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5-48
Configuration
5.11
Gain Scheduling
Function
FCODE
Option
No
Default
Selected
ValW
Value
Autotune
137
Medium,
critical damping
1
1
Dynamics
Fast, slightly underdamped
2
Slow, slightly overdamped
3
Deadtime
4
If the same
controller
is utilized
in different
processes,
it is important
to reset
the configuration
as well
as the Autotuner
memory.
This
is
important
in switching
between
fast and
slow
loops.
Use
FCODE
144
to reset
the autotuner
if required,
for example
if the controller
is
moved
to another
loop.
Function
FCODE
Option
No
Default
Selected
Value
Value
Resethg
144
Reset disabled
0
0
Reset Autotuner
1
Reset Gain Scheduling
2
Gain
scheduling
is used
to improve
the
control
of non-linear
processes
where
the non-linearity
is fixed.
Processes
that
are
not
time-dependent
are an example
of this
type of process.
The figure
shows
an example
of how
gain
scheduling
uses
a different
set of PID
parameters
to control
the
process,
based
on the range
of the selected
reference
signal.
GS Ref
d
GS
Gain scheduling
Principle
of Operation
May 1991
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