Rockwell Automation 1791-XXXX Discrete I/O AC and DC Block I/O Input and Output Modules - Manual (Page 71)

Chapter
5
5-1
Troubleshooting
In this chapter you will learn about the indicators on the block I/O module,
and how to use them to troubleshoot the unit.
Each block I/O module has indicators (Figure 5.1) which provide
indication of module status. Each module has the following:
Indicator Color Quantity Description
COMM Green 1
Indicates whether communication is occurring between processor or
scanner and the block module
STATUS Red 1 Indicates hardware or software error, and if communication has failed
I/O Status Red 16 Reflect the state of the individual inputs and/or outputs (on or off)
Figure 5.1 shows the location of the indicators. Refer to Table 5.A for
status indications reported by the indicators.
Figure 5.1
Indicators on the Block I/O Module
COMM
STATUS
12404-I
Communication
Indicator
(green)
Fault Status
Indicator
(red)
16 Input/Output
Status
Indicators
(red)
COMM
STATUS
32 Input/Output
Status
Indicators
(red)
16Ćpoint Block 32Ćpoint Block
Communication
Indicator
(green)
Fault Status
Indicator
(red)
Chapter Objectives
Indicators