Operating Instructions ACU
20.1.1 STO Status
Parameter STO Status 277 can be used for extended diagnosis of the two inputs STOA and STOB.
The statuses of the inputs are shown in bit-encoded form.
With correct wiring and correct function, only the 2 states “0” (= STO enabled) and “3” (= STO
disabled) are typically shown (decimal representation) in parameter STO Status 277.
The signal states at digital inputs STOA and STOB can be linked to functions of the frequency
inverter.
Signal state at digital input STOA
Inverted signal state at digital input STOA
Signal state at digital input STOB
Inverted signal state at digital input STOB
Refer to Application manual "Safe Torque Off STO".
20.2 Actual values of machine
The frequency inverter controls the behavior of the machine in the various operating points. As a
function of the configuration selected and the expansion cards installed, control variables and further
actual value parameters of the machine can be displayed.
The output voltage (motor voltage) of the frequency inverter.
Calculated effective output current (motor current) of the frequency
inverter.
Calculated effective value of linked output voltage (motor voltage) of
frequency inverter.
Active power calculated from the voltage, the current and the control
variables.
Active current calculated from the rated motor parameters, the
control variables and the current.
Current component of the field-oriented control forming the
magnetic flux.
Torque-forming current component of field-oriented control.
Calculated from the data on speed sensor 1, the No. of Pole Pairs
373 and the speed sensor signal
Calculation from Encoder 1 Frequency
Difference from the synchronous frequency calculated from the rated
motor parameters, the control variables and the current.
Torque at the current output frequency calculated from the voltage,
the current and the control variables.
Current magnetic flux relative to the rated motor parameters.
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