Schneider Electric 840 USE 106 0 manual 191

Maintenance

Failure of Fiber Link from Primary Transmit to Standby Receiver

Fiber Optic Cable Replace the cable and restart the controller. The unit should return to Standby

mode. If it does not, cycle the power on the Standby unit.

If the cable has been connected improperly (i.e., the transmit port of the Primary is inked to the transmit on the Standby), two error patterns are possible.

If the program has already been loaded in the Standby controller and both controllers are running, then the Ready and Com Err indicators light on the

lStandby CHS 110 module.

If the program has not yet been loaded in the Standby and you attempt to load it using the program update procedure, then the Ready indicator lights and the Standby blinks.

If both fiber links fail, the Com Err indicator lights on the Standby CHS 110. Again, replace the cable and restart the controller. The unit should return to Standby mode. If it does not, cycle the power on the Standby unit.

840 USE 106 00 January 2003 191