IB IL 24 AI 2/SF-230
16
6232A
Formats for Representing the Measured Values
"IB IL" Format
The measured value is represented in bits 14 through 0. An additional bit (bit 15) is available as a
sign bit.
This format supports extended diagnostics. Values > 8000
hex
indicate an error. The error codes are
listed on page 15.
Figure 12
Measured value representation in "IB IL" format (15 bits)
This format is preset (default). To ensure that the terminal can be operated in previously used data
formats, the measured value representation can be switched to different formats.
Significant Measured Values
Some codes are used for diagnostic functions. Therefore, the resolution is not 15 bits but
exactly 14.9886847 bits.
Measuring range 0 mA through 20 mA/0 V through 10 V
SB
Sign bit
AV
Analog value
0
1 4
1 3
1 2
1 1
1 0
9
8
7
6
5
4
3
2
1
5 5 6 4 1 0 0 8
1 5
S B
A V
Input Data Word
(Two’s Complement)
0 mA Through 20 mA
I
Input
0 V Through 10 V
U
Input
hex
dec
mA
V
8001
Overrange
>
+21.6746
>
+10.837
7F00
32512
+21.6746
+10.837
7530
30000
+20.0
+10.0
0001
1
+0.66667 µA
+333.33 µV
0000
0
0
0
0000
0
<
0
<
0