Operating Instructions ACU
A decimal value is displayed, indicating the status of the digital signals in bits after conversion into a
binary figure.
Decimal value 33 is displayed. Converted into the binary system, the number reads
OOIOOOOI. Thus, the following contact inputs or outputs are active:
ï€ Control signal at digital input or output 1
ï€ Control signal at digital input or output 6
22.3 Controller Status
The controller status can be used to establish which of the control functions are active. If a several
controllers are active at the time, a controller code composed of the sum total of the individual
codes is displayed. The display of the controller status by the control unit and the light-emitting
diodes can be parameterized via the Controller-Status Message 409.
Coding of the controller status
Controller key Controller abbreviation
Voltage controller is in the rise phase according to Operation Mode 670
The output frequency in power failure is below the Shutdown Threshold 675
Failure of the mains voltage and power regulation active according to
Operation Mode 670 of the voltage controller
DC-Link voltage exceeded Reference DC-Link Limitation 680.
The Dyn. Voltage Pre-Control 605 accelerates the control system.
The output current is limited by the current limit value controller or the speed
controller.
The output power or the torque are limited by the speed controller
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
Overload limit of the long-term Ixt (60s) reached, intelligent current limits
active
Overload limit of the short-term Ixt (1s) reached, intelligent current limits
active.
Max. heat sink temperature T
K
reached, intelligent current limits of Operation
Mode 573 active.
Max. motor temperature T
PTC
reached, intelligent current limits of Operation
Mode 573 active
Reference frequency has reached the Maximum Frequency 419. The
frequency limitation is active.
The controller status is displayed as
The controller status results from the hexadecimal sum of the controller codes (0004+0020 = 0024).
At the same, the power failure regulation and also the current limitation of the speed controller are
active.