Endress+Hauser Mycom S CLM 153 Operating Instructions Manual page 56

6 Commissioning
56
The controller in the CLM 153:
The CLM 153 contains a multi-faceted PID controller which can be adapted to the
process. It has the following features:
• Separate configuration of both process sides,
• Simple adaptation to batch or inline processes,
• Switching option between constant and range-dependent modulation gain.
Relating to the effect on the gain factor, a difference is made between two standard
implementations:
• The factor K
(X) is the total gain
R
(see fig. 21. This is implemented in the CLM 153).
• The gain factor K
(X) is the purely proportional gain.
P
The following diagram shows the schematic structure of the CLM 153 controller.
Because of the simplicity of the diagram, the Laplace transform of subfunctions is given.
X
–
+
W E
Fig. 21: Schematic diagram of the CLM 153 controller with K
X Actual value
W Setpoint
E Control difference
Y Actuating variable
K Modulation gain (total gain)
R
T Integral action time (I component)
n
T Derivative action time (D component)
v
K (X)
P
1
+
I
+
1/(T *S)
n
+
D
T *S
v
(X) as the total gain
R
Mycom S CLM 153
R
Y
*
Endress+Hauser