Message Format Instruction - RiedConn RC-72 Bedienungsanleitung

compares it with the value in the received CRC field. If the two values are not equal, it occurs.
error.

6.3 Message format instruction

Read the data register value (function code is 0x03/0x04)
Request
Frame Address
structure code
Occupied
1 byte
bytes
Data Range 1～247
Example of
0x01
message
Response
Frame Address
structure code
Occupied
1 byte
bytes
Example of
0x01
message
Note:
The host request starting register address is the first data address of querying the primary grid or
secondary grid; the number of registers is as the length of the query data. As shown in above
example, the starting register address "0x00 0x06" indicates the three-phase phase voltage float
data address and the number of register "0x00 0x06" indicates the data length 6 (3 float type
data occupying six registers).
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Function code
Starting register
address
1 byte 2 bytes
0x03/0x04 0x0000～0xFFFF
0x03 0x00 0x06
Function code
Number of register
1 byte
0x03 0x0C
Data code
Number of registers
Maximum 125
0x00 0x06
Data code
Register value
bytes
1 byte 12 bytes
12 bytes data
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Check code
2 bytes 2 bytes
CRC16
0x25C9
Check code
2 bytes
CRC16
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