Rockwell Automation 1775-MX_S4A,D17756.3.1 User Manual PLC-3 BACKUP CONC(OR.DU1 - Manual (Page 110)

Diagnosing Faults
Chapter 6
6-6
Figure 6.4
Indicator Locations for 1775ĆMX Memory Communication Module
PASS and FAIL indicators
Status indicators
1775 - MX
Scanner
18752
Table 6.D
I/O Channel Indicators for All Scanner Modules
Indicator Status Description
CHx
ON
Communication between scanner module and the I/O
chassis on the corresponding I/O channel is properly
established.
Configured for I/O
Scanning
FLASHING
There is a fault on one or more of the I/O chassis on the
corresponding I/O channel.
OFF
No I/O chassis are configured on the corresponding I/O
channel or the channel is inactive.
CHx ON The channel is functioning properly.
Configured for
peerĆtoĆpeer
communication
FLASHING
The input file is too small at the processor receiving data.
The slave or master does not exist. Communication retry.
OFF The channel is inactive.
CHx ON The channel is functioning properly.
Configured for
backup
communication
FLASHING
The input file is too small at the processor receiving data.
The partner is not responding.
OFF The channel is inactive.