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Communication Access Registers
870 USE 103 00 May 2001 43
Examples of an
ASCII Header
Block
The figure below shows two examples of an ASCII Header Block.
170 ADM 350 00 (Discrete 16-Point Input, 16-Point Output Module)
MODBUS PLUS 984 DIG 0002 0101
Data bits transferred
in 984 format
Digital
module
Input words: 1
Output words: 1
Module ID
170 AAO 120 00 (Analog 4-Channel Output Module)
MODBUS PLUS 984 ANA 01C3 0005
Data bits transferred
in 984 format
Analog
module
Input words: 0
Output words: 5
(includes 1
parameter word)
Module ID