Parker AC890PX Series, Engineering Reference

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A p p e n d i x D : P r o g r a m m i n g
D-19
AC890PX AC Drive
CURRENT LIMIT
SETUP::MOTOR CONTROL::CURRENT LIMIT
Designed for all Motor Control Modes, except PMAC control mode.
This function block allows you to set the maximum level of motor rated current (as a % of the user-set MOTOR CURRENT) which is allowed to
flow before current limit action occurs. If the measured motor current exceeds the current limit value with a motoring load, the motor speed is
reduced to shed the excess load. If the measured motor current exceeds the current limit value with a regenerating load, the motor speed is increased
up to a maximum of MAX SPEED (REFERENCE function block).
NOTE The maximum value of current limit for a particular motor is limited by the 890 current rating. If a motor of larger rating than the
890+ is connected, then the current limit applies to the 890 and not the motor. In this case, the maximum value of the CURRENT
LIMIT parameter is 150.00%.
Parameter Descriptions
CURRENT LIMIT PREF: 82.01 Default: 150.00 % Range: 0.00 to 300.00 %
This parameter sets the level of motor current, as a % of MOTOR CURRENT (refer to the MOTOR INDUCTION function block) at which the
Drive begins to take current limit action.
REGEN LIM ENABLE PREF: 82.02 Default: TRUE Range: FALSE / TRUE
This parameter enables or disables regenerative current limit action.
Note that this parameter only works in open-loop VOLTS / Hz motor control mode.