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Siemens SIPART PS2 6DR52xx User Manual

Page 112

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Operation

112

SIPART PS2 Manual

A5E00074631--06

General control valve malfunction
This parameter activates the dynamic monitoring of the control valve

reaction. To do this, the actual position sequence is compared to the

guide value and the expected position sequence, which allows

conclusions with regard to the correct operational behavior of the

control valve.
When the parameter is activated, the submenu for the general control

valve malfunctions from b1 to b5 opens. The function can be

configured there.

Time constant of the low-pass filter
The time constant of the low-pass filter is determined during the

automatic initialization of the device. In the factory setting, parameter

b1 therefore indicates “Auto”.
If the user is very familiar with the process sequence or desires a

certain filter time constant for application-specific reasons, parameter

b1 can be set from one second to 400 seconds manually. One second

causes no damping, 400 seconds result in a strong damping effect.

Limit for the general control valve malfunction
Sets the limit for the deviation from the model behavior. This limit is a

reference value for the error message factors. Factory setting is 1.0 %.

Factor 1
Input of the factor for the threshold 1 error message. This factor refers

to the limit for the general control valve malfunction. Factory setting for

factor 1 is 5.0. That means, for b2.LIMIT = 1.0% and factor 1 = 5.0, the

first error message is triggered at a control deviation of 5.0 % from the

model behavior.

Factor 2
Input of the factor for the threshold 2 error message. This factor refers

to the limit for the general control valve malfunction. Factory setting for

factor 2 is 10.0. That means, for b2.LIMIT = 1.0% and factor 2 = 10.0,

the second error message is triggered at a control deviation of 10.0 %

from the model behavior.

Factor 3
Input of the factor for the threshold 3 error message. This factor refers

to the limit for the general control valve malfunction. Factory setting for

factor 3 is 15.0. That means, for b2.LIMIT = 1.0% and factor 3 = 15.0,

the third error message is triggered at a control deviation of 15 % from

the model behavior.

b. DEVI

b1.TIM

b2.LIMIT

b3.FACT1

b4.FACT2

b5.FACT3

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