6. Series 8 I/O
Configuration
6.6. Defining Channel blocks
R500
Series 8 I/O User's Guide
175
April 2017
Honeywell
Table 44 FAULTOPT parameter settings
Operating
mode
Description
Analog Output
channels
Digital Output
channels
Hold
Holds output at last
good value
Applicable to all
configurations
Applicable to all
configurations.
Unpower
Output goes to an
unpowered value
Applicable to all
configurations
Applicable to all
configurations.
Power
Output goes to a
powered value
Not applicable
to Analog
Output channels
Not applicable to
Digital Output channels
for PWM operation.
Use Fault
Value
Output goes to the
value specified by the
FAULTVALUE
parameter
Not applicable to
Digital Output channels
configured for
STATUS, ONPULSE
or OFFPULSE
operation.
The FAULTOPT configuration also defines the state of the output in case of total IOM
hard failure also. This feature is mainly applicable to the Digital Output channels
configured for STATUS operation.
FAULTED state and IOM hard failure
Total IOM hard failure indicates:
dual IOM failure in the case of redundant setup
assumes that there is no disruption 24V power to the I/O modules
The following table summarizes the state of the output for all applicable output
configurations in the case of transitioning to FAULTED state or on total IOM failure.