Operating Instructions ACU
Controller
Voltage Pre-Control
The Dyn. Voltage Pre-Control 605 accelerates the control
characteristics.
The output current is limited
Controller
Torque Limitation
The output power or the torque are limited by the speed
controller
Controller
Torque Control
Switch-over of field-oriented control between speed and torque-
controlled control method.
The Operation mode 620 selected in starting behavior limits the
output current.
Contr. intel. curr. lim. LT-
Ixt
Overload limit of the long-term Ixt (60s) reached, intelligent
current limits active
Contr. intel. curr. lim. ST-
Ixt
Overload limit of the short-term Ixt (1s) reached, intelligent
current limits active.
Contr. intel. curr. lim. Tc
Max. heat sink temperature T
K
reached, Operation Mode 573 for
intelligent current limits active.
Contr. intel. curr. lim. motor
temp.
Max. motor temperature T
PTC
reached, Operation Mode 573 for
intelligent current limits active.
Controller
Frequ. Limitation
The reference frequency has reached the Maximum Frequency
419. The frequency limitation is active.
Removal or deactivation of the operation mode within the
warning mask
The current warning mask can be read via parameter Actual Warning Mask 537. The above
Operation Modes of parameter Create Warning Mask 536 are encoded in the Actual Warning Mask
537. The code is calculated by hexadecimal addition of the individual operation modes and the
corresponding abbreviation