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(2) Setting method
Assign devices to be used for safety communication in the safety communication setting.
( Page 90, Section 7.6)
Devices used for safety communication are highlighted in yellow or green in ladder programs on GX Developer.
( GX Developer Version 8 Operating Manual (Safety Programmable Controller))
The following figure is an example of a ladder program with a device highlighted in yellow.
● If an error occurs in safety communication, safety data from a station with an error is cleared.
● A safety connection can be established only while baton bass is performed after configuring the safety communication
setting of both stations (sending side and receiving side).Note that stations not set to the network configuration setting of
the master station and reserved stations cannot establish a safety connection. Check whether a safety connection is
established or not at special registers (SD1420 to SD1427) (Safety refresh communication status of each safety station)
and a special relay (SM1421) (Safety refresh communication status of safety master station).
( QSCPU User’s Manual (Function Explanation, Program Fundamentals))
● The following data can be held only when the safety CPU mode is set to the test mode: output data of safety
communication when the safety CPU module is on the STOP status. ( Page 115, Section 8.2.6)
Highlighted in yellow