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Program features 123
Reference trimming
In reference trimming, the external reference is corrected depending on the
measured value of a secondary application variable. The block diagram below
illustrates the function.
Settings
Parameter
Additional information
REF1/2 selection
Trimming function settings
PID control settings
Drive operation limits
REF’
0
max. freq
PID2 ref
Mul.
Add
PID2
Select
REF1 (Hz/rpm) /
REF2 (%)
1
)
Mul.
Switch
2)
Switch
PID2 act
PID2
REF1
(Hz/rpm) /
REF2 (%)
1)
output
REF1 (Hz/rpm) / REF2 (%) = The drive reference before trimming
REF’ = The drive reference after trimming
(or
if the absolute value is greater)
PID2 ref = par.
PID2 act = par.
…
1)
REF1 or REF2 depending on which is active. See parameter
.
2)
, the maximum trimming reference is defined by parameter
when REF1 is active and by parameter
when REF2 is active.
When par.
, the maximum trimming reference is defined by parameter
value.
2)
)
1
(
)
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