Current Limit - Parker AC890 Product Manual

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
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
This parameter enables or disables regenerative current limit action.
Note that this parameter only works in open-loop VOLTS / Hz motor control mode.
ACTUAL CUR LIMIT
This diagnostic indicated the final actual current limit. This parameter is the input, to the INVERSE TIME function block.
D-20
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PREF: 82.01
PREF: 82.02
PREF: 82.03
Default: 150.00 %
Default: TRUE
Default: 0%
890SD Standalone Drive - Frames G, H & J
Range: 0.00 to 300.00 %
Range: FALSE / TRUE
Range: 0 to 300%