Rockwell-automation 1771-IR , D17716.5.76 RTD INPUT MODULE Manual de usuario descargar pdf (Pagina 52)

Appendix

C1

Data Table Formats

The 4–digit BCD format uses an arrangement of 16 binary digits to represent a

4–digit decimal number from 0000 to 9999 (figure C.1). The BCD format is

used when the input values are to be displayed for operator viewing. Each group

of four binary digits is used to represent a number from 0 to 9. The place values

for each group of digits are 2

, 2

and 2

(Table C.A). The decimal

equivalent for a group of four binary digits is determined by multiplying the

binary digit by its corresponding place value and adding these numbers.

Figure C.1

4-Digit

Binary Coded Decimal

0 X 2

= 0

0 X 2

= 0

0 X 2

= 0

1 X 2

= 1

0 X 2

= 0

0 X 2

= 0

1 X 2

= 2

0 X 2

= 0

0 X 2

= 0

0 X 2

= 0

1 X 2

= 2

1 X 2

= 1

1 X 2

= 8

0 X 2

= 0

0 X 2

= 0

1 X 2

= 1

0001001001111001

12955-I

4-Digit Binary Coded Decimal

(BCD)

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 67 68

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