Rockwell Automation 1747-L5xx SLC 500 Modular Hardware Style User Manual - Manual (Page 155)

Publication 1747-UM011G-EN-P - June 2008
Troubleshooting 155
Identifying SLC 5/03, SLC 5/04, and SLC 5/05 Processor
Communication Errors
SLC 5/03. SLC 4/04, and SLC 5/05 Communication Errors
If the status indicators
indicate The following
error exists Probable Cause Recommended Action
• Power status indicator is
on
• DH-485, DH+, or ENET
status indicator is off
• FLT status indicator is off
or flashing
• Status of Run, Force,
Batt, and RS232 status
indicators do not matter
Fatal error and no
communication
Inadequate system
power.
1. Check line power.
2. Check 120/240V power supply jumper selection. See
page 106. Also, see the recommended actions for
inadequate system power on page 150.
Communication
channel is shut
down.
Check communication channel configuration with your
programming software. Also, see page 161 to return the
processor to initial factory conditions.
Communication
channel is
damaged.
Replace the processor.
• Power status indicator is
on
• RS232 status indicator is
off
• FLT status indicator is off
or flashing
• Status of Run; Force;
DH-485, DH+, or ENET;
or Batt status indicators
do not matter
Fatal error and no
communication
Inadequate system
power.
1. Check line power.
2. Check 120/240V power supply jumper selection. See
page 106. Also, see the recommended actions for
inadequate system power on page 150.
Communication
channel is shut
down.
Check communication channel configuration with your
programming software. Also, see page 161 to return the
processor to initial factory conditions.
communication
channel is
damaged.
Replace the processor.
Channel
configured for DF1
or User mode.
See your programming software documentation for channel
configuration information.