Reference Trimming; Settings - ABB ACS350 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 / 1108 REF 2 MAX
Switch
max.freq
max.speed
9904
max.torque
PID2 ref
PID2
PID2 act
REF1 (Hz/rpm) / REF2 (%) = The drive reference before trimming
REF' = The drive reference after trimming
max. speed= par.
max. freq = par.
max. torq = par.
PID2 ref = par.
PID2 act = par.
1)
Note: Torque reference trimming is only for external reference REF2 (%).
2)
REF1 or REF2 depending on which is active. See parameter
3)
When par.
REF1 is active and by parameter
When par.
parameter
parameter

Settings

Parameter
1102
4230 ...4233
4201 ...4229
Group
2)
3)
Switch
Switch
Switch
1)
4233
PID2 output
4232 CORRECTION SRC
2002 (or 2001
2008 (or 2007
2014 (or 2013
4210
4214...4221
4232 = PID2REF, the maximum trimming reference is defined by parameter
4232 = PID2 OUTPUT, the maximum trimming reference is defined by parameter
9904 value is VECTOR:SPEED or VECTOR:TORQ and by parameter
9904 value is SCALAR:FREQ.
Additional information
REF1/2 selection
Trimming function settings
PID control settings
20 LIMITS Drive operation limits
Select
DIRECT (2)
REF1 (Hz/rpm) /
PROPOR. (1)
2)
REF2 (%)
0 NOT SEL (0)
4230
4231 TRIM SCALE
if the absolute value is greater)
if the absolute value is greater)
if the absolute value is greater)
1108 when REF2 is active.
REF1 (Hz/rpm) /
Add
2)
REF2 (%)
Mul.
Mul.
1102.
2008 value if
Program features
101
REF'
1105 when
2002 if