6 Application example: Modbus TCP
6.3 Communication examples: Modbus TCP
122
XI/ON: XNE-GWBR-2ETH-MB
10/2011 MN05002008Z-EN
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6.3.4
Reading-out the process image length (inputs)
Intelligent modules
The process image length of the intelligent input modules is read via function code 04 from
register 1011:
The process image length of the intelligent input modules is:
0×90 bits = 18 bytes = 9 registers
Figure 54:
Process image
length (intelli-
gent input mo-
dules)
Table 63:
Process input
data of intelli-
gent modules
Module
Process input
Words/ registers
0
XN-2AI-I(0/4...20MA)
2
3
XN-2AI-THERMO-PI
2
6
XN-1AI-U(-10/0...+10VDC)
1
9
XN-1SSI
4
Total
9
