GN-9371_2_3 User Manual
Page 84 of (110)
G-series GN-9371_2_3 PIO Rev. 1.02.docx
A.3.3 (0x03) Read Holding Registers
This function code is used to read the contents of a contiguous block of holding registers in a remote device.
The Request PDU specifies the starting register address and the number of registers.
The register data in the response message are packed as two bytes per register, with the binary contents
right justified within each byte. For each register, the first byte contains the high order bits and the second
contains the low order bits.
• Request
• Response
- In case of address 0x0800, 0x0801 output register value: 0x1122, 0x3344.
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