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7.3 Process Image and Diagnostic Status Bits
The process image is masked into the INTERBUS log word by word.
Abbreviations
DIx
DOx
DSx
Word 0 (in)
Word 1 (in)
Word 0 (out)
Word 1 (out)
.x
7.3.1 Process Image
0 (In)
1 (In)
0 (Out)
1 (Out)
7.3.2 Diagnostic Status Bits
Each diagnostic status bit is valid for a group of 4 outputs.
Diagnostic Status Bit
DS1
DS2
DS3
DS4
Fieldbus Dependent I/O Module
INTERBUS
Meaning
Status of the digital input "x"
Status of the digital output "x"
Diagnostic status bit for the output group "x"
1. Word of the I/O module in the input process image
2. Word of the I/O module in the input process image
1. Word of the I/O module in the output process image
2. Word of the I/O module in the output process image
Bit position in the word
Word
.15
.14
.13
DIx
16
15
14
DSx
DOx
16
15
14
.12
.11
.10
.9
.8
13
12
11
10
9
13
12
11
10
9
Assigned output group
DO1 ... DO4
DO5 ... DO8
DO9 ... DO12
DO13 ... DO16
INTERBUS
.7
.6
.5
.4
.3
8
7
6
5
4
4
8
7
6
5
4
• 27
.2
.1
.0
3
2
1
3
2
1
3
2
1
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