User manual

Publication 1747-IN011F-EN-P - May 2007
Troubleshooting 157
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 108. Also, see the recommended actions for
inadequate system power on page 152.
Communication
channel is shut
down.
Check communication channel configuration with your
programming software. Also, see page 163 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 108. Also, see the recommended actions for
inadequate system power on page 152.
Communication
channel is shut
down.
Check communication channel configuration with your
programming software. Also, see page 163 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.