10–17
Troubleshooting
Publication 1747-6.2
Identifying SLC 5/03, SLC 5/04, and SLC 5/05 Processor
Communication Errors
The Following
Error Exists
Probable Cause
Recommended Action
Inadequate
System Power
1. Check line power.
2. Check 120/240V power supply jumper selection. See
page 6–8. Also, see the recommended actions for
inadequate system power on page 10–12.
Fatal Error and
No
Communication
Communication
channel is “shut
down.”
Check communication channel configuration with your
programming software. Also, see “Returning the SLC 5/03,
SLC 5/04, and SLC 5/05 Processors to ‘Initial Factory
Conditions’” on page 10–25.
Communication
channel is
damaged.
Replace processor.
Refer to the following key to determine the status of
the LED indicators:
Indicates the LED is OFF.
Indicates the LED is ON.
➀
The DH485 LED on the SLC 5/03 processor is labeled DH
+
on
the SLC 5/04 processor, and ENET on the SLC 5/05 processor.
Indicates the LED is FLASHING.
Status of LED does not matter.
ÉÉ
Indicates the LED is FLASHING or OFF.
POWER
RUN
FLT
BATT
É
É
FORCE
DH485
RS232
If the LEDs indicate:
➀
