Technical data

238 • Fieldbus Communication
MODBUS Functions
WAGO-I/O-SYSTEM 750
BACnet/IP Controller
Register address 0x1024 (MODBUS Address 404133)
Designation CnfLen.DigitalOut
Access read
Description Number of digital output bits in the process image
Register address 0x1025 (MODBUS Address 404134)
Designation CnfLen.DigitalInp
Access read
Description Number of digital input bits in the process image
Register address 0x1028 (MODBUS Address 404137)
Designation Boot options
Access read / write
Description Boot configuration:
1: BootP
2: DHCP
4: EEPROM
Register address 0x1029 (MODBUS Address 404138, with 9 words)
Designation MODBUS TCP statistics
Access read / write
Description 1 word SlaveDeviceFailure ! internal bus error, F-bus error
by activated watchdog
1 word BadProtocol; ! error in the MODBUS TCP
header
1 word BadLength; ! Wrong telegram length
1 word BadFunction; ! Invalid function code
1 word BadAddress; ! Invalid register address
1 word BadData; ! Invalid value
1 word TooManyRegisters; ! Number of the registers which
can be worked on is too large, Read/Write 125/100
1 word TooManyBits ! Number of the coils which can
be worked on is too large, Read/Write 2000/800
1 word ModTcpMessageCounter ! Number of received
MODBUS/TCP requests
With Writing 0xAA55 or 0x55AA in the register will reset this data area.