Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual page 125

Safety station interlock function
1
When a communication error has occurred between safety stations, communication is automatically cut to prevent incorrect
input or output from the faulty station. Safety communications between the stations becomes safety station interlock state,
and it does not resume until the safety interlock is released.
Note that standard communication automatically resumes even in the safety station interlock state if the communication error
cause is eliminated.
The safety station interlock function prevents equipment stopped by a communication error from suddenly resuming its
operation after it recovers from the error.
■Checking method
Check the status with the safety special register 'Interlock status of each safety connection (1st module)' (SA\SD1232 to
SA\SD1239).
For the safety special register for the second or later modules and its operation details, refer to the following.
 MELSEC iQ-R CPU Module User's Manual (Application)
■Release method
Release the interlock using the safety special register 'Interlock release request for each safety connection (1st module)'
(SA\SD1240 to SA\SD1247).
For the safety special register for the second or later modules and its operation details, refer to the following.
 MELSEC iQ-R CPU Module User's Manual (Application)
Wiring precautions
Refer to the following for the wiring precautions.
Page 123 Wiring precautions
1 FUNCTIONS
123
1.8 Safety Communication Function