Burkert 8630 Instructions De Service page 133

Position setpoint
Fig. 6.15: Deadband by position control
P.control
Parameters setting of the process controller
P.co - dbnd
Deadband of the process controller
This function ensures that the postioner acts only then a selected control difference is measured (Fig. 6.15). This function
protects the servovalve and pneumatic actuator by controlling the start-up frequency.
132
Control
difference
Xd1
Actual
position
Factory setting: 1% (relative to the range of the selected
Xd1'
Xd1
DBND
Dead band of the controller
Parameters of the PID controller
Mode of setpoint entry
Filtering of the process actual value input
Scale of the controller
Storage of the new parameters
End of the parametering setting of the controller
process set-point input
Entry of the deadband in %
Operating instructions no. 800607
to the controller
Xd1'