ABB DriveIT ACH550-01 User Manual page 276

Code Description
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
NO
speed. Error = Ref - Fbk
1 =
YES
speed. Error = Fbk - Ref
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 UNIT SCALE
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 (3.14159).
4007 Value
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.
Units (P4006)
Scale (P4007)
P 4009
P 4008
-1000%
272
– Inverted, a decrease in feedback signal decreases drive
Entry
0 0003
1 0031
2 0314
3 3142
0%
ACH550 User's Manual
Display
3
3.1
3.14
3.142
+1000%
100%
Internal scale (%)
Parameter listing and descriptions
Range
0=NO, 1=YES
0...31
0...4
Unit and scale
defined by par.
4006 and 4007