Bardac PLX - 8.1.11.8 DRIVE TRIP MESSAGE; Speed feedback mismatch; 8.1.11.11 DRIVE TRIP MESSAGE; Supply phase loss

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MOT OR DRIVE ALARMS 145

8.1.11.8 DRIVE TRIP MESS A GE / Speed feedback mismatch

See 8.1.1 MOT OR DRIVE ALARMS / Speed feedback mismatch trip enable PIN 171.

This message will also appear if a trip is caused by trying to field w eaken with A VF feedback.

8.1.11.9 DRIVE TRIP MESSA GE / Stall trip

See 8.1.8.1 STALL TRIP MENU / Stall trip enable PIN 178.

8.1.11.10 DRIVE TRIP MESS A GE / Missing pulse

See 8.1.5 M OT OR DRIVE ALARMS / Missing pulse trip enable PIN 175.

8.1.11.11 DRIVE TRIP MESSA GE / Supply phase loss

The controller continuously monitors the incoming supply of the ELl, EL2 connections. If either are lost, the

alarm will operate. The subsequent control action depends on the running condition at the time the alarm is

triggered. The message will also briefly appear after the control supply has been removed.

1) If the main contactor is energised at the time of failure then it will be de-energised after the ride through

time of 2 seconds has elapsed. If the supply is restored before the ride through time has elapsed then normal

running will resume. During the temporary supply loss period the PL/X will shut the armature current demand

off until it is safe to restore it. The unit measures the back emf to calculate a safe start into the rotating load.

2) If the main contactor is de-energised at the time of the supply loss then a Start command will allo w the

contactor to energise but inhibit armature current. After a fe w seconds the contactor will be de-energised.

The Control Supply on T52, T53 can tolerate a supply loss for 300mS at 240 V A C, and 30mS at 110V AC,

before requesting permanent shut dow n.

See also 6.1.16 C ALIBRA TION / EL1/2/3 rated A C volts PIN 19 QUICK ST ART.

The controller will detect total failure of the supply. A missing phase is detected under most circumstances.

How ever, the controller may be connected to the same supply as other equipment that is regenerating a

voltage onto the supply lines during the missing phase period. Under these circumstances, the SUPPLY

PH ASE LOSS alarm may be unable to detect failure of the incoming supply, and hence not operate.

In the case of a supply phase loss alarm, the supply to the controller should be checked.

The auxiliary and the main high speed semi-conductor fuses, should be checked.