robot.
Integrated control panel
MELSECNET/H(10),
Ethernet, etc.
(Communication between
standard CPUs)
Line integrated control
MELSECNET/H
Safety PLC
(Safety control)
Safety remote
Standard input
Restart
Body welding line
F i r s t p r o c e s s
Line control network
Safety input
I/O module
Standard output
Emergency
switch stop switch
Figure2.1 Application image for car welding line
S e c o n d p r o c e s s
Process control CPU
Line control network
Safety input
Safety remote
I/O module
Warning Light curtain
light
n - t h p r o c e s s
Line control network
Safety remote
I/O module
Safety output
Robot Robot
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