Addressing The I/O Modules; Address Range; I/O Module Data Width - WAGO 750 Series Manual

3.1.6.2 Addressing

3.1.6.2.1 Addressing the I/O Modules

The arrangement of the I/O modules in a node is flexible and up to the user.
Although, the user must verify that the power jumper contacts from one I/O
module to the next are compatible and at the same voltage level.
When the controller addresses I/O modules, data of complex modules (modules
occupying 1 or more bytes) are mapped first. They are mapped in the order of
their physical position after the controller. As such, they occupy the addresses
beginning with word 0. Following this, the digital modules are grouped in the
form of words (16 bits per word). They are also arranged by their physical
order. When the number of digital I/O's exceeds 8 bits, the controller
automatically starts another byte.
Note
For detailed information on the number of input and output bits/bytes of a
specific module, please refer to the modules manual.
Note
Changing the physical layout of a node will result in a new structure of the
process image. Also, the addresses of the process data will change. When
adding or removing modules, the process data must be verified.
Data width ≥ 1 Word / channel
Analog input modules
Analog output modules
Input modules for thermal elements
Input modules for resistance sensors
Pulse width output modules
Interface module
Up/down counter
I/O modules for angle and path measurement
Table 3.1: I/O Module Data Width

3.1.6.2.2 Address Range

Partition of Address ranges for the word-wise addressing acc. to IEC 61131-3 :
Word
0-255
256-511
512-1275
1276-1531
1532-.....
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
Data
physical I/O modules
MODBUS/TCP PFC variables
remaining physical I/O modules
Ethernet/IP PFC variables
reserved for PFC variables of future protocols
Fieldbus Controller 750-841
Data Exchange
Data width = 1 Bit / channel
Digital input modules
Digital output modules
Digital output modules with diagnosis (2 Bit / channel)
Power supply modules with fuse holder / diagnosis
Solid State power relay
Relay output modules
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