168 Fieldbus Communication
WAGO-I/O-SYSTEM 750 XTR
750-352/040-000 FC ETHERNET G3 XTR
Manual
Version 1.3.0
Note that if the register ranges overlap, the results are undefined!
If register areas for read and write overlap, the results are undefined.
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11.2.4 MODBUS Register Mapping
The following tables display the MODBUS addressing and the internal variables.
Via the register services the states of the complex and digital I/O modules can be
determined or changed.
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Register Access Reading (with FC3 and FC4)
Table 106: Register Access Reading (with FC3 and FC4)
MODBUS address
IEC 61131
Memory range
[dec]
[hex]
address
0...255
0x0000...0x00FF
%IW0...%IW255
Physical input area (1)
First 256 Words of physical input data
256...511
0x0100...0x01FF
-
MODBUS exception:
“Illegal data address”
512...767
0x0200...0x02FF
%QW0...%QW255
Physical output area (1)
First 256 Words of physical output data
768...4095
0x0300...0x0FFF
-
MODBUS exception:
“Illegal data address”
4096...12287 0x1000...0x2FFF
-
Configuration register (see Section
„Configuration Register“)
12288...24575 0x3000...0x5FFF
-
MODBUS exception:
“Illegal data address”
24576...25339 0x6000...0x62FB %IW256...%IW1020 Physical input area (2)
Additional 764 Words physical input data
25340...28671 0x62FC...0x6FFF
-
MODBUS exception:
“Illegal data address”
28672...29435 0x7000...0x72FB %QW256...%QW1020 Physical output area (2)
Additional 764 Words physical output data
29436...65535 0x72FC...0xFFFF
-
MODBUS exception:
“Illegal data address”
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