Wika T53 User Manual download pdf (Page 23)

function is particularly suitable for specific RTD sensors but also for non-linear ohmic signals if the user

can accept to enter the input and output values of the polynomials in ohm and °C respectively.

Please remember that polynomial linearisation is absolute. The output value is calculated continuously

according to the applied input value and the function formula. The max. input range can be limited pre

cisely to the input range in which the polynomial linearisation will be used. The PRIMARY_VALUE_UNIT

defines the unit of the values provided by the AI_TRANSDUCER BLOCK. The parameter OUT_SCALE in

the AI block can scale the values and change the unit to e.g. mV or ohm.

2.9.4 Custom Polynomial Linearisation, Parameter List

Parameter

Rel.

Index

Description Type Store

Size

byte

RO /

R/W

Min. Max. Default

CUSTOM_TC_NAME

8 Name of Custom defined TC ( LIN_TYPE = 240)

OCTET_

STRING

SRC 20 R/W

”Linear TC;

no RJ”

CUSTUM_TC_POLY_

COUNT

Number of 4. order polynomial parts for Custom

defined TC

Un-

signed

SRC 1 R/W 5

CUSTOM_TC_MIN_IN

10 Minimum input limit in µV for Custom defined TC Float SRC 4 R/W 0

CUSTOM_TC_MIN_OUT

Minimum usable output value in °C of polynomial set

for Custom defined TC

Float SRC 4 R/W 0

CUSTOM_TC_MAX_OUT

Maximum usable output value in °C of polynomial set

for Custom defined TC

Float SRC 4 R/W 1500,00

CUSTOM_TC_POLY_1

Polynomial part 1 of Custom defined TC converting µV

to °C. Consisting of: maximum input value in µV, a4..a0

polynomial coefficients.

6*Float SRC 24 R/W

30000;

0; 0; 0;

0,01; 0

CUSTOM_TC_POLY_2

Polynomial part 2 of Custom defined TC converting µV

to °C. Consisting of: maximum input value in µV, a4..a0

polynomial coefficients.

6*Float SRC 24 R/W

60000;

0; 0; 0;

0,01; 0

CUSTOM_TC_POLY_3

Polynomial part 3 of Custom defined TC converting µV

to °C. Consisting of: maximum input value in µV, a4..a0

polynomial coefficients.

6*Float SRC 24 R/W

90000;

0; 0; 0;

0,01; 0

CUSTOM_TC_POLY_4

Polynomial part 4 of Custom defined TC converting µV

to °C. Consisting of: maximum input value in µV, a4..a0

polynomial coefficients.

6*Float SRC 24 R/W

120000;

0; 0; 0;

0,01; 0

CUSTOM_TC_POLY_5

Polynomial part 5 of Custom defined TC converting µV

to °C. Consisting of: maximum input value in µV, a4..a0

polynomial coefficients.

6*Float SRC 24 R/W

150000;

0; 0; 0;

0,01; 0

CUSTOM_TC_Rj_POLY

RJ Polynomial part of custom defined TC, converting

°C to µV.: a3..a0 coefficients.

4*Float SRC 16 R/W 0;0;0;0

CUSTOM_RTD_NAME

19 Name of Custom defined RTD ( LIN_TYPE = 241)

OCTET_

STRING

SRC 20 R/W

”Linear

RTD”

CUSTUM_RTD_POLY_

COUNT

Number of 4. order polynomial parts for Custom

defined RTD

Un-

signed

SRC 1 R/W 5

CUSTOM_RTD_MIN_IN

21 Minimum input limit in Ohm’s for Custom defined RTD Float SRC 4 R/W 0

CUSTOM_RTD_MIN_OUT

Minimum usable output value of polynomial set for

Custom defined RTD

Float SRC 4 R/W 0

CUSTOM_RTD_MAX_OUT

Maximum useable output value of polynomial set for

Custom defined RTD

Float SRC 4 R/W 100,00

CUSTOM_RTD_POLY_1

Polynomial part 1 of Custom defined RTD convert

ing Ohm to °C. Consisting of maximum input value in

Ohms, a4..a0 polynomial coefficients.

6*Float SRC 24 R/W

2000;

0; 0; 0;

0,01; 0

CUSTOM_RTD_POLY_2

Polynomial part 2 of Custom defined RTD convert

ing Ohm to °C. Consisting of maximum input value in

Ohms, a4..a0 polynomial coefficients.

6*Float SRC 24 R/W

4000;

0; 0; 0;

0,01; 0

CUSTOM_RTD_POLY_3

Polynomial part 3 of Custom defined RTD convert

ing Ohm to °C. Consisting of maximum input value in

Ohms, a4..a0 polynomial coefficients.

6*Float SRC 24 R/W

6000;

0; 0; 0;

0,01; 0

CUSTOM_RTD_POLY_4

Polynomial part 4 of Custom defined RTD convert

ing Ohm to °C. Consisting of maximum input value in

Ohms, a4..a0 polynomial coefficients.

6*Float SRC 24 R/W

8000;

0; 0; 0;

0,01; 0

CUSTOM_RTD_POLY_5

Polynomial part 5 of Custom defined RTD convert

ing Ohm to °C. Consisting of maximum input value in

Ohms, a4..a0 polynomial coefficients.

6*Float SRC 24 R/W

10000;

0; 0; 0;

0,01; 0

2.10 PR_CUST_PRIV Block (PA Slot 5) Reserved Parameter List

2.10.1 Description, PR_CUST_PRIV Block

The Block is private and reserved.

1 2 ... 18 19 20 21 22 23 24 25 26

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