8.4. „Gain Scheduling” function
For control systems, Where the object behaves decidedly differen-
tly in various temperatures, it is recommended to use the “Gain Schedu-
ling” function. The controller allows to remember up to four sets of PID
parameters and switch them over automatically. The switching between
PID sets runs percussiveless and with hysteresis, in order to eliminate
oscillations on switching limits.
The Gty parameter settles the way of the function operation.
off
The function is disabled
sp
a) switching depending on the set point value.
For the fi xed set point control one must also choose the num-
ber of PID sets – the Gsnb parameter, and set switching levels
in dependence from the number of PID sets Gl12, Gl23,
Gl34.
b) For the programmed control, one can set the PID set indivi-
dually for each segment. Then, one must set the pid parame-
ter on on for the given prnn program, in the PCfg group.
set
Permanently setting of one PID set, the PID set is put through
the Gset parameter.
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