Failure Due To Response Of Positioning Loop Monitoring; General - ABB LME620AI Service Instruction

10.7 Failure due to response of positioning loop monitoring

E7.2
speed monitoring
R7.1
actuator can not fol-
low the
with adjusted speed
rough-running
actuator

10.8 General

Actuator runs with creeping speed in one or both end positions
- check the software settings for leaving the end position; if „break-away" is activated, the actuator
moves with increased torque / force but with reduced speed
Imprecise behaviour in step-control mode
- use graphical user interface to check function assignment of digital input settings; select „step
controller"
Actuator over-runs end position(s)
- change the software settings for the end position behaviour to „Position-dependent switch-off"
and enter the associated switch-off position
- adjust the mechanical limit stops in order to avoid an end position over-run
Actuator moves into an end position once it reaches a setpoint
- de-activate „close tight" in the software settings for modulating control near the end position
Actuator position does not correspond to setpoint although the position signal corresponds to
the setpoint
- de-activate the progammable setpoint in the software settings for the setpoint characteristic
Actuator follows the setpoint only within a limited range
- de-activate „split range" in the software settings for the setpoint characteristic
28 Electrical Linear Actuators for Continuous Modulating Control LME620AI / LME620AN (Contrac)
E 7.1: Failure due to positioning loop monitoring
R 6.4:
(C 5 chpt. 10.9)
E7.3
stand still
monitoring
R7.2
actuator has left the
setpoint position
command
E7.4
wrong moving
direction
R7.3
actuator has moved
without into wrong direction
Trouble Shooting
E7.5
Moves too heavy in
end position
(rough-running)
R7.4
check end position
conditions (deposits
may cause friction
and slow down the
actuator)
43/68-13 EN