English (GB)
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15.1.3 Design and function of a controller
The controller calculates the manipulated variable
for the setpoint and the actual value. Based on the
setpoint and the actual value, the controller
generates an output signal which the corresponding
final control element processes.
Fig. 37
Function of a controller
The control function calculates the manipulated
variable on the basis of the deviation. The various
control actions and their corresponding parameters,
define the dependance between the manipulated
variable and the deviation.
TM
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...
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Pos.
Description
1
Setpoint
2
Actual value
3
Deviation
4
Manipulated variable
5
Parameter settings
6
Two-position
7
Three-position
8
Continuous
9
Output signal
10
Setpoint/actual value comparator
11
Control function
12
Output module
13
Controller
