Siemens SIPART Series Operating Instructions Manual page 169

See also
Description of parameters 35 and 36 (Page 165)
Description of parameters 39 (Page 167)
9.4.2.10 Description of parameters 38
38.YDIR - Direction of manipulated variable for display
This parameter is used to set the direction of action of the display and the position feedback
I . The direction can be rising or falling.
Y
The factory setting is "riSE".
9.4.2.11 Description of parameters 39
39.YCLS - Manipulated variable tight closing
This parameter is used to move the valve into its seat with the maximum force of the
actuator (permanent contact of the piezo valves). The tight closing function is activated on
one side or for both end positions. The parameter "39.YCLS" becomes effective if the
effective setpoint is below the parameter "40.YCDO" or above the parameter "41.YCUP".
See figure in Description of parameters 37 (Page 165) and figure in Description of
parameters 13 through 33 (Page 164).
Note
Activated tight closing function
If the tight closing function is activated, then for parameter "49. LIM" the monitoring of
regulation deviation is turned off in the appropriate overflow direction. Here, "YCDO: < 0 %"
and "YCUP: > 100 %" apply. This functionality is especially advantageous for valves with soft
seats. For a long-term monitoring of the end stop positions, we recommend activating the
parameters "F. ZERO" and G. OPEN".
The factory setting is "no".
SIPART PS2 with and without HART
Operating Instructions, 10/2013, A5E00074631-11
Parameterizing/addressing
9.4 Description of parameters
167