Operators Handbook DCU3 – System
6., Main function „Control Loops“
BAEDCU3 - Rev. 4.6 - 0504
6 - 14
6.10.1.1 Parametrization Display pO
2
- Cascade Controller with 3 Servo Controllers
Tag
Entry
Displayed value or function, required input
DEADB
%
Input of dead band in relation to measuring range (0 - 100 % sat)
Hyst. Time
m:s
Delay time for cascade switch over in [minutes:seconds]
Cascade
[Controller] Display of the selected servo controller with its parameters
Minimum
%
Input of minimum output limit, considering the minimum setpoint
for servo controller (0 - 100 % = measuring range process value)
Maximum
%
Input of maximum output limit, i.e. the maximum setpoint for
servo controller (0 - 100 % = measuring range process value)
XP
%
Input of proportional range for servo controller [PARAM] in rela-
tion to measuring range
TI
sec
Input of reset time ifor servo controller [PARAM]
TD
sec
Input of rate time for servo controller [PARAM]
6.10.1.2 Operation of the Multistep Cascade Control
1.
Assign the servo controllers to CASCADE, according to their intended priority.
2.
Adjust the permitted minimum and maximum controller setpoint limits for the selected servo
controllers via their output limits MIN/MAX in the parametrization display of the pO
2
-
controller.
3.
When the pO
2
-controller is switched on, the setpoint currently controlled by the pO
2
control-
ler is indicated by „active“ on the display.
4.
To achieve a reverse control, you can set the MIN->MAX limits correspondingly.
Содержание DCU 3
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