Operating Instructions ACU
Current Limit Generator Op.
Torque Limit Generator Operation
P-Comp. Torque Upper Limit
P-Comp. Torque Lower Limit
Power Limit Generator Operation
18.5.4.2 Limit value sources
As an alternative to limiting the output values by a fixed value, linking to an analog input value is
also possible. The analog value is limited via parameters Minimum Reference Percentage 518,
Maximum Reference Percentage 519, but does not consider the Gradient Percentage Ramp 477 of
the reference percentage channel.
The assignment is done via parameter Isq Limit Source Motor Operation 734 and Isq Limit Source
Generator Op. 735 for the torque-forming current component Isq.
The sources for the torque limits can be selected via parameter Torque Limit Source Motor Op. 736
and Torque Limit Source Gen. Op. 737.
Multifunction input 1 in analog Operation Mode 452 is the
source.
Repetition frequency input
(F3)
The frequency signal on the repetition frequency input
corresponding to Operation Mode 496.
The selected parameter figures for limiting the speed controller
are taken into account.
The limit values and assignment to different limit value sources are data set related in
the configurations. The use of the data record change-over demands an examination
of the parameters in question.
motor
motor
generator
generator
Torque Limit 730
Torque Limit 730
Torque Limit Generator
Operation 731
Torque Limit Generator
Operation 731
M
n
Anticlockwise
operation
Clockwise
operation
Speed is limited by
Maximum Frequency 419
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