Over-Current Stall Prevention During Operation - Delta C2000 series User Manual

During acceleration, the AC drive output current may increase abruptly and exceed the value
specified by Pr.06-03 due to rapid acceleration or excessive load on the motor. When this function
is enabled, the AC drive will stop accelerating and keep the output frequency constant until the
current drops below the maximum value.
When the over-current stall prevention is enabled, drive deceleration time will be larger than the
setting.
When the Over-Current Stall Prevention occurs due to too small motor capacity or in the factory
setting, please decrease Pr.06-03 setting.
When there is any problem by using acceleration time, refer to the following items to solve it.
Related parameters: Pr.01-12, 01-14, 01-16, 01-18 (settings of accel. time 1~4), Pr.01-44
1. dd the suitable acceleration time.
2. Setting Pr.01-44 Optimal Acceleration/Deceleration Setting to 1, 3 or 4 (auto accel.)
Optimal Acceleration/Deceleration Setting, Pr.02-13~02-14 (Multi-function Output 1 RY1, RY2), Pr.
02-16~02-17 Multi-function Output (MO1, 2)
06-03
Over-Current
Detection
Level

Over-current Stall Prevention during Operation

Settings Normal duty: 0~160% (100%: drive's rated current)
Heavy duty: 0~180% (100%: drive's rated current)
It is a protection for drive to auto decrease output frequency when the motor is over-load abruptly
during motor constant operation.
If the output current exceeds the setting specified in Pr.06-04 when the drive is operating, the drive
will decrease its output frequency (according to Pr.06-05) to prevent the motor stall. If the output
current is lower than the setting specified in Pr.06-04, the drive will accelerate (according to
Pr.06-05) again to catch up with the set frequency command value.
Chapter 12 Description of Parameter Settings|C2000 Series
Over-Current Stall prevention during
Acceleration,frequency held
Original setting of acceleration time
actual acceleration time when over-current stall
prevention is enabled
12-95
Output current
Setting frequency
Output frequency
Time
Factory Setting: 120
Factory Setting: 150