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3.
MODBUS Communication Control
3.1 Communication Procedures
This product returns the "response message" as a reply to the "request message" that will be sent by the upper computer.
Therefore, the transmission will never be initiated by this product.
Timing of Transmission
See "3.3.4.1
3.2
Kinds of Message
■ Kinds of message can be briefly classified into the following:
■ Data is in binary during MODBUS RTU mode.
■ In the case of the MODBUS ASCII mode, all codes will be expressed in ASCII code.
■ To code the program for the upper computer, see "6. List of Identifier (Codes)" and "7. List of ASCII Codes."
■ This product will not save the data unless the save request message is received.
To keep the data for the next power ON, send the save request message.
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Request Interval
See "3.3.4.2
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