Siemens SIMATIC TIWAY 1 - Manual (Page 153)

HOST COMMAND SET REFERENCE
UNILINK HOST ADAPTER 5–68
USER MANUAL
5.7.1 Modify External Output Status — FC
The MODIFY EXTERNAL OUTPUT STATUS command controls the external
output point provided by the UNILINK Adapter.
Command: FC cc
Response: FC
Parameters:
cc Output status action:
00 = Turn the output off.
01 = Turn the output on.