Rockwell Automation 1715-OF8I Redundant I/O System User Manual - Manual (Page 250)

250 Rockwell Automation Publication 1715-UM001C-EN-P - March 2014
Appendix A Status Indicators
Channel Faults
A channel fault is indicated when a detected, faulty channel is isolated to a
hardware fault on a specific channel of an I/O module. All channel faults are also
reported as a module fault. This means that the CHANNEL indicator turns
RED, the Module Status indicator turns RED, and the Rack Status indicator on
the adapter module also turns RED.
A channel fault on an input module indicates that the channel with the fault no
longer contributes to the reported values. In a dual configuration, as long as one
channel is not faulted, valid data continues to be reported.
If a channel fault on an output module occurs, the channel continues to drive the
output to the best of its ability, in most cases. Otherwise, a fail-safe state occurs.
In dual configuration, the output values continue as determined by the adapter as
the second module outputs the full current.
Field Faults
A field fault is indicated when a detected fault condition is isolated to a field
condition or field device and the cause is not the hardware associated with the
channel or output module. Examples are an open circuit field connection, no
field power, or an out-of-range signal. These faults are indicated by a
CHANNEL indicator flashing AMBER. Steady AMBER indicates that the
channel is ON or in range.
User Application Fault Indications and Logging
The information available includes the following:
• Module presence (that is, Shutdown or Run modes)
• Module health and status (that is, Module Status or Fault)
• Channel health and status (that is, individual channel Module Status/fault
or field fault)
• An echo of the front panel indicators for each module