(receiver): [<Main PLC>:<Safety PLC>:Safety Logic

the PLC and control

the device as a PLC

the fist time the S-PLC [...] arise when the S-PLC

When exchanging the PLC

reset when the S-PLC [...] is allowed when the S-PLC [...] reset when the S-PLC

in the case of multi-PLC

for this safety PLC

the fist time the S-PLC [...] occur when the S-PLC

, then the status of the S-PLC