Troubleshooting The Interface - Allen-Bradley 1779-KFMR User Manual

Chapter 5
Operation and Troubleshooting

Troubleshooting the Interface

5 12
When you suspect that the interface is not functioning properly, follow
these steps (Figure 5.6).
Figure 5.6
Troubleshooting Flowchart
Problem
Suspected
AC
Step 1
POWER
ON
ON
DC
Step 2
POWER
ON
ON
Press EXIT REQUEST.
Switch to RESET momentarily
and then to RUN.
HOST
Step 3
FAULT
OFF
MAC
Step 4
FAULT
OFF
DUP
Step 5
ADDR
OFF
IN-RING/
Step 6
SEEKING
MEM
Green
Check:
AC POWER Switch
Fuse
AC Power Source
OFF
Interlock Switch
Power-Supply Board
OFF Set the AC power switch to
OFF, wait 20 seconds, then
set the AC power switch to
ON. If the indicator is still OFF,
try replacing each of the three
boards until you find the
faulted one.
ON
Replace host board.
ON
Replace MAC board.
Press EXIT REQUEST.
ON
Set unique link address.
Yellow
Check cabling on Data
Highway II link.
Communication on Data
Highway II link OK. Check
cabling to the host device.