BONFIGLIOLI active cube 201, Руководство по эксплуатации

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138 Operating Instructions ACU 12/16
13.2.1 Switch-Off Threshold
The
Switch-Off Threshold.
637 defines the frequency as from which a standstill of the drive is
recognized. This percentage parameter value is relative to the set
Maximum Frequency
419 .
The switch-off threshold is to be adjusted according to the load behavior of the drive and the device
output, as the drive must be controlled to a speed below the switch-off threshold.
Parameter Setting
No. Description Min. Max. Factory setting
637 Switch-Off Threshold 0.0 % 100.0 % 1.0 %
WARNING
If the motor builds up a stopping torque, it may be possible that the switch-off
threshold stop function is not reached due to the slip frequency and the standstill of
the drive is not recognized. In this case, increase the value of the
Switch-Off
Threshold
637 .
13.2.2 Holding Time
The
Holding Time
638 is considered in stopping behavior 1, 3, 4 and 6. Control to Zero speed
results in the motor heating up and should only be done for a short period in the case of internally
ventilated motors.
Parameter Setting
No. Description Min. Max. Factory setting
638 Holding time stop function 0.0 s 200.0 s 1.0 s
13.3 Direct current brake
Stopping behaviors 3, 6, 7 and the search run function include the direct current brake. Depending
on the setting of the stop function, a direct current is impressed into the motor either directly or,
when it is at a standstill, after the demagnetization time. The impression of the
Braking Current
631 results in the motor heating up and should only be done for a short period in the case of
internally ventilated motors.
Parameter Setting
No. Description Min. Max. Factory setting
631 Braking current 0.00 A

2

I
FIN

2

I
FIN
I
FIN
: Rated value of frequency inverter
The setting of the parameter
Braking Time
632 defines the time-controlled stopping behavior.
Contact-controlled operation of the direct current brake is activated by entering the value zero for
the
Braking Time
632.
Time controlled:
The direct current is controlled by the status of the signals Start clockwise and Start anticlockwise.
The current set by the parameter
Braking Current
631 flows until the time set by the parameter
Braking Time
632 has elapsed.
For the duration of the braking time, the control signals Start clockwise and Start anticlockwise are
logical 0 (Low) or 1 (High).