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Siemens SIPART PS2 6DR52xx User Manual

Page 120

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Operation

120

SIPART PS2 Manual

A5E00074631--06

Monitoring of the changes of direction
This parameter activates the monitoring of the changes of direction.

This function allows the preventive maintenance of the control valve,

also see chapter 4.5 “Diagnosics”, page 122.

Limit for the changes of direction
Input of the limit for the number of changes of direction.
On the one hand, it is possible to enter a maximal number for the

changes of direction and to use factors smaller than one to receive

warning messages when a certain fraction of the maximal number is

reached. On the other hand, a minimum value can be entered for the

changes of direction. Factors greater than one are then used to receive

warning messages for certain limits above the minimum value. Factory

setting for the limit is 1 000 000.

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

to the limit for the number of changes of direction. Factory setting

for factor 1 is 1.0. That means, for O1.LIMIT = 1 000 000 and fac-

tor 1 = 1.0, the first direction change error message is triggered after

1 000 000 strokes.

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

to the limit for the number of changes of direction. Factory setting

for factor 2 is 2.0. That means, for O1.LIMIT = 1 000 000 and fac-

tor 2 = 2.0, the second direction change error message is triggered

after 2 000 000 strokes.

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

to the limit for the number of changes of direction. Factory setting

for factor 3 is 5.0. That means, for L1.LIMIT = 1 000 000 and fac-

tor 3 = 5.0, the third direction change error message is triggered after

5 000 000 strokes.

Calculation of the position average
This parameter is used to activate the function for the calculation of the

position average. The function allows the calculation of a reference

average for the position sequence within preset intervals and the

calculation of comparison average values for the following intervals.

If the comparison average values deviate from the reference average,

error messages are displayed, depending on the set thresholds.

O. DCHG

O1.LIMIT

O2.FACT1

O3.FACT2

O4.FACT3

P. PAVG

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