
GOSSEN-METRAWATT GMBH
35
1)
If one of the times T
I
or T
II
is considerably longer than the other one, the value for
tu
is too high.
Correction with limitation of the regulation ratio
Y H
positive:
Multiply
Pb I
by 100 %
/
Y H
Y H
negative: Multiply
Pb II
by –100 %
/
Y H
Correction for step controller if one of the times T
I
or T
II
is smaller than
tY
:
t Y
•
t Y
t Y
•
t Y
Multiply
Pb I
by
, if T
I
is smallest, multiply by
, if T
II
is smallest
T
I
•
T
I
T
II
•
T
II
The value for
tu
is very inaccurate in this case. It should be re-optimized in control operation.
Control operation
After optimizing is ended, the controller can be used:
– Configure the desired control algorithm with
Controller type
.
– Set the
set point
to the required value.
– For three-state, split range and step controllers, the deadband can be increased from
dbnd
= 0
should the control of the switching outputs I
(and/or continuous output) and II change too fast due to an instable actual value.
Содержание R2600
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