Delta CFP2000 Series User Manual page 341

Chapter 12 Description of Parameter SettingsCFP2000
Smart over-current stall prevention
 Adopts closed-loop control. It takes the setting for Pr.06-03 over-current stall prevention during
acceleration as target command during acceleration and deceleration, and takes Pr.06-04
over-current stall prevention during operation as target command at constant speed. When the
output current exceeds the stall prevention level, the controller decreases the output frequency
gradually according to the closed-loop response until the current drops below the stall
prevention level, and returns to target frequency based on the previous setting when the current
is lower than the stall prevention level. If the output current is still higher than the stall prevention
level during the adjustment, the output frequency decreases to the minimum output frequency at
0.5 Hz.
Over-current Stall Prevention during Acceleration

Settings
 This parameter only works in VF and SVC control modes.
 If the motor load is too large or the drive's acceleration time is too short, the output current of the
drive may to too high during acceleration, and it may cause motor damage or trigger protection
functions (oL or oc). Use this parameter to prevent these situations.
 During acceleration, the output current of the drive may increase abruptly and exceed the value
of Pr.06-03. In this case, the drive stops accelerating and keeps the output frequency constant,
and then continues to accelerate until the output current decreases.
 When you enable the over-current stall prevention, the drive's acceleration time is larger than
the setting.
 When the over-current stall prevention occurs because the motor capacity is too small or
operates in the default, decrease the Pr.06-03 setting value.
 When you encounter any problem with the acceleration time, refer to the following guides for
troubleshooting:
1. Increase the acceleration time to a suitable value.
2. Setting Pr.01-44 Auto Acceleration / Deceleration Setting to 1, 3 or 4 (auto-acceleration).
Light load: 0–130% (100%: drive's rated current)
Normal load: 0–160% (100%: drive's rated current)
12.1-06-5
Default: 120