Chapter 6, 6 – troubleshoot the module, Overview – Rockwell Automation 1794-IRT8XT FLEX I/O Thermocouple/RTD /Millivolt Input Module User Manual User Manual
Page 63: Module indicators, Troubleshoot the module, Overview module indicators, Chapter
51
Publication 1794-6.5.12 - September 2011
Chapter
6
Troubleshoot the Module
Overview
This chapter provides a description of the different status indicators for the
FLEX I/O Thermocouple, RTD, and mV module to help you troubleshoot.
Module Indicators
The FLEX I/O module has one status indicator (PWR) that is On when
power is applied to the module, and one fault indicator (F) for each input.
IN 0
IN 2
IN 4
IN 6
IN 1
IN 3
IN 5
IN 7
TC RTD INPUT 8 CHANNEL
3
1794-IRT8
PWR
F
F
F
F
F
F
F
F
A
– Insertable label for writing individual input designations
B
– Fault Indicator - indicates noncritical fault
C
– Power Indicator - indicates power applied to module A
A
B
C
Status Indicators
Indicator
Color
State
Description
Fault
Red
On
At power up – Channel 0 indicator lights at power up until all internal
diagnostics are checked. After successful power up, the indicator
goes off if no fault is detected and the module has started
communicating with an adapter.
After successful power up – Indicates a critical fault, such as
diagnostic failure. If channel indicator stays solid red after power up,
there is an internal module error. Try cycling power. If problem
persists, replace module.
If channel indicator continues to blink after power up, communication
between the module and the adapter has not been established.