Siemens LMV50 Series Manual page 113

Checking the control
parameters
Example
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Tn and Tv too small
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Building Technologies
Optimum adaption of the controllers to the controlled system can be checked by
recording the actual value during startup while the controlled system is working. The
diagrams below reveal incorrect settings and give hints on remedy.
Here, the behavior of a controlled system of 3rd order for a PID controller is shown. The
procedure for setting the control parameters can also be applied to other types of
controlled systems.
Practical value of Tn : Tv = 4...6.
XP too small
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Figure 56: Modulating control – checking the control parameters
Basic Documentation LMV5...
7 Boiler controller / load controller
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Tn and Tv too great
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Optimum setting
XP too great
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CC1P7550en
22.05.2018