Deba' Deadband Of Controller; Ya' Manipulated Variable Limiting Start / '33.Ye' Manipulated Variable Limiting End; Ynrm' Manipulated Variable Standardization - Siemens SIPART PS2 Operating Instructions Manual

Parameter assignment
9.3 Description of parameters
9.3.2.5

'31.DEBA' Deadband of controller

Possible settings:
Purpose:
Factory setting:
9.3.2.6

'32.YA' Manipulated variable limiting Start / '33.YE' Manipulated variable limiting End

Adjustment range:
Purpose:
Factory setting:
Note
'YE' must always be set larger than 'YA'.
9.3.2.7

'34.YNRM' Manipulated variable standardization

Possible settings:
Purpose:
160
● Auto
● 0.1 ... 10.0
This parameter is used with the "Auto" setting to adjust the dead‐
band in automatic mode continually and adaptively to the require‐
ments of the control loop. If a regulator oscillation is detected, then
the deadband is incrementally enlarged. The reverse adaptation
takes place using a time criterion.
The deadband is set using the values 0.1 to 10.0. The value is given
in percent. Control oscillations can then be suppressed. The smaller
the deadband, the better the control accuracy.
Auto
0.0 ... 100.0
These parameters are used to limit the mechanical actuator travel
from stop to stop to the configured values. The value is given in
percent. This allows the mechanical travel range of the actuator to
be limited to the effective flow, preventing integral saturation of the
controlling closed-loop controller.
See the figure in the description of the '34.YNRM' Manipulated var‐
iable standardization (Page 160) parameter.
When 'YA': 0.0
● MPOS
● FLoW
Use the '32.YA' Manipulated variable limiting Start / '33.YE' Manip‐
ulated variable limiting End (Page 160) parameters to limit the ma‐
nipulated variable. This limitation causes two different scaling types
'MPOS' and 'FLoW' for the display and for the position feedback
through the current output.
The MPOS scale shows the mechanical positions from 0 to 100%
between the upper and lower endstops of the initialization. The po‐
sition is not influenced by the '32.YA' Manipulated variable limiting
Start / '33.YE' Manipulated variable limiting End (Page 160) param‐
eters. The 'YA' and 'YE' parameters are shown in the MPOS scale.
When 'YE': 100.0
SIPART PS2 with PROFIBUS PA
Operating Instructions, 02/2016, A5E00127926-AB