Delta VFD11AMS21AFSHA, User Manual

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Chapter 12 Description of Parameter Settings

MS300 (High Speed Model)
12-06-3
 When there is any problem as using deceleration time, refer to the following items to solve it.
1. Increase suitable deceleration time.
2. Install brake resistor (refer to Chapter 7-1 for details) to dissipate the electrical energy that
regenerated from the motor as the form of heat.
 Related parameters: Pr. 01-13, Pr. 01-15, Pr. 01-17, Pr. 01-19 Decel. Time 1~4, Pr. 02-13
Multi-function output (Relay), Pr. 02-16~Pr. 02-17 Multi-function output (MO1, 2), and
Pr. 06-01 over-voltage stall prevention.

Over-current Stall Prevention during Acceleration
Factory Setting:
Settings Heavy Load: 0~200 % (100 % corresponds to the rated
current of the drive)
180

This parameter only works in VF mode.
 If the motor load is too large or acceleration time of drive is too short, the output current of drive
may be too high during acceleration, and it may cause motor damage or trigger protection
functions (OL or OC). This parameter is used to prevent these situations.
 During acceleration, the output current of drive may increase abruptly and exceed the setting
value of Pr. 06-03. The drive will stop accelerating and keep the output frequency constant, and
continues to accelerate after the output current drops.
 When the over-current stall prevention is enabled, the acceleration time of drive will be longer
than the setting.
 When the over-current stall prevention occurs due to the motor capacity is too small or operates
in the factory setting, please decrease Pr. 06-03 setting value.
 When there is any problem by using acceleration time, refer to the following items to solve it.
1. Increase suitable deceleration time.
2. Setting Pr.01-44 Auto Acceleration / Deceleration Setting to 1, 3 or 4 (auto accel.)
3.
Related parameters: Pr. 01-12, 01-14, 01-16, 01-18 (settings of accel. time 1~4), Pr. 01-44
Auto Acceleration / Deceleration Setting, Pr. 02-13 Multi-function Output (Relay),
Pr. 02-16~02-17 Multi-function Output (MO1, 2)
06-03
Over-Current
Detection
Level
Over-Current Stall prevention during
Acceleration,frequ ency held
actual acceleratio n time when over-current stall
prevention is enabled
Output current
Setting frequency
Output frequency
Time
Original setting of acceleration time