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1-22
Programming Your Application
690+ Series Frequency Inverter
CURRENT LIMIT
Designed for all Motor Control Modes.
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 (SETPOINT SCALE
function block).
Note:
The maximum value of current limit for a particular motor is limited by the 690+ current
rating. If a motor of larger rating than the 690+ is connected, then the current limit
applies to the 690+ and not the motor. In this case, the maximum value of the CURRENT
LIMIT parameter is 150.00%.
Current Limit
150.00 %
–
[365] CURRENT
LIMIT
–
TRUE
–
[686] REGEN LIM ENABLE
–
MMI Menu Map
1
SETUP
2
MOTOR CONTROL
3
CURRENT LIMIT
CURRENT
LIMIT
REGEN LIM ENABLE
Parameter Descriptions
CURRENT LIMIT
Range: 0.00 to 300.00 %
This parameter sets the level of motor current, as a % of MOTOR CURRENT (refer to the
MOTOR DATA function block) at which the Inverter begins to take current limit action.
Refer also to “Quadratic/Constant Torque Selection”, page 1-136.
REGEN LIM ENABLE
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.