Siemens SIMATIC TIWAY 1 User Manual page 156

HOST COMMAND SET REFERENCE
5.7.4 Reset Adapter — FF
The RESET ADAPTER command forces the UNILINK Host Adapter to execute
a hardware reset. The reset will begin within one second after the response has
been returned to the host computer. Your applications software should allow a
minimum of 2–3 seconds for the reset to complete.
Command: FF
Response: FF
5–71 UNILINK HOST ADAPTER
USER MANUAL