ABB ACS550-01 User Manual page 93

ACS550 User's Manual
Code Description
4004 PID DERIV FILTER
Defines the filter time constant for the error-derivative part of the PID controller output.
• Before being added to the PID controller output, the error-derivative is filtered with a 1-pole filter.
• Increasing the filter time smooths the error-derivative, reducing noise.
0.0 = – Disables the error-derivative filter.
NOT SEL
0.1...10.0 = Filter time constant (seconds).
4005 ERROR VALUE INV
Selects either a normal or inverted relationship between the feedback signal and the drive speed.
0 = – Normal, a decrease in feedback signal increases drive speed. Error = Ref - Fbk
NO
1 = – Inverted, a decrease in feedback signal decreases drive speed. Error = Fbk - Ref
YES
4006 UNIT
Selects the unit for the PID controller actual values. (PID1 parameters 0128, 0130, and 0132).
• See parameter 3405 for list of available units.
4007 DSP FORMAT
Defines the decimal point location in PID controller actual values.
• Enter the decimal point location counting in from the right of the entry.
• See table for example using pi (3.14259).
4008 0 % VALUE
Defines (together with the next parameter) the scaling applied to
the PID controller's actual values (PID1 parameters 0128, 0130,
and 0132).
• Units and scale are defined by parameters 4006 and 4007.
4009 100 % VALUE
Defines (together with the previous parameter) the scaling applied
to the PID controller's actual values.
• Units and scale are defined by parameters 4006 and 4007.
4007 Value Entry
0 0003
1 0031
2 0314
3 3142
Units (P4006)
Scale (P4007)
P 4009
P 4008
0%
-1000%
Internal scale (%)
93
Display
3
3.1
3.14
3.142
+1000%
100%
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