ABB RCNA-01 Manual do Utilizador descarregar pdf (Página 280)

100

101

276 Parameter listing and descriptions

ACH550-01 User's Manual

Analogue input reference correction

Parameter values 9, 10, and 14…17 use the formula in the following

table.

Where:

• C = Main reference value

COMM for values 9, 10 and = AI1 for values 14…17)

• B = Correcting reference

AI1 for values 9, 10 and = AI2 for values 14…17).

Example: The figure

shows the reference

source curves for

value settings 9, 10,

and 14…17, where:

•C = 25%.

• P 4012

SETPOINT

MIN = 0.

• P 4013

SETPOINT

MAX = 0.

• B varies along the

horizontal axis.

4011 INTERNAL SETPNT unit and scale defined

by par 4006 and 4007

Sets a constant value used for the process reference.

• Units and scale are defined by parameters 4006 and 4007.

4012 SETPOINT MIN -500.0…500.0%

Sets the minimum value for the reference signal source. See parameter

4010.

4013 SETPOINT MAX -500.0…500.0%

Sets the maximum value for the reference signal source. See

parameter 4010.

Code Description Range

Value setting Calculation of the AI reference

C + B C value + (B value - 50% of reference value)

B C value · (B value / 50% of reference value)

C - B (C value + 50% of reference value) - B value

C / B (C value · 50% of reference value) / B value

120

100

100%

9, 14 (+)

16 (-)

10, 15 (

)

17 (/)

1 2 ... 275 276 277 278 279 280 281 282 283 284 285 ... 473 474

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