Kp Dn - Kp Value (Down); Tv Up - Tv Value (Up); Tv Dn - Tv Value (Down) - ABB TZIDC Manual

TZIDC, TZIDC-200 DIGITAL POSITIONER | COI/TZIDC/TZIDC-200-EN REV. B
KP DN – KP value (down)
Note
In the case of most actuators, all control parameters can be
optimized by using Auto Adjust. Changes should only be made
when auto adjust cannot be executed or control stability cannot
be achieved.
The KP value is the gain of the controller. The control speed and
stability are influenced by the KP value. With higher KP values,
the control speed increases.
Note
The control precision is not affected by the KP value.
To compensate for existing asymmetries in the controlled
system, the KP value should be set separately for both
positioning directions (up / down).
For most actuators, satisfactory control behavior is achieved
with a KP-value between 2.0 and 10.0.
Use the KP DN parameter to adjust the KP-value for the down
positioning direction (towards 0 %).
TV UP – TV value (up)
Note
In the case of most actuators, all control parameters can be
optimized by using Auto Adjust. Changes should only be made
when auto adjust cannot be executed or control stability cannot
be achieved.
The TV value is the derivative time of the controller.
The control speed and stability are affected by the TV value in
such a way that it counteracts the KP value dynamically. The
control speed decreases as the TV value increases.
To compensate for existing dissymmetries in the controlled
system, the TV value should be configured separately for both
positioning directions (up / down).
Use the TV UP parameter to adjust the TV value for the up
positioning direction (towards 100 %).
TV DN – TV value (down)
Note
In the case of most actuators, all control parameters can be
optimized by using Auto Adjust. Changes should only be made
when auto adjust cannot be executed or control stability cannot
be achieved.
The TV-value is the derivative time of the controller.
The control speed and stability are affected by the TV-value in
such a way that it counteracts the KP-value dynamically. The
control speed decreases as the TV-value increases.
To compensate for existing asymmetries in the controlled
system, the TV-value should be configured separately for both
positioning directions (up / down).
Use the TV DN parameter to adjust the TV-value for the down
positioning direction (towards 0 %).
29