Burkert Type 8625 - Manual (Page 32)

30 - 8625-2 Standard
english
From K
crit
and T
crit
, the controller parameters can then be calculated using the
following table.
Parameter setting according to Ziegler and Nichols:
The adjustment rules of Ziegler and Nichols have been determined for P members
with first order time increase and dead time. However, they apply only for
controllers with disturbance behaviour and not for those with command behaviour.
Controller type Parameter setting
P K
p
= 0,5 K
krit
-
PI K
p
= 0,45 K
krit
T
N
= 0,85 T
krit