Function Of The Position Control - Burkert 8791 Manuel D'utilisation

Type 8791
Function
7.2 function of the position control
The position sensor records the current position (POS) of the pneumatic actuator. The position controller compares
this actual position value with the set-point value (CMD) which is a standard signal. If there is a control difference
(Xd1), the actuator is aerated and deaerated via the control system. In this way the position of the actuator is changed
until control difference is 0. Z1 represents a disturbance variable.
CMD
+
-
Position set-
point value
Position control circuit
Figure 3: Signal flow plan of position controller
B1
Xd1
E1
Position
controller
POS
Z1
P
K
Control system Control valve
Solenoid valves
Position sensor
Valve opening
english
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