ABB ACS 400 User Manual page 118

Ac drives for speed control
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Code Description
4004 PID DERIV FILTER
Time constant for the filter of D part. By increasing the filter time constant it is possible to smooth the effect
of the D part and suppress noise.
4005 ERROR VALUE INV
Process error value inversion. Normally, a decrease in feedback signal causes an increase in drive speed.
If a decrease in feedback signal is desired to cause a decrease in speed, set
0 =
NO
1 =
YES
4006 ACTUAL VAL SEL
PID controller feedback (actual) signal selection. The feedback signal can be a combination of two actual
values
1 and
ACT
value 2 is selected by parameter 4008.
1 =
1
ACT
Actual value 1 is used as the feedback signal.
2 =
1-
2
ACT
ACT
Difference of actual values 1 and 2 is used as the feedback signal.
3 =
1+
2
ACT
ACT
Sum of actual values 1 and 2.
4 =
1*
2
ACT
ACT
Product of actual values 1 and 2.
5 =
1/
2
ACT
ACT
Quotient of actual values 1 and 2.
6 =
(
1,
2)
MIN
A
A
Smaller of actual values 1 and 2.
7 =
(
1,
2)
MAX
A
A
Greater of actual values 1 and 2.
8 = sqrt (A1-A2)
Square root of difference of actual values 1 and 2.
9 = sqA1 + sqA2
Sum of square roots of actual values 1 and 2.
4007 ACT1 INPUT SEL
Source for actual value 1 (
1 = AI 1
Analogue input 1 is used as actual value 1.
2 = AI 2
Analogue input 2 is used as actual value 1.
4008 ACT2 INPUT SEL
Source for actual value 2 (
1 = AI 1
Analog input 1 is used as actual value 2.
2 = AI 2
Analog input 2 is used as actual value 2.
ACS 400 User's Manual
2. The source for actual value 1 is selected by parameter 4007 and source for actual
ACT
1).
ACT
2).
ACT
http://nicontrols.com
to 1 (
ERROR VALUE INV
YES
).
107

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