Rockwell Automation 5370 CVIM Communications Manual - Manual (Page 144)

Appendix A
Results/Configuration Data Overview
A–3
We have provided the following chart to assist you:
Figure A.1
Fractional Notation
1/65536
1/32768
1/16384
1/8192
1/4096
1/2048
1/1024
1/512
1/256
1/128
1/64
1/32
1/16
1/8
1/4
1/2
Bit # 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
For example: 0000000000000011.0100000000000000 = 3.25
Note: For a sample PLC program which converts 16 point 16 values to
floating point values, refer to Chapter 4.
The CVIM stores some of the data as a 32 bit integer. The first byte contains
bits 16 through 31 of the integer and the next byte contains bits
0 through 15
of the integer.
WORD N WORD N + 1
Bit: 31 30 . . . 17 16 5 14 . . . 1 0
For Example: 0000000000000010 0000000000000000
= 2 17 = 131,072
32 Bit Integer Format