1-9 Excess Start Time
Range:
Function:
Excess start time is the maximum time the
VLT
®
Soft Starter MCD 500 attempts to start
the motor. If the motor does not reach full
speed within the programmed limit, the soft
starter trips. Set for a period slightly longer
than required for a normal healthy start. A
setting of 0 disables excess start time
protection.
20
s
*
[0:00–
4:00
(min:s)]
Set as required.
1-10 Stop Mode
Option:
Function:
Selects the stop mode. See
for more details.
Coast to stop*
TVR soft stop
Adaptive control
Brake
1-11 Stop Time
Range:
Function:
0
s
*
[0:00–
4:00
(min:s)]
Sets the time for soft stopping the motor using
timed voltage ramp or adaptive control. If a main
contactor is installed, the contactor must remain
closed until the end of the stop time. To control
the main contactor, use a programmable output
configured to
Run
. Sets the total stopping time
when using brake. See
for more details.
1-12 Adaptive Control Gain
Range:
Function:
75%
*
[1–200%] Adjusts the performance of adaptive control.
This setting affects both starting and stopping
control.
NOTICE
Leave the gain setting at the default
level unless adaptive control
performance is not satisfactory. If the
motor accelerates or decelerates too
quickly at the end of a start or stop,
increase the gain setting by 5–10%. If
the motor speed fluctuates during
starting or stopping, decrease the gain
setting slightly.
1-13 Adaptive Start Profile
Option:
Function:
Selects which profile the soft starter uses
for an adaptive control soft start. See
for more
details.
1-13 Adaptive Start Profile
Option:
Function:
Early acceleration
Constant
acceleration
*
Late acceleration
1-14 Adaptive Stop Profile
Option:
Function:
Selects which profile the soft starter uses
for an adaptive control soft stop. See
for more
details.
Early deceleration
Constant
deceleration*
Late acceleration
8.1.1 Brake
Brake uses DC injection to slow the motor actively. See
for more details.
1-15 Brake Torque
Range:
Function:
20%
*
[20–100%] Sets the amount of brake torque the soft
starter uses to slow the motor.
1-16 Brake Time
Range:
Function:
1 s
*
[1–30 s] Sets the duration for DC injection during a
braking stop.
NOTICE
This parameter is used with
parameter
1-11 Stop Time
. See
for details.
8.2 Protection
2-1 Phase Sequence
Option:
Function:
Selects which phase sequences the soft starter
allows at a start. During its prestart checks, the
soft starter examines the sequence of the
phases at its input terminals. If the actual
sequence does not match the selected option,
the soft starter trips.
Any sequence*
Positive only
Negative only
Parameter Descriptions
Operating Guide
MG17K602
Danfoss A/S © 05/2016 All rights reserved.
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