ABB RCNA-01 Uživatelský manuál stáhnout pdf (Strana 281)

100

101

Parameter listing and descriptions 277

ACH550-01 User's Manual

4014 FBK SEL 1…13

Defines the PID controller feedback (actual signal).

• You can define a combination of two actual values (

ACT1 and ACT2) as

the feedback signal.

• Use parameter 4016 to define the source for actual value 1 (

ACT1).

• Use parameter 4017 to define the source for actual value 2 (

ACT2).

1 =

ACT1 – Actual value 1 (ACT1) provides the feedback signal.

2 =

ACT1-ACT2 – ACT1 minus ACT2 provides the feedback signal.

3 =

ACT1+ACT2 – ACT1 plus ACT2 provides the feedback signal.

4 =

ACT1

ACT2 – ACT1 times ACT2 provides the feedback signal.

5 =

ACT1/ACT2 – ACT1 divided by ACT2 provides the feedback signal.

6 =

MIN(ACT1,2) – The smaller of ACT1 or ACT2 provides the feedback

signal.

7 =

MAX(ACT1,2) – The greater of ACT1 or ACT2 provides the feedback

signal.

8 = sqrt(

ACT1-2) – Square root of the value for ACT1 minus ACT2

provides the feedback signal.

9 = sq

A1+sqA2 – Square root of ACT1 plus the square root of ACT2

provides the feedback signal.

10 = sqrt(

ACT1) – Square root of the value for ACT1 provides the

feedback signal.

11 =

COMM FBK 1 – Signal 0158 PID COMM VALUE 1 provides the

feedback signal.

12 =

COMM FBK 2 – Signal 0159 PID COMM VALUE 2 provides the

feedback signal.

13 =

AVE(ACT1,2) – The average of ACT1 and ACT2 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–×=

1 2 ... 276 277 278 279 280 281 282 283 284 285 286 ... 473 474

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