Reference Trimming; Settings - ABB ACS310 User Manual

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.
1105 REF1 MAX /
2)
1108 REF2 MAX
max. freq
PID2 ref
PID2
PID2 act
4232 CORRECTION SRC
REF1 (Hz/rpm) / REF2 (%) = The drive reference before trimming
REF' = The drive reference after trimming
max. freq = par. 2008
PID2 ref = par. 4210
PID2 act = par. 4214...4221
1)
REF1 or REF2 depending on which is active. See parameter
2)
When par. 4232 = PID2REF, the maximum trimming reference is defined by parameter
1105 when REF1 is active and by parameter
When par. 4232 = PID2OUTPUT, the maximum trimming reference is defined by parameter
2008 value.


Settings

Parameter
1102
4230 ...4232
4201 ...4229
Group 20 LIMITS
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2)
Switch
REF1
(Hz/rpm) /
REF2 (%)
Switch
PID2
output
(or 2007 if the absolute value is greater)
Additional information
REF1/2 selection
Trimming function settings
PID control settings
Drive operation limits
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Select
2 (DIRECT)
1
(PROPORTION
1) )
AL
)
0 (NOT SEL
0
4230
4231 TRIM SCALE
1108 when REF2 is active.
Industry Automation
Program features 123
REF1 (Hz/rpm) /
Add
1
)
REF2 (%)
Mul.
Mul.
1102.
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REF'