TM 5-3895-374-24-1
The Following
Probable Cause
Recommended Action
Error Exists
1. Check communication parameters of programmer
Programmer and processor baud rate must m atch ’
Programmer and processor node addresses must be
different
DH-485
2. Try different combinations of
communication
a
baud rate (Processor default is 19200 )
parameters are
b
node address (Processor default Is 1 )
The 5/03
improperly set up
processor Is
3. Try to increase the maximum node address (Default
establish
is 31)
trying to
communication,
See the Advanced Programming Software User Manual
but cannot find
(Catalog Number 1747-NM002) for channel configuration
other active
information
nodes
1. Check cable continuity
Bad Connection
2. Check cable connections between programmer and
processor
1. Verify proper power supply selection and backplane
Low or No Power
loading (The 1747-PIC and 1747-AIC draw power
to Communication
oft the backplane )
Device
2. Verify proper 120/240V power supply jumper
selection See page 5-5
Refer to the following key to determine the status
of the LED indicators
Indicates the LED Is OFF
Indicates the LED Is ON
Indicates the LED is FLASHING
Status of LED does not matter
Chapter 9
Troubleshooting
(page 3-452)
