Chapter Summary - Allen-Bradley 1779-KFMR User Manual

Chapter Summary

1. Check the AC POWER ON indicator.
OFF — If off, check the AC POWER switch setting, fuse, AC
source voltage, and interlock switch. If you still haven't found the
source of the problem, try replacing the power-supply board.
ON — If on, proceed to Step 2.
2. Check the DC POWER ON indicator.
OFF — If off, first set the AC POWER switch OFF, wait
20 seconds and 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 — If on, press EXIT REQUEST; switch to RESET
momentarily and then to RUN; then proceed to Step 3.
3. Check the HOST FAULT indicator.
ON — If on, replace the host board.
OFF — If off, proceed to Step 4.
4. Check the MAC FAULT indicator.
ON — If on, replace the MAC board.
OFF — If off, proceed to Step 5.
5. Check the DUP ADDR indicator.
ON — If on, press EXIT REQUEST; set a unique link address
for the node; then switch to RESET momentarily and then to
RUN.
OFF — If off, proceed to Step 6.
6. Check the IN-RING/SEEKING-MEM indicator.
YEL — If yellow, check the cabling on the Data Highway II link.
GR — If green, check the cabling to the host device.
In this chapter, we gave you information about individual indicators and
switches, as well as procedures for using them to operate the interface.
We also provided procedures for troubleshooting and for replacing faulty
boards.
Chapter 5
Operation and Troubleshooting
5 13