Delta CP2000 Series, User Manual

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Chapter 12 Description of Parameter Settings

CP2000
12.1-06-4
Traditional over-current stall prevention
 When the output current exceeds the over-current stall prevention level (Pr.06-03) during
acceleration, the output frequency stops accelerating. The output frequency continues to
accelerate when the output current drops below the stall prevention level to protect the drive.
 When the output current exceeds the over-current stall prevention during operation (Pr.06-04),
the output frequency decreases according to the setting for acceleration / deceleration time
selection for over-current stall prevention at constant speed (Pr.06-05). When the output current
drops below the stall prevention level, the output frequency accelerates to the target frequency
according to its previous set acceleration time.
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.