Operating & Mounting instructions – 8 074 143.03/03 – Page 33
Parameters
A075
PID controller: Scale conversion VIC 0,01...99,99 1,00
Parameter A075 allows the setting of a conversion factor for the proper process presentation of the
PID reference and actual value on the LED display.
Parameters A011 (A101), A012 (A102), d004, F001 and A020...A035 are converted in accordance
with the setting of A075.
A076
PID controller: Feedback destination VIC 00 or 01 00
Parameter A076 defines the type of feedback signal.
Setting Function
00 Current signal at terminals OI - L
01 Voltage signal at terminals O - L
C044
PID controller: Level of deviation VIC 0...100 % 3,0 %
Adjusting the difference between reference and actual value in percent, at which a signal is to be
issued. The setting can be done in a range from 0,0 to 100,0 % with a resolution of 0,1 % (bipolar).
The AVR function (Automatic Voltage Regulation) stabilises the motor voltage in case of fluctuating
intermediate circuit voltage (e.g. due to unstable mains supply or because of intermediate circuit
voltage drops or surges due to short acceleration or deceleration times) in order to maintain such a
high torque - especially during acceleration.
Automatic voltage regulation
AVR
During the delay phase (generatoric operation) the DC link voltage increases (as shown above). This
leads to an increase of the motor voltage. This higher motor voltage causes a higher braking torque.
Therefore, the AVR function for deceleration can be deactivated with function A081.
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General