Rockwell Automation Publication 1715-UM001J-EN-P - December 2020 131
Chapter 4 Digital I/O Operation
During normal operation with an adapter present, the state of the outputs can
be configured when no connections from a Logix controller are active.
Analog output modules can be configured to OFF, HOLD LAST VALUE, or
GOTO SPECIFIED VALUE.
Energize-on-communication-failure
The 1715 Redundant I/O System can be a part of an energize-on
communication failure system. This means that during a system fault, the
output module can be set so that the output is energized. This is on a point-by-
point basis. The following are examples of energize-to-trip uses:
• A fan that runs a ventilation system
•Emergency lights
De-energize-to-trip
During output, when a system fault occurs, the output module can be set so
that the output is de-energized. This is on a point-by-point basis. The following
are examples of de-energize-to-trip uses:
• Motor starters
• Safety contactors
Disable Line Test
The digital output module incorporates line test functionality that can report
and indicate ‘no load’ field faults. This functionality can be enabled or disabled
by checking or unchecking the box. This is on a point-by-point basis.
IMPORTANT
In Shutdown mode, the analog output module will TURN OFF all
channel status indicators irrespective of the value being output.
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