38
3 System Operation
WARNING!
If limit switches are adjusted after a curve has been programmed, the range limits must be re-
entered.
E17
Fault 161...165
Only with the option "flying curve switching”
With the option "flying curve switching" the 2
nd
monitoring band is replaced by running direc-
tion monitoring for up to 30 seconds after switching over. This tests whether the control ele-
ment is moving towards the new set-point value.
Check feedback signal at the instant of switching, the value must change
Possible reason:
- The motor is sluggish
Remedy:
- Arise puls length of the motor parameter 730 - 734
Possible reason:
- The motor has too much play
Remedy:
- extend parameter 705
WARNING!
Parameter 705 is a safety parameter, the standard value is 3 sec. With the extension you have
to ensure, that a longer fault tolerance time is acceptable with the conditions of the system.
During that time no fault shut-down will be carried out, even if the actuator doesn't move in the
right direction.
TIP:
If no range limit exist, faults may occur, dependent on the load position during the "flying curve
switching".
Change in a curve set without range limits, par example a curve set without pre-ventilation.
Remedy:
- Enter shut-off limits manually or turn off the determination of range limits for this curve set.
(contents 4 in parameter 106-108).
E18
Fault 451...456
A control element has left the ignition range after the ETAMATIC had detected the ignition po-
sition.
Possible causes:
– control element oscillating
– wiring fault
– holding torque of motor too low
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