Technical data

Fieldbus Communication • 239
MODBUS Functions
WAGO-I/O-SYSTEM 750
BACnet/IP Controller
Register address 0x102A (MODBUS Address 404139, with a word count of 1)
Designation MODBUS/TCP Connections
Access read
Description Number of TCP connections
Register address 0x1030 (MODBUS Address 404145, with a word count of 1)
Designation Configuration MODBUS/TCP Timeout
Access read / write
Default 0x0000
Description This is the maximum number of milliseconds the fieldbus coupler will allow
a MODBUS/TCP connection to stay open without receiving a MODBUS
request. Upon timeout, idle connection will be closed. Outputs remain in
last state. Default value is 0 (timeout disabled).
Register address 0x1031 (MODBUS Address 404146, with a word count of 3)
Designation Read the MAC-ID of the controller
Access read
Description This register gives the MAC-ID, with a length of 3 words
Register address 0x1050 (MODBUS Address 404177, with a word count of 3)
since Firmware version 9
Designation Diagnosis of the connected I/O Modules
Access read
Description Diagnosis of the connected I/O Modules, Length 3 words
word 1: Number of the module
word 2: Number of the channel
word 3: Diagnosis
Register address 0x2030 (MODBUS Address 408241, with a word count of up to 65)
Designation Description of the connected I/O modules
Access Read modules 0 ... 64
Description Length 1-65 words
These 65 registers identify the controller and the first 64 modules present in
a node. Each module is represented in a word. Because item numbers can-
not 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