Technical data

168 • MODBUS Functions
Internal Variables
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
Register address 0x2031 (MODBUS Address 408242, with a word count of upto 64)
Designation Description of the connected busmodules
Access read modules 65 ... 128
Description Length 1-64 words
These 64 registers identify the 2nd block of I/O modules present (modules
65 to 128). Each module is represented in a word. Because item numbers
cannot be read out of digital modules, a code is displayed for them, as
defined below:
Bit position 0 -> Input module
Bit position 1 -> Output module
Bit position 2-7 -> not used
Bit position 8-14 -> module size in bits
Bit position 15 -> Designation digital module
Register address 0x2032 (MODBUS Address 408243, with a word count of upto 64)
Designation Description of the connected I/O modules
Access read modules 129 ... 192
Description Length 1-64 words
These 64 registers identify the 3rd block of I/O modules present (modules
129 to 192). Each module is represented in a word. Because item numbers
cannot be read out of digital modules, a code is displayed for them, as
defined below:
Bit position 0 -> Input module
Bit position 1 -> Output module
Bit position 2-7 -> not used
Bit position 8-14 -> module size in bits
Bit position 15 -> Designation digital module
Register address 0x2033 (MODBUS Address 408244, with a word count of upto 63)
Designation Description of the connected I/O modules
Access Read modules 193 ... 255
Description Length 1-63 words
These 63 registers identify the 4th block of I/O modules present (modules
193 to 255). Each module is represented in a word. Because item numbers
cannot be read out of digital modules, a code is displayed for them, as
defined below:
Bit position 0 -> Input module
Bit position 1 -> Output module
Bit position 2-7 -> not used
Bit position 8-14 -> module size in bits
Bit position 15 -> Designation digital module
Register address 0x2040 (MODBUS Address 408257)
Designation Implement a software reset
Access write (Write sequence 0xAA55 or 0x55AA)
Description With Writing 0xAA55 or 0x55AA the register will be reset.