Chapter 6 Communication
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5.6 Information inquiry
Information inquiry: inquire the current hard software version, high traceability.
Chapter 6 Communication
The instrument is provided with standard RS485 series communication interface, in
accordance with international universal standard MODBUS-RTU communication
protocol, supporting No.03 register reading and holding command.
MODBUS standard format (No.03 register reading and holding command)
Command format:
Definition
Address
Function
code
Register
address
Number
of data
CRC check
Data
ADDR
0x03
M
N
CRC 16
Number of bytes 1
1
2
2
2
Return format:
Definition
Address Function
code
Data size
Data
CRC check
Data
ADDR
0x 03
2*N
Data
CRC 16
Number of bytes 1
1
1
2*N
2
