Fieldbus coupler 750-342 • 33
Data exchange
Modular I/O System
ETHERNET TCP/IP
Note
For the number of input and output bits and/or bytes of the individual activated
bus modules, please refer to the pertaining descriptions of the bus modules.
Note
Once a node is modified, a new architecture of the process image can result. As
such, the address of the process data will alsochange. In the event of adding
modules, the process data of all previous modules has to be taken into account.
Data width
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Data width = 1 Bit / channel
Analog input modules
Digital input modules
Analog output modules
Digital output modules
Input modules for thermal elements
Digital output modules with diagnosis (2 Bit / channel)
Input modules for resistance sensors
Power supply modules with fuse holder / diagnosis
Pulse width output modules
Solid State power relay
Interface module
Relay output modules
Up/down counter
I/O modules for angle and path measurement
Table 3.1: I/O module data width
3.1.5.2.2 Address
range
Address range for I/O module data:
Datawidth Address
Bit
0.0
...
0.8...
0.15
1.0 ...
1.7
1.8...
1.15
.....
254.0 ...
254.7
254.8...
254.15
255.0 ...
255.7
255.8...
255.15
Byte
0
1
2
3
.....
508
509
510
511
Word
0
1
.....
254
255
Table 3.2: Address range for the I/O module data
The register functions are to be found as from 0x1000 and can be addressed
along with the implemented MODBUS function codes (read/write).