IB IL 24 AI 2/SF-230
18
6232A
"IB ST" Format
The measured value is represented in bits 14 through 3. The remaining 4 bits are sign bit, measuring
range, and error bits.
This format corresponds to the data format used on INTERBUS ST modules.
Figure 13
Measured value representation in "IB ST" format (12 bits)
Significant Measured Values
Measuring range 0 mA through 20 mA/0 V through 10 V
SB
Sign bit
OC
Open circuit
AV
Analog value
OR
Overrange
0/4
Measuring range 4 through 20 mA
Input Data Word
(Two’s Complement)
0 mA Through 20 mA
I
Input
0 V Through 10 V
U
Input
hex
mA
V
7FF9
>21.5
>10.75
7FF8
20.0 through 21.5
10.00 through 10.75
7FF8
19.9951
9.9975
4000
10.0
5.0
0008
0.0048828
0.002441
0000
0
0
0
1 4
1 3
1 2
1 1
1 0
9
8
7
6
5
4
3
2
1
5 5 6 4 0 0 0 7
1 5
O R
0 / 4
O C
S B
A V