Conf - Change I/O - Double Polynomial Coefficients Option - ABB 691HT Operating Instructions Manual

DOUBLE POLY COEFFS
NEXT LAST CHNG
OPTN OPTN
WARNING - control loop
should be in manual
WARNING - all double
poly coeffs are sent
after the Pol. Lim
is entered.
DOUBLE POLY B0:
± ±
[ 0.000000E 00]
< - - - - > CLR ENTER
1ST POLY HIGH LIMIT:
[100.0 ]%
< - - - - > CLR ENTER
Press F4 for send
or ESC to abort
DOUBLE POLY COEFFS
NOT SENT
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CONF - Change I/O - DOUBLE POLYNOMIAL COEFFICIENTS option

(600T EN Pressure Transmitter only)
The double polynomial function is expressed with the following:
if Out < FIRST POLY LIMIT
then Out = B0 + B1 (x) + B2 (x
else
Out = C0 + C1 (x) + C2 (x
P R O
C E E D
Proceed as for the previous option by selecting the Double Poly Coeffs
option from the configuration main menu.
A warning message informs the user that the last value to be entered,
before sending the coefficients, is the POLYNOMIAL LIMIT.
After some seconds the following display appears allowing the entry of
the B0 coefficients, and in sequence all the other coefficients values.
All the values are expressed in scientific notation.
Function keys from F1 to F4 have the same functionality as already
explained for the POLY COEFFICIENTS option.
When the last coefficient has been entered, the user is asked to input the
FIRST POLY HIGH LIMIT.
Acceptable values are between 0 and 100%.
Refer to 600T EN Series Instruction Manual for additional information.
SEND
The operation is completed when F4 (SEND DATA) is pressed.
DATA
With ESCAPE the user can abort the operation and a message appears
on the display.
2 )
2
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