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Introduction
About the Indicators
Rockwell Automation Publication 1794-UM061B-EN-P - March 2020
Interpret the Indicators
This chapter provides the following:
For Information About
About the Indicators
1794-IB16D Diagnostic Functional Details
1794-OB16D Diagnostic Functional Details
The diagnostic modules have indicators that let you check the module health and
operational status. The following status can be checked with the indicators.
• Channel I/O Status - This indicator displays the ON/OFF state of the
input channel, and channel wiring fault conditions:
– Off indicates that the channel is off with no faults.
– Yellow indicates that the channel is on with no faults.
– Red indicates either a channel open or short condition.
• Module Fault Status- This indictor turns red for any individual
input/output channel open, short, or module reverse power conditions.
With no fault, the module fault status indicator turns off.
Allen-Bradley
24 VDC SINK INPUT WITH DIAGNOSTIC
0
1
2
3
4
5
1
Allen-Bradley
24 VDC SOURCE OUTPUT WITH DIAGNOSTIC
0
1
2
3
4
1
Where:
1 = Channel bicolor Status indicator
2 = Insertable label for writing individual input/output designations
3 = Module bicolor Fault Indicator
See Page
105
106
109
1794-IB16D
6
7
8
9
10
11
12
13
14
15
2
1794-OB16D
5
6
7
8
9
10
11
12
13
14
15
2
A
Appendix
2
FLT
3
2
FLT
3
105
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