ABB ACS 400 - Page 118

ACS 400 User’s Manual 107
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
ERROR VALUE INV to 1 (YES).
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
ACT1 and ACT2. The source for actual value 1 is selected by parameter 4007 and source for actual
value 2 is selected by parameter 4008.
1 =
ACT1
Actual value 1 is used as the feedback signal.
2 =
ACT1-ACT2
Difference of actual values 1 and 2 is used as the feedback signal.
3 =
ACT1+ACT2
Sum of actual values 1 and 2.
4 =
ACT1*ACT2
Product of actual values 1 and 2.
5 =
ACT1/ACT2
Quotient of actual values 1 and 2.
6 =
MIN (A1, A2)
Smaller of actual values 1 and 2.
7 =
MAX (A1, A2)
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 (
ACT1).
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 (
ACT2).
1 = AI 1
Analog input 1 is used as actual value 2.
2 = AI 2
Analog input 2 is used as actual value 2.
Code Description
http://nicontrols.com