Turntable control SmartTurn
Faults
54
Dok-ID:EXPERT-0003-EN-2011
The fault is also generated if the two inputs forward on (E1) and
backward on (E2) are simultaneously activated by the controller for
longer than 120 ms. In this case the outputs forward start (A1) and
backward start (A2) are switched off and blocked until E1 and E2
are off again. If E1 and E2 are off, after 3 s the overrun faults
forward/backward A4 and A5 are reset. In the diagnostics software
when the fault occurs, the fault message "Both Inputs On" is set,
this fault message remains until reset or switch-off of the 24 V
supply. See also section 6.2.4 "Input forward and backward on"
(Both Inputs On)
Possible causes
Measures
Brake pads are worn or the brake is defective
Check the air gap of the brake and adjust
Replace the brake if necessary
The brake is incorrectly connected or is not quickly
applied
Check the activation of the brake and correct if
necessary
Excessive brake application time
Use a brake with shorter application time (under
25 ms)
Turntable overloaded
Reduce the load to the calculated value
Turntable cycle time too short
Reduce the motor speed so that the turntable cycle
time is not underranged
The direction of drive rotation does not agree with
the set rotary direction
Set the direction of drive roller rotation on switch S3,
change the direction of motor rotation if necessary
In reverse mode, wrong rotary direction activation
through the PLC:
- Activation of forward start even though the
turntable is in the forward position.
- Activation of backward start even though the
turntable is in the back position.
Avoid wrong activation through the PLC.
- Switch off forward start, correct PLC activation
- Switch off backward start, correct PLC activation
Wrong protective circuit on the power contactors
and/or the braking contactor
Only use varistor protective circuits, other protective
circuits can significantly extend the contactor
dropout time, and thus extend the turntable stop
distance
Sudden significant load change
Turn the turntable several times so that the switch-
off angle can be adapted
Forward on (E1) and backward on (E2) are activated
simultaneously by the PLC for longer than 120 ms
Check and correct the PLC activation
