Ycls' Tight Closing With Manipulated Variable; Ycdo' Lower Value For Tight Closing / '41.Ycup' Upper Value For Tight Closing - Siemens SIPART PS2 Operating Instructions Manual

Parameter assignment
9.4 Description of parameters
9.4.2.11

'39.YCLS' Tight closing with manipulated variable

Possible settings:
Purpose:
Factory setting:
See the figure in the description of the "'37.YNRM' Standardization of manipulated variable
(Page 164)" parameter and the figure in the description of the "'13.SL0' ... '33.SL20' Setpoint
turning point (Page 162)" parameter.
Note
Activated tight closing function
If the tight closing function is activated, and if parameter "49.
control deviation in the respective overflow direction is switched off. In this case, parameter
"YCDO: < 0%" and parameter "YCUP: > 100%". This functionality is especially
advantageous for valves with soft seats. For long-term monitoring of the end stop positions,
we recommend that you activate the "F. ZERO" and "G.
9.4.2.12

'40.YCDO' Lower value for tight closing / '41.YCUP' Upper value for tight closing

Adjustment range:
Purpose:
Factory setting:
Note
The value in the "YCDO" parameter is always smaller than that in "YCUP". The tight closing
function has a fixed hysteresis of 1%. The "YCDO" and "YCUP" parameters are relative to
the mechanical stops. The "YCDO" and "YCUP" parameters are independent of the values
set in the "'7.SDIR' Setpoint direction (Page 159)" and "'38.YDIR' Direction of manipulated
variable for display and position feedback (Page 165)" parameters.
166
• no
• uP
• do
• uP do
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. Parameter "39.YCLS" becomes effective when
the effective setpoint is at or below parameter "40.YCDO" or at or
above parameter "41.YCUP".
no
0.0 ... 100.0
These parameters are used to set the values for "Lower value for
tight closing " (YCDO) and "Upper value for tight closing" (YCUP)
in %.
With "YCDO": 0.5
is LIM", monitoring of the
OPEN" parameters.
With "YCUP": 99.5
SIPART PS2 with and without HART
Operating Instructions, 02/2016, A5E00074631-AB