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

Over-current Stall Prevention during Acceleration


Settings
 If the motor load is too large or drive acceleration time is too short, the AC drive output current may
increase abruptly during acceleration and it may cause motor damage or trigger protection
functions (OL or OC). This parameter is used to prevent this situation.
 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 acceleration 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
 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
Chapter 12 Description of Parameter SettingsC2000 Series
Normal duty: 0~160% (100%: drive's rated current)
Heavy duty: 0~180% (100%: drive's rated current)
Over-Current Stall p revention during
Acceleration,frequ ency held
Original setting of acceleration time
actual acceleratio n time when over-current stall
prevention is ena bled
Normal duty: 0~160% (100%: drive's rated current)
Heavy duty: 0~180% (100%: drive's rated current)
12-
Output current
Setting frequency
Output frequency
101
Factory Setting: 120
Factory Setting: 150
Time
Factory Setting: 120
Factory Setting: 150