Safety User Devices - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

Safety user devices

This section describes the safety user devices.
Safety input (SA\X)
Safety inputs are used to give instructions or data to the Safety CPU with external devices such as emergency stop buttons,
safety plugs, door switches, and light curtains.
Safety output (SA\Y)
Safety outputs are used to output safety program control results to external relays, contactors, robots, and motion, etc.
When the status changes from STOP  RUN, the value immediately before the RUN status is retained, and the value is
updated the moment safety cycle processing is executed for the first time after changing to the RUN status.
Safety program
ON
OFF
SA\X0
OFF
SA\Y0
: Safety cycle processing start
(1) Turns on when safety communications are received.
(2) Turns off when safety communications are received.
(3) SA\Y0 turns on when SA\X0 turns on in the safety program.
(4) SA\Y0 turns off when the status of the CPU module is switched to STOP.
(5) The value is maintained when the status changes from STOP  RUN.
(6) Turns on when a safety program is executed.
Safety internal relay (SA\M)
This device is used as an auxiliary relay within the Safety CPU. The following operations for the Safety CPU turn off all safety
internal relays.
• Powering off and on
• Reset
Safety link relay (SA\B)
The safety link relay is used as a device when sending and receiving safety data between Safety CPUs over CC-Link IE Field
Network.
■Refreshing network modules using safety link relay
Data is sent and received between Safety CPUs. The safety communications send/receive device range is set in the CC-Link
IE Field Network safety communication settings. Locations that are not used for safety communications send/receive devices
can be used for other applications.
RUN → STOP STOP → RUN
(1)
(2)
ON
(3) (4) (5)
(1)
ON
ON
(6)
34 SAFETY DEVICES, SAFETY LABELS, AND CONSTANTS
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34.1 Safety Devices
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