10–19
Troubleshooting
Publication 1747-6.2
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 action for
Inadequate System Power on page 10–12.
Fatal Error and
No
o
unication
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
Communication
channel is
damaged.
Replace processor.
Channel
configured for
DF1.
See your programming software user manual for channel
configuration information.
The Following
Error Exists
Probable Cause
Recommended Action
The SLC 5/03,
SLC 5/04, or
SLC 5/05
processor is
trying to
establish
co
unication
DH-485
communication
parameters are
improperly set up.
1. Check communication parameters of programmer.
Programmer and processor baud rate must match.
Programmer and processor node addresses must be
different.
2. Try different combinations of:
a. baud rate (Processor default is 19200.)
b. node address (Processor default is 1.)
3. Try to increase the maximum node address. (Default
is 31.)
See your programming software user manual for channel
configuration information.
communication,
but cannot find
other active
nodes.
Bad Connection
1. Check cable continuity.
2. Check cable connections between programmer and
processor.
nodes.
Low or No Power
to Communication
Device
1. Verify proper power supply selection and backplane
loading. (The 1747-PIC and 1747-AIC draw power off the
backplane.)
2. Verify proper 120/240V power supply jumper selection.
See page 6–8.
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
ÉÉ
Indicates the LED is FLASHING or OFF.
POWER
RUN
FLT
BATT
É
FORCE
DH485
RS232
If the RS232 Channel
is in DH485 Mode
and the LEDs
indicate:
➀
If the RS232 Channel
is in DH485 Mode
and the LEDs
indicate:
➀
POWER
RUN
FLT
BATT
É
FORCE
DH485
RS232