Omron FH series User Manual page 469

Setting communication module input states
Permits/prohibits input to communication modules.
Any communication module whose input state is set to Prohibit (0) accepts no communications
whatsoever. However, inputs related to hardware (parallel STEP signals/DSA signals and ECAT STEP, etc.) are
not included in the prohibition.
<Command format>
or
3
<Response format>
When processing is performed normally
When processing is not performed normally
(Example)
Setting the serial (RS-232C/422) input state to prohibited
<Command>
C
I T S 1 0
R
<Response>
467
Vision System FH/FZ5 Series User's Manual Command Control
for Communications Settings (Z342)