Kindly read this operation manual for proper usage.
Table of Contents
About the Operation Manual
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- 1 -
Requirements for
Communication···········································································································································
- 1 -
Things Communication Function Can Do
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- 1 -
Position (Priority) of Communication
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- 1 -
Settings to Be Made Prior to the Communication
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- 1 -
Section Communication
Settings··································································································································································
- 2 -
Outline························································································································································································
- 2 -
Master / slave settings
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- 3 -
Setting of Communication Protocol
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- 3 -
Setting of Format
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- 3 -
Setting of Device Address
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- 3 -
Setting of Communication Speed, Data Length, Stop Bit, and Parity
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- 3 -
Setting of BCC
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- 3 -
Setting of Response Delay Time
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- 3 -
Time-out Time Setting
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- 3 -
Setting the number of retries
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- 4 -
Acquisition Cycle Setting
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- 4 -
Input settings Input
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- 4 -
Slave device address
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- 4 -
Command selection
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- 4 -
Setting the number of registers
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- 4 -
Endian settings
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- 4 -
Register address
setting···············································································································································
- 4 -
Section Communication Outline
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- 5 -
Slave Function
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- 5 -
Master function (Only RS-485 communication is supported)
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- 5 -
Kinds of Message
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- 6 -
Slave Function
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- 6 -
Master function (Only RS-485 communication is supported)
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- 6 -
Section Explanation about TOHO Protocol Communication
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- 7 -
About the Format
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- 7 -
Structure of Request Message (Data Transmission from Upper Computer
to This Product) ··············································· -
7 -
Structure of Read Request Message
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- 7 -
Structure of Write Request Message
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- 7 -
Structure of Save Request Message
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- 7 -
Structure of Response Message (Data Transmission from This Product
to Upper Computer) ············································ - 8
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Response Message for Read Request Message
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- 8 -
Response Message for Write/Save Request Message
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- 8 -
Response Message for the Error
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- 8 -
Explanation about Codes
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- 9 -
DWG.No. 4B-6829-E
Things to Be Noted during the Communication
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- 12 -
Timing of Transmission
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- 12 -
Request Interval
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- 12 -
Conditions for Response
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- 12 -
Address Specification Error
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- 12 -
Number of Digits of Data and Position of Decimal Point
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- 12 -
Operation after Receiving a Save Request Message
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- 12 -
Saving Data Other than Save Request Message
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- 12 -
Sample TOHO Communications
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- 13 -
Sample Communication for Reading
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- 13 -
Sample Communication for Writing
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- 14 -
Section TOHO protocol communication explanation (Master function)
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- 15 -
Configuration of request message (sending from this unit to an
external device)
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-
Read request message configuration
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- 15 -
Configuration of response message (sending from external device to
this
unit)································································
- 15 -
Response message to read request message
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- 15 -
Response message when there is an error
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- 15 -
Explanation about Codes
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- 16 -
Precautions for communication
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- 17 -
Transmission / reception timing
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- 17 -
Number of digits in data and position of decimal point
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- 17 -
TOHO communication example
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- 18 -
Communication example to read
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- 18 -
Section Explanation about MODBUS Protocol Communication
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- 19 -
MODBUS RTU
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- 19 -
Structure of Request Message (Data Transmission from Upper Computer
to This Product) ······························ - 19 -
Structure of Response Message (Data Transmission from This Product
to Upper Computer) ···························· - 20 -
Explanation about Codes
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- 21 -
Things to Be Noted during the Communication
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- 23 -
MODBUS ASCII
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- 24 -
Structure of Request Message (Data Transmission from Upper Computer
to This Product) ······························ - 24 -
Structure of Response Message (Data Transmission from This product
to Upper Computer) ···························· - 25 -
Explanation About Codes
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- 26 -
Things to Be Noted during the Communication
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- 28 -
Section Explanation about MODBUS Protocol Communication
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- 29 -
MODBUS RTU
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- 29 -
Read request message (sending from this unit to an external device)
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- 29 -
Response Message to read Request Message (sending from external
device to this unit) ································· - 29 -
Response message when there is an error
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- 29 -
Code description
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- 30 -
Precautions for communication
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- 31 -
MODBUS ASCII
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- 32 -
Read request message (sending from this unit to an external device)
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- 32 -
Response message to read request message (sending from external
device to this unit) ··································· - 32
-
Response message when there is an error
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- 32 -
Code description
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- 33 -
Precautions for communication
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- 34 -
Section List of Identifiers
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- 35 -
Other Commands
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