Operating Instructions ACU
16.2.2.1 Scaling
The repetition frequency mode for the multifunction output corresponds to the emulation of an
incremental sensor. Parameter Division Marks 556 must be set according to the frequency to be
output. The minimum frequency of Repetition Freq. Operation is 30 Hz. Smaller values will be output
as 0 Hz.
The pulse-pause ratio is not 1:1. For this reason, Repetition Freq. Operation should only be
evaluated with the rising or falling edge in the evaluation device.
The frequency limit of f
max
=150 kHz must not be exceeded in the calculation of parameter Division
Marks 556.
valueFrequency
Hz 150000
S
max

16.3 Digital Outputs
Op. Mode Digital Output 1 530 and the relay output with parameter Op. Mode Digital Output 3 532
link the digital outputs to various functions. The selection of the functions depends on the
parameterized configuration. When multifunction output MFO1 is to be used as a digital output, an
Operation Mode 550 must be selected and linked via parameter Digital Operation 554.
Operation mode 530, 532,
554
Digital output is switched off
Frequency inverter is initialized and on stand-by or in operation
Signal enable STO (S1IND/STOA and S7IND/STOB) and a start
command are present, output frequency available.
Message is displayed via parameter Current Error 259 and
Warnings 269.
The Stator Frequency 210 is higher than the parameterized
Setting Frequency 510.
Reference frequency
reached
The Actual Frequency 241 of the drive has reached the Internal
Reference Frequency 228.
Reference percentage
reached
The Actual Percentage Value 230 has reached the Reference
Percentage Value 229.
The Warning Limit Short Term Ixt 405 or Warning Limit Long
Term Ixt 406 were reached.
Warning Heat Sink
Temperature
Max. heat sink temperature T
K
of 80 °C minus Warning Limit
Heat Sink Temp. 407 reached.
Inside temperature warning
Max. Inside Temperature T
i
of 65 °C minus Warning Limit
Inside Temp. 408 reached.
Motor temperature warning
Waring behavior as per configured Motor Temp. Operation Mode
570 at max. motor temperature T
PTC .
Message is displayed via parameter Warnings 269.
The selected Warning Limit Heat Sink Temp. 407, Warning Limit
Inside Temp. 408 or maximum motor temperature were
exceeded.
Failure of the mains voltage and power regulation active
according to Operation Mode 670 for the voltage controller.
Warning motor circuit
breaker
Parameterized Operation Mode 571 for motor circuit breaker
was triggered.