Specifications

10–20 Troubleshooting
Publication 1747-6.2
The Following
Error Exists
Probable Cause Recommended Action
Channel is
configured for
DH485 mode.
Check communication parameters of channel
configuration. Also, see your programming software user
manual.
The SLC 5/03,
SLC 5/04, or RS232/DF1
aa t
Check communication parameters of programmer and
channel configuration:
a. baud rate
b. DF1 node addresses (Processor default is 1 for DF1
half-duplex, and 9 for DF1 full-duplex.)
c. o c ckin
SLC 5/05
processor is not
transmitting.
p
a
r
a
me
t
ers
improperly set up.
c.
err
o
r
c
he
ckin
g
d. number of data bits
Programmer and processor baud rate must match.
Programmer and processor addresses must be different.
See your programming software user manual.
Hardware Problem
1. Check cable connections.
2. Check cable pinouts. Also, see appendix B for
RS-232 pinouts.
The Following
Error Exists
Probable Cause Recommended Action
A fatal error has
occurred.
Excessive noise or
a faulty SLC 5/03,
SLC 5/04, or
SLC 5/05
processor.
1. Cycle power to obtain flashing FLT LED and default
program.
2. Examine the error code following the power cycle.
Take appropriate action.
3. Reload your program.
4. Contact your local Allen-Bradley representative if the
error persists.
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.
Indicates the LED is FLASHING or OFF.
If the RS232 Channel
is in DH485 Mode
and the LEDs
indicate:
➀
POWER
RUN
FLT
BATT
FORCE
DH485
RS232
POWER
RUN
FLT
BATT
FORCE
DH485
RS232
If the LEDs indicate:
➀