Data exchange module 750-654
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Structure of the in- and output data for Modbus (from firmware V2.3)
The module is a combined special function input and output module with 2 x 16 Bit in-
and output data.
Input
Description
Word
High
Low
n (Bit0-Bit15)
Input byte0
Input byte1
n+1 (Bit16-Bit31)
Input byte2
Input byte3
Output
Description
Word
High
Low
n (Bit0-Bit15)
Output byte0
Output byte1
n+1 (Bit16-Bit31)
Output byte2
Output byte3
Attention:
For Interbus S the data is written in Motorola format (high Byte first). In connection
with other fieldbus systems the Bytes in the data word are changed.
Attention:
The control byte allows the changing of the registers of the module. It must always be 0
in order to avoid a change in the registers. A wrong mapping can change the function of
the module!
