1 FUNCTIONS
1.8 Safety Communication Function
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Precautions
• This function may detect an error and stop safety communications if the data link is reconfigured during safety
communications.
• If an error occurs in safety communications, safety data from the station with an error is cleared.
• A safety connection between the master station (safety station) and local station (safety station) or between local stations
(safety stations) can be established only while baton bass is performed after configuring "Safety Communication Setting"
under "Application Settings" of both stations (sending side and receiving side). The baton pass status can be checked in
'Baton pass status of own station' (SB0047).
• A safety connection with the remote device station (safety station) can be established only while data link is performed after
configuring the "Safety Communication Setting" under "Application Settings" of the master station. The data link status can
be checked in 'Data link status of each station' (SW00B0 to SW00B7).
• Note that stations not set in "Network Configuration Settings" under "Basic Settings" of the master station (safety station)
and reserved stations cannot establish a safety connection.
• Safety communications cannot be performed among the RJ71GF11-T2 set in the same control CPU.
• This function may detect an error and stop safety communications if a parameter is written to the control CPU of the
RJ71GF11-T2 during safety communications.
Safety station interlock function
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.
Create a program which releases the interlock by using Interlock release request for each safety connection to release the
safety station interlock state.
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.
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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)
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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)
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