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Issue:
The Perle 394 controller will not go active the lcd displays PL
Cause:
The 394 controller software diskette could be dirty or scratched,or the floppy drive could also be dirty.
Solution:
The PL means the controller has haulted during Program Load.
To resolve the boot up problem.
1)Power off the controller.
2) check the floppy diskette for dirt or scratches.
3) check the floppy drive and clean the heads or blow out the drive with canned air, or equvilent device.
4) Locate a backup configured copy of the controller software diskette.
5) Insert in floppy drive and reboot controller.
Completing the above should restore the controller to working condition,if none of the above works,the floppy disk drive would require service.