Liquid Dosing Control Manual
9.17.150 rev A – September 2020
Page
29
of
34
5.2 Actuator Control Speed
- Write value <_> to parameter 254 – Controller Speed
(Controller speed)
Default value 1
Step
DDE
ProPar Name
Data type
Execute Value Remark
1
254
114/30 Controller Speed
Float
write
0…10 Actuator controller speed [default=1]
5.3 Adjust Proportional and Integral value (Kp and Ti)
Adjust Kp
- Write value <_> to parameter 167 – PID-Kp
(proportional action)
Default value 10
Increase to speed up, decrease to slow down the controller
Adjust Ti
- Write value <_> to parameter 168 – PID-Ti
(integral action)
Typical values
Value 0.05 for lower accuracy but increased speed
Value 0.10 for balance between accuracy and speed (default)
Value 0.15 for higher accuracy but decreased speed
Step DDE ProPar Name
Data
Type Execute Value
Remark
1
167
114/21 PID-Kp
Float
Write
X
Default value 10
Increase to speed up, decrease to
slow down the controller
2
168
114/22 PID-Ti
Float
Write
X
Typical values
Value 0.05 for lower accuracy but
increased speed
Value 0.10 for balance between
accuracy and speed (default)
Value 0.15 for higher accuracy but
decreased speed
Note on controller Derivative action (Td)
This setting is default not used and therefore set to value 0.
In Bronkhorst flow setups it can be useful if the volume between the sensor and valve is relatively
large (e.g. when the sensor and actuator are mounted away from each other).
