User Manual

158 Rockwell Automation Publication 1756-UM540A-EN-P - May 2014
Chapter 9 Troubleshoot Your Module
Status Indicators for the
1756-IRT8I Module
The following graphic shows the status indicators used with
1756-IRT8I module.
The following table describes the status indicators.
FLT Off The channel is operating as expected.
Steady red • The channel is faulted.Possible causes of the fault include:
– Underrange/overrange detection
– Triggered process alarm
– Triggered rate alarm
– Wire off detection
– Calibration fault
For more information on these causes see Chapter 3, 1756-IF8I Isolated
Analog Input Module on page 45
Flashing red One of the following:
• The channel is faulted. See the previous row for more information
about faults.
• The channel is being calibrated.
RTD/TC/mV INPUT
ST
FLT
O
K
Indicator Status Description
OK Steady green The module is in a normal operating state in Run mode.
Flashing green The module passed internal diagnostics and is not actively controlled or
the connection is open and the controller is in Program mode.
Flashing red Previously established communication has timed out.
Steady red Replace the module.
ST Steady yellow The channel is operating as expected.
Flashing yellow The channel is being calibrated.
Off The channel is not in use or is faulted.
FLT Off The channel is operating as expected.
Steady red • The channel is faulted. Some possible causes of the fault include:
– Underrange/overrange detection
– Wire off detection
– Calibration fault
For more information on these causes see Chapter 4, 1756-IRT8I Combined
Temperature-sensing Isolated Analog Module on page 65
Flashing red One of the following:
• The channel is faulted. See the previous row for more information
about faults.
• The channel is being calibrated.