Start & Stop Parameters
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18
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18
Maximum Start Time
The maximum allowable starts time from start signal to
the end of acceleration. If voltage does not reach full
voltage during this time (for example, because of low
current limit setting), the starter will trip the motor.
LCD displays “Long Start Time” message.
Range: 1-30 sec (consult factory for extended range).
Contact Delay
Time delay for the End of Acceleration contact after
completion of starting process. Range: 0-120 sec.
Pump Control – Stop curve
Intended to prevent water hammer during stopping.
In pump applications, load torque decreases in square
relation to the speed and reducing the voltage will
reduce torque so motor will smoothly decelerate to
stop.
The following
Stop curves
can be selected:
Stop curve 0 –
Basic curve. See note at page 17.
Stop curve 1 –
Standard default curve – voltage is
linearly reduced from nominal to zero.
Stop curves 2, 3, 4 –
In some pump applications, when
pumping to a high level, a considerable part of the
torque is constant and does not decrease with speed. It
may happen that during soft stop, when voltage
decrease, motor torque quickly falls below load torque
and motor will abruptly stall instead of smoothly
decreasing speed to zero.
Curves 2, 3, 4 designed
to prevent stall condition.
Voltage
Deceleratio
n
2
1
3
4
Note:
Normally use stop curve 1. If motor stalls
quickly instead of slowly decreasing its speed,
select stop curve 2, then 3 or 4 if necessary.
Stop Curve 5
– Torque curve.
Provides linear torque control.
With certain loads, may cause
linear deceleration.
Deceleration Time – Soft Stop
Used for controlled deceleration
of high friction loads.
Determines motor voltage ramp
down time.
Range: 0-30 sec. (consult
factory for extended range).
U%
2
100%
30sec
Note:
soft stop initiation opens the End Of
Acceleration contact and opens the by-pass
contactor. Load will be transferred to the
HRVS-DN and voltage begins to ramp down.
Final Torque
Determines torque towards the
end of soft stop. If current is
still flowing after speed is softly
reduced to zero, increase the
final torque setting.
U%
2
100%
30 sec
Dual Adjustment
A secondary set of parameters used for varying loads,
two speed motors, etc. Connecting control supply to
Terminal 8 makes transfer to Dual Adjustment settings.
•
Initial Voltage 10-50% of
Un.
•
Current Limit 100-400% of
motor’s FLA.
•
Acceleration Time 1-30
sec.
•
Deceleration Time 0-30
sec.
•
Motor Full Load Ampere.
U%
100%
sec
2- -30
2- -10
40%
100%
20%
Note:
Consult factory for extended range.
Tacho Feedback, Incremental Shaft Encoder
(Optional)
Provides linear acceleration and
deceleration curves according to
rpm feedback. 12 tacho gain levels
can be selected for closed loop
control starting and stopping.
Note:
Consult factory for additional
information.
Motor Voltagae
+10Vdc
Speed RPM
Un
t
T