130 Program features
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
Group
Drive operation limits
REF’
0
PID2 ref
Mul.
Add
PID2
Select
REF1 (Hz/rpm) /
REF2 (%)
1
)
Mul.
Switch
3)
Switch
PID2 act
PID2
REF1
(Hz/rpm) /
REF2 (%)
1)
output
REF1 (Hz/rpm) / REF2 (%) = Drive reference before trimming
REF’ = Drive reference after trimming
max. speed = par.
(or
if the absolute value is greater)
(or
if the absolute value is greater)
max. torque = par.
(or
if the absolute value is greater)
PID2 ref = 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.
=
, 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
if parameter
value is
and by parameter
value if parameter
value is
2)
)
1
(
)
0 (
Switch
Switch
max.
freq
max.
speed
max.
torque
Summary of Contents for ACS355 series
Page 1: ...ABB machinery drives User s manual ACS355 drives ...
Page 4: ......
Page 16: ...16 ...
Page 32: ...32 Operation principle and hardware description ...
Page 58: ...58 Electrical installation ...
Page 74: ...74 Start up control with I O and ID run ...
Page 106: ...106 Control panels ...
Page 120: ...120 Application macros ...
Page 178: ...178 Program features ...
Page 338: ...338 Fieldbus control with embedded fieldbus ...
Page 368: ...368 Fault tracing ...
Page 404: ...404 Dimension drawings ...
Page 410: ...410 Appendix Resistor braking ...
Page 434: ...434 Appendix Permanent magnet synchronous motors PMSMs ...