TOHO ELECTRONICS TTX-700 - Manual (Page 2)

Contents
1.
Before using the product ......................................................................................................................... 4
1.1
On this operation manual ............................................................................................................. 4
1.2 What can be done with communications ...................................................................................... 4
1.3 Positioning communications (priority ranking)............................................................................ 4
1.4 Setting before communications .................................................................................................... 4
2. Settings regarding TOHO communications ............................................................................................ 5
2.1
Overview ...................................................................................................................................... 5
2.2 Setting a data length ..................................................................................................................... 6
2.3 Setting a stop bit length................................................................................................................ 6
2.4 Setting a parity ............................................................................................................................. 6
2.5 Setting whether to conduct a BCC check ..................................................................................... 6
2.6 Setting a communications speed .................................................................................................. 6
2.7 Setting an address......................................................................................................................... 7
2.8 Setting a response delay ............................................................................................................... 7
2.9 Switching communications mode ................................................................................................ 7
3. TOHO communications control .............................................................................................................. 8
3.1
Communications procedure.......................................................................................................... 8
3.2 Message types .............................................................................................................................. 8
3.3 Composition of a request message
(transmitted from a high-level computer to this product)............................................................. 9
3.4 Composition of a response message
(transmitted from this product to a high-level computer)........................................................... 10
3.5 Description of codes....................................................................................................................11
3.6 Communications precautions ..................................................................................................... 13
4. Examples of TOHO communications ................................................................................................... 15
4.1
Examples of communications to be read.................................................................................... 15
4.2 Examples of communications to be written ............................................................................... 15
5. Settings regarding MODBUS communications .................................................................................... 17
5.1
Overview .................................................................................................................................... 17
5.2 Setting a data length ................................................................................................................... 18
5.3 Setting a stop bit length.............................................................................................................. 18
5.4 Setting a parity ........................................................................................................................... 18
5.5 Setting a communications speed ................................................................................................ 18
5.6 Setting an address....................................................................................................................... 19
5.7 Setting a response delay ............................................................................................................. 19
5.8 Switching communications mode .............................................................................................. 19
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