Rockwell Automation 1779-KP5_KP5R ORD.1779-5.3 - Manual (Page 59)

1779ĆKP5 Troubleshooting Tools
Chapter 6
6Ć4
When the module is passing the token or sending messages on a small
network, the RECEIVE LED appears to remain lit and the TRANSMIT
LED flickers.
Using the LEDs to Troubleshoot the Module
When you suspect that the 1779-KP5 is not functioning properly, use the
following troubleshooting flowchart (Figure 6.3).
Figure 6.3
Troubleshooting Flowchart
AC
Step 1
OFF
POWER
ON
Problem
Suspected
HOST
FAULT
MAC
FAULT
DUP
ADDR
IN-RING/
SEEKING
MEM
ON
DC
POWER
ON
Step 2
Press EXIT REQUEST switch.
When the exit is confirmed,
switch to RESET momentarily
Step 3
Step 4
Step 5
Step 6
ON
OFF
OFF
OFF
Green
OFF
ON
ON
ON
Yellow
Check:
AC POWER Switch
Fuse
Check the ribbon cable
connectors between the boards.
Replace host board.
Replace MAC board.
Press EXIT REQUEST.
Set unique link address.
Check cabling on Data
Communication on Data
Highway II link OK. Check
cabling to the host device.
Set the AC power switch to OFF,
wait 20 seconds, then set the AC
AC Power Source
Interlock Switch
Power-Supply Board
power switch to ON. If the indi–
cator is still OFF, try replacing
Highway II link.
each of the three boards until
you find the faulted one.
and then to RUN.
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