Mitsubishi Electric MELSEC iQ-R Series - Page 19

2 APPLICATION EXAMPLE
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Safety control for the entire line using multiple safety programmable controllers
The following shows an application image for the safety control linked between multiple manufacturing processes, as an
application example of the safety programmable controller. The safety programmable controller processes controls linked
between safety control and standard control at each process, and control processes. All processes should share safe state
information from each process when connecting multiple manufacturing processes without physical separation. Share safe
state information between safety programmable controllers allocated in each process, using safety communication functions
between Safety CPUs.
Configure the safety application operated by the safety programmable controller for the following purposes:
• When the safe state signal is checked, supply power to the robots.
• When safe state signal cannot be checked, cut off the power.
• The safe state signal can be checked using an emergency stop switch or a light curtain.
• Configure the safety control linked with consecutive processes or the entire process using safety communications between
Safety CPUs on the CC-Link IE Field Network.
The safety application operated by the safety programmable controller operates as follows:
• Connect a safe state signal to the safety remote I/O module.
• Connect the Safety CPUs at each process with the CC-Link IE Field Network.
• The safety remote I/O module sends the safe state signal to the Safety CPU.
• To perform emergency stop for consecutive processes or the entire line, send an emergency stop request to the Safety
CPUs installed in the consecutive processes or the entire line through safety communications between Safety CPUs in CC-
Link IE Field Network using the program.
• The Safety CPU processes the safe state signal received from the safety remote I/O module and an emergency stop
request received by safety communications of the CC-Link IE Field Network using the safety program. Then it sends a
safety output to the safety remote I/O module.
• The safety output cuts off the power to the robots.
The standard application operated by the safety programmable controller operates as follows:
• Connect restart switch, inverter, and robot to standard remote I/O module.
• Deliver input of connected restart switch to safety application.
• Perform communications to check operation status and operation instruction with inverter and robot.
• When a link is required for standard control of multiple or the same processes, send standard data through standard
communications of the CC-Link IE Field Network.
First process
Second process
nth process
CC-Link IE Field Network (standard communications + safety communications)
Standard control
Safety control
Standard control
Safety control
Standard control
Safety control
Emergency
stop switch
Light
curtain
InverterRestart
switch
Robot
Inverter Robot
Emergency
stop switch
Light
curtain
InverterRestart
switch
RobotEmergency
stop switch
Light
curtain
InverterRestart
switch
Robot