SMC Networks HRSH Series, Руководство по эксплуатации

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HRX-OM-Q033
Chapter 4 MODBUS communication function
4.5 Message configuration HRSH Series
4-8
4.5 Message configuration
4.5.1 Message format
The message configuration is shown below. This product communicates in
ASCII mode. ASCII mode is used from Start to End.
1) 2) 3) 4) 5) 6)
Start Slave Address Function Data LRC End
[:] XX XX XX XX XX ～ XX XX XX [CR] [LF]
1) Start
The start of the message. [:](3Ah)
2) Slave Address
（
1 to 99 3031h to 3939h
）
This is a number to identify this product.
“1" is the default setting. This can
be changed by the operation display panel.
3) Function (Refer to
‘’4.6 Function codes’’.)
Command is assigned.
4) Data
Depending on the function, the address and the number of the register, the
value of reading/writing are assigned.
5) LRC
LRC method
Refer to
‘’4.7 LRC’’.
6) END
The end of the message. [CR](0Dh)
＋
[LF](0Ah)
A response message will not be returned unless the request includes [:] and
[CR][LF]. This product clears all previously received code when [:] is
received.