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According to the measurement object, the meter is connected to different electrodes.
Please refer to the "Digital Universal Controller Electrode Setting Instructions" for the
corresponding parameter table of the communication address.
3.
Corresponding parameter table of communication address:
For example:
Send frame:
[01 04 00 00 00 02 71 CB], the meaning is as follows:
[01]: Instrument address
[04]: Function code
[00 00]: The starting register address is 0x0000
[00 02]: Read 2 registers starting from the starting address (that is, read 1
single-precision floating-point data result)
[71 CB]: CRC check data
Return frame:
[01 04 04 CC CD 41 48 65 4D], the meaning is as follows:
[01]: Instrument address
[04]: Function code
[04]: Number of bytes returned (here 4)
[CC CD 41 48]: 0x4148CCCD (that is, the floating-point value is 12.55, and the specific
value means to find the corresponding address) (Note: Combine two 16-bit integer
registers to form a single-precision floating-point number, pay attention to the order of
the data)
[65 4D]: CRC check data
