Deba' Deadband Of Closed-Loop Controller; Ya' Start Of Manipulated Variable Limit / '36.Ye' End Of Manipulated Variable Limit - Siemens SIPART PS2 Operating Instructions Manual

9.4.2.7

'34.DEBA' Deadband of closed-loop controller

Possible settings:
Purpose:
Factory setting:
9.4.2.8

'35.YA' Start of manipulated variable limit / '36.YE' End of manipulated variable limit

Adjustment range:
Purpose:
Factory setting:
Note
'YE' must always be set larger than 'YA'.
SIPART PS2 with and without HART
Operating Instructions, 02/2016, A5E00074631-AB
• 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 '37.YNRM' Standardization
of manipulated variable (Page 164) parameter.
When 'YA': 0.0
Parameter assignment
9.4 Description of parameters
When 'YE': 100.0
163