TOHO ELECTRONICS TRM-006A User Manual
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6.
MODBUS communications control................................................................................... 20
6.1
Communications procedure
6.2
Message types
6.3
Composition of an RTU request message (transmitted from a high-level
computer to this product)
6.4
Composition of an RTU response message (transmitted from this product
to a high-level computer)
6.5
Description of RTU codes
6.6
Precautions on RTU communications
6.7
Example of CRC-16 calculations
6.8
Composition of an ASCII request message (transmitted from a high-level
computer to this product)
6.9
Composition of ASCII response messages (transmitted from this product
to a high-level computer)
6.10
Description of ASCII codes
6.11
Precautions on ASCII communications
6.12
Example of LRC calculations
7.
Specifications..................................................................................................................... 34
7.1
Communications standard category
7.2
Communications specifications
8.
Connections ....................................................................................................................... 35
9.
Table of identifiers (codes) ................................................................................................ 36
10.
Table of ASCII codes ......................................................................................................... 39