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Revision 8.6
SECTION 3 : HOIST PARAMETERS
34
3.2.9.
Lower plugging V
NO
PARAMETER
DESCRIPTION
SCALE
INCREMENT
DEFAULT
9
Lower plugging V
Lower plugging voltage
50% to 100%
5%
80%
The lower plugging voltage parameter sets the maximum ceiling % voltage applied during lowering
retardation. In the event that this voltage is not sufficient to retard the motor, after an initial period of
750 ms the ceiling is removed and maximum voltage may be applied.
CAUTION
SETTING THIS VALUE TOO HIGH CAN CAUSE
HIGH CURRENT PEAKS. SETTING THIS
VALUE TOO LOW CAN RESTRICT THE
BRAKING TORQUE.
3.2.10.
Brake Release I
NO
PARAMETER
DESCRIPTION
SCALE
INCREMENT
DEFAULT
10
Brake release I
Brake release current
0% to 50%
5%
15%
This parameter sets the minimum stator current required to allow the brakes to be released.
As a general rule this current value must be equal or greater than the motor magnetizing current. If
this current is not known, the no-load current is close enough.
Brake release percentage current = (No load current / Motor current) x 100
3.2.11.
Hoist Start Volt
NO
PARAMETER
DESCRIPTION
SCALE
INCREMENT
DEFAULT
11
Hoist Start Volt
Hoisting min. start volts
30% - 80%
1%
60%
This parameter sets up the minimum voltage applied as a percentage of the supply voltage to the
motor immediately at start of a hoisting cycle.
When this voltage is reduced the starting up of a hoisting cycle may be smoother when no-load is
present but it may allow a slight drop of the load when hoisting, it is advisable to keep its value
between 50% and 60% in most cases.
When this voltage is increased it may cause slight speed overshoot during start-up of no-load
operation.
