17
Positioner Type 8792
Type 8792, 8793 REV.2
7
POSITIONER TYPE 8792
The position sensor records the current position (
POS
) of the pneumatic actuator. The positioner compares this
position actual value with the set-point value (
CMD
) which is specified as a standard signal. If there is a control
difference (Xd1), the actuator is aerated and de-aerated via the actuating system. In this way the position of
the actuator is changed until control difference is 0. Z1 represents a disturbance variable.
Valve opening
Continuous
valve
Actuating
system
Solenoid
valves
Position sensor
Positioner
Position
set-point
value
CMD
Xd1
B1
E1
P
K
Z1
POS
Position control circuit
+
-
Figure 3:
Position control circuit in Type 8792
english
Summary of Contents for 8792
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