Rockwell-automation 1771-IR , D17716.5.76 RTD INPUT MODULE Manual de usuario descargar pdf (Pagina 53)

Data Formats

Appendix C

C2

Table C.A

BCD

Representation

Place V

alue

(8) 2

(4)

(2)

(1)

Decimal

Equivalent

0 0 0 0 0

0 0 0 1 1

0 0 1 0 2

0 0 1 1 3

0 1 0 0 4

0 1 0 1 5

0 1 1 0 6

0 1 1 1 7

1 0 0 0 8

1 0 0 1 9

Signed–magnitude binary is a means of communicating numbers to your

processsor. It should be used with the PLC–2 family when performing

computations in the processor. It cannot be used to manipulate binary 12–bit

values or negative values.

Example: The following binary number is equal to decimal 22.

10110

= 22

The signed–magnitude method places an extra bit (sign bit) in the left–most

position and lets this bit determine whether the number is positive or negative.

The number is positive if the sign bit is 0 and negative if the sign bit is 1. Using

the signed magnitude method:

0 10110 = +22

1 10110 = –22

Signed-magnitude Binary

1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 67 68

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Rockwell-automation 1771-IR , D17716.5.76 RTD INPUT MODULE Manual de usuario Pagina 53