ABB ACH550-UH-011A-6 User Manual page 288

ACH550-01 User's Manual
Code Description
4014 FBK SEL
Defines the PID controller feedback (actual signal).
• You can define a combination of two actual values (
the feedback signal.
• Use parameter 4016 to define the source for actual value 1 (
• Use parameter 4017 to define the source for actual value 2 (
1 = 1 – Actual value 1 (
ACT
2 = 1-
ACT ACT
3 = 1+
ACT ACT
4 = 1 *
ACT ACT
5 = 1/
ACT ACT
6 = ( 1,2) – The smaller of
MIN ACT
signal.
7 = ( 1,2) – The greater of
MAX ACT
signal.
8 = sqrt( 1-2) – Square root of the value for
ACT
provides the feedback signal.
9 = sq 1+sq
A A
provides the feedback signal.
10 = sqrt(
ACT
feedback signal.
11 =
COMM FBK
feedback signal.
12 =
COMM FBK
feedback signal.
13 = (
AVE ACT
feedback signal.
4015 FBK MULTIPLIER
Defines an extra multiplier for the PID feedback value FBK defined by
parameter 4014.
• Used mainly in applications where the flow is calculated from the
pressure difference.
0.000 =
NOT SEL
multiplier).
-32.768...32.767 – Multiplier applied to the signal defined by parameter
4014
FBK SEL
Example: FBK
Parameter listing and descriptions
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1) provides the feedback signal.
ACT
2 – 1 minus 2 provides the feedback signal.
ACT ACT
2 – 1 plus 2 provides the feedback signal.
ACT ACT
2 – 1 times 2 provides the feedback signal.
ACT ACT
2 – 1 divided by
ACT
ACT
2 – Square root of
ACT
1) – Square root of the value for
1 – Signal 0158
PID COMM VALUE
2 – Signal 0159
PID COMM VALUE
1,2) – The average of
– The parameter has no effect (1.000 used as the
.
×
Multiplier
=
Range
1...13
ACT
2 provides the feedback signal.
ACT
1 or 2 provides the feedback
ACT
1 or 2 provides the feedback
ACT ACT
1 minus
ACT
1 plus the square root of
1 provides the
ACT
1 provides the
2 provides the
1 and 2 provides the
ACT ACT
-32.768...32.767,
0.000=NOT SEL
ACT1 ACT2
–
1 and 2) as
ACT
1).
ACT
2).
ACT
2
ACT
2
ACT
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