TOHO ELECTRONICS TTM000 - Manual (Page 3)

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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 ..................................................................................................................... 35
7.1 Communications standard category
7.2 Communications specifications
8. Connections........................................................................................................................ 36
9. Table of identifiers (codes) ................................................................................................ 38
10. Table of ASCII codes ......................................................................................................... 41