Ycdo' Value For Tight Closing/Fast Closing Down; Ycup' Value For Tight Closing/Fast Closing Up - Siemens SIPART PS2 Series Operating Instructions Manual

Parameter assignment
8.4 Description of parameters
See the figure in the description of the '37.YNRM' Standardization of manipulated variable
(Page 151) parameter and the figure in the description of the '13.SL0' ... '33.SL20' Setpoint
turning point (Page 149) parameters.
Note
Activated tight closing/fast closing function
If the function is activated, then the monitoring of control deviation is turned off in the respective
overflow direction for the ''49.\\LIM' Response threshold of fault message 'Control deviation'
(Page 159)' parameter. The following applies: 'YCDO: < 0 %' and 'YCUP: > 100 %'. This
functionality is especially advantageous for valves with lining. For long-term monitoring of the
positions of the endstops, we recommend that you activate the 'F. ZERO' and 'G. OPEN'
parameters.
8.4.2.12

'40.YCDO' Value for tight closing/fast closing Down

Requirement:
Adjustment range:
Purpose:
Factory setting:
Note
The value in the 'YCDO' parameter is always smaller than that in 'YCUP'. The tight closing/fast
closing function has a fixed hysteresis of 1%. The 'YCDO' parameter is relative to the
mechanical stops. The 'YCDO' is independent of the values set in the '7.SDIR' Setpoint
direction (Page 147) and '38.YDIR' Direction of manipulated variable for display and position
feedback (Page 153) parameters.
8.4.2.13

'41.YCUP' Value for tight closing/fast closing Up

Requirement:
Adjustment range:
Purpose:
Factory setting:
154
'39.YCLS' Tight closing/fast closing with manipulated variable
(Page 153) Parameter is set to 'do', 'uP do', 'Fd', 'Fu Fd', 'uP Fd' or
'Fu do'
0.0 ... 100.0
Use the 'YCDO' parameter to set the value as of which the "Tight
closing/fast closing Down" function is activated. If the effective set‐
point is at or below the value set here, the actuator moves in tight
closing Down or fast closing Down.
0.5
'39.YCLS' Tight closing/fast closing with manipulated variable
(Page 153) Parameter is set to 'do', 'uP do', 'Fd', 'Fu Fd', 'uP Fd' or
'Fu do'
0.0 ... 100.0
Use the 'YCUP' parameter to set the value as of which the tight
closing Up or fast closing Up is activated. If the effective setpoint is
at or above the value set here, the actuator moves in tight closing
Up or fast closing Up.
99.5
SIPART PS2 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E00074631-AE