Technical data

74 • Fieldbus Controller 750-841
Data Exchange
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
The “WORD.BIT” notation is composed of the boolean’s word address and bit
number in the word, separated by a dot. The Word and Bit values are zero
based (e.g., %IX0.0 is the first possible digital input).
Example:
MODBUS bit number 19 => bit addressing in PLC <Wordno>.<Bitno> = 1.2
The PLC functionality of the PFC can also access the data as Bytes and
Double- Words.
The byte addresses are computed according to the following formula:
High-Byte Address = Word address*2
Low-Byte Address = (Word address*2) + 1
The double word address is computed according to the following formula:
Double word address = High word address/2 (rounded off)
or = Low word address/2