MR ECOTAP VPD CONTROL PRO - Page 79

8 Operation
Maschinenfabrik Reinhausen GmbH 2018 795252433/02 EN ECOTAP
®
VPD
®
CONTROL PRO
Behavior with delay times T1 and T2
Delay time T2 can be used to correct major control deviations more quickly.
Ensure that you set a lower value in the "Delay time T2" parameter than in
the "Delay time T1" parameter.
If the measured voltage U
actual
deviates from the set bandwidth for a long
period , a control impulse is output to the motor-drive unit after the set de-
lay time T1 . If the measured voltage U
actual
is still outside the bandwidth,
delay time T2 starts once delay time T1 is complete. Once delay time T2
is complete, a control impulse is again output to the motor-drive unit for the
tap change to return to the tolerance bandwidth.
Figure59: Behavior of the regulation function with delay times T1 and T2
1 +B%: Upper limit 4 Set delay times T1 and T2.
2 U
desired
: Desired value 5 U
actual
: Measured voltage
3 -B%: Lower limit 6 B%: Tolerance bandwidth
A U
actual
is outside the bandwidth. De-
lay time T1 starts.
B Delay time T1 complete. Tap
change triggered.
C Delay time T2 complete. Tap
change triggered.
Setting delay time T2
To set the delay time T2 proceed as follows:
1. Go to Settings > Parameters > Control > Delay time T2.
2. Set delay time T2.
3. Press the Accept button to save the modified parameter.