ABB ACH550-01, Руководство пользователя

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Parameter listing and descriptions 273
ACH550 User's Manual
4014 FBK SEL 1…10
Defines the PID controller feedback (actual signal).
• You can define a combination of two actual values (
ACT
1 and
ACT
2) as
the feedback signal.
• Use parameter 4016 to define the source for actual value 1 (
ACT
1).
• Use parameter 4017 to define the source for actual value 2 (
ACT
2).
1 =
ACT
1 – Actual value 1 (
ACT
1) provides the feedback signal.
2 =
ACT
1-
ACT
2 –
ACT
1 minus
ACT
2 provides the feedback signal.
3 =
ACT
1+
ACT
2 –
ACT
1 plus
ACT
2 provides the feedback signal.
4 =
ACT
1*
ACT
2 –
ACT
1 times
ACT
2 provides the feedback signal.
5 =
ACT
1/
ACT
2 –
ACT
1 divided by
ACT
2 provides the feedback signal.
6 =
MIN
(
ACT
1,2) – The smaller of
ACT
1 or
ACT
2 provides the feedback
signal.
7 =
MAX
(
ACT
1,2) – The greater of
ACT
1 or
ACT
2 provides the feedback
signal.
8 = sqrt(
ACT
1-2) – Square root of the value for
ACT
1 minus
ACT
2
provides the feedback signal.
9 = sq
A
1+sq
A
2 – Square root of
ACT
1 plus the square root of
ACT
2
provides the feedback signal.
10 = sqrt(
ACT
1) – Square root of the value for
ACT
1 provides the
feedback signal.
4015 FBK MULTIPLIER -32.768…32.767,
0.000=NOT SEL
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
– The parameter has no effect (1.000 used as the
multiplier).
-32.768…32.767 = Multiplier applied to the signal defined by parameter
4014
FBK SEL
.
Example:
Code Description Range
FBK Multiplier ACT1 ACT2 –
×
=