ABB ACH550-01 User Manual page 282

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 speed.
NO
Error = Ref - Fbk.
1 = – Inverted, a decrease in feedback signal decreases drive
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 from the right end of the
entry.
• See the table for an example using pi (3.14159).
4007 Value
0
1
2
3
4008 0% VALUE
Defines (together with the next parameter) the scaling applied to the
actual values of the PID controller (PID1 parameters 0128, 0130 and
0132).
• Units and scale are defined by parameters 4006 and 4007.
Units (P4006)
Scale (P4007)
P 4009
P 4008
-3276.8%
270
Entry Display
0003 3
0031 3.1
0314 3.14
3142 3.142
0%
Parameter listing and descriptions
ACH550 User's Manual
Range
0=NO, 1=YES
0...31
0...4
unit and scale defined
by par. 4006 and 4007
+3276.7%
Internal scale (%)
100%