Siemens SIPLUS HCS Operating Instructions Manual page 107

I/O module PM:
In the event of a firmware update, new firmware is loaded into the inserted PM. After the
update, the HCS4300 restarts automatically. Only in the event of a fault, if the update has
not been correctly completed, is it necessary to restart the HCS4300.
SIPLUS HCS4300
Operating Instructions, 11/2015, A5E35452705A/002
Service and maintenance
12.2 Firmware update
107