Tvr Soft Stop; Aac Adaptive Acceleration Control - Danfoss mcd-500 Operating Instruction

5 Application Examples

5.4.2 TVR Soft Stop

Timed voltage ramp reduces the voltage to the motor gradually over a defined time. The load may continue to run after the stop ramp is complete.
Timed voltage ramp stopping can be useful for applications where the stop time needs to be extended, or to avoid transients on generator set supplies.
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5.4.3 AAC Adaptive Acceleration Control

To use AAC Adaptive Acceleration Control to control stopping performance:
1. Select Adaptive Control from the Stop Mode menu (Par. 1-10)
2. Set the desired Stop Time (Par. 1-11)
3. Select the required Adaptive Stop Profile (Par. 1-14)
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NB!
AAC will control the load according to the programmed profile.
NB!
AAC does not actively slow the motor down and will not stop the motor faster than a coast to stop. To shorten the stopping time of
high inertia loads, use brake.
NB!
If replacing a motor connected to an MCD 500 programmed for AAC starting or stopping, or if the starter has been tested on a different
motor prior to actual installation, the starter will need to learn the characteristics of the new motor. To force the MCD 500 into learn
mode, adjust parameter 1-12 Adaptive Control Gain as follows:
If 1-12 is at default setting of 75%, adjust to 76%.
If 1-12 is not at default setting of 75%, adjust to 75%.
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MCD 500 Operating Instruction
1: Stop time (Par. 1-11)
AAC Adaptive stop profile (Par. 1-14):
1. Early deceleration
2. Constant deceleration
3. Late deceleration
4. Stop time (Par. 1-10)