ABB S800 I/O Manual page 66

I/O Module Functionality
Module Identity
All S800 I/O modules contains a module identity. The module identity is used to
verify that an I/O module of the expected (user configured) type is mounted before
taking it operational. It protects the system from performing unexpectedly.
Module States
The figure below shows the states of the I/O modules.
Error
From all other states:
Fatal error detected by module
OSP
Output modules only
Figure 19. I/O Module States
66
From ALL states:
Restart-Command
Commanded to
Not Configured
state
Commanded to
Operational state
Communication time-out
NOT Reset AND 5 V OK
Init
Not
Configured
Parameter loaded
Ready
Commanded to Operational state
Ope-
rational
Section 4 Operation
3BSE020926-600