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Chapter 7 Detailed Explanations of Functional Parameters
LRC CHK Hi
LRC Check:
LRC CHK Lo
8-bit LRC Check consists of 2 ASCII codes
END Hi
End character:
END Lo
END Hi = CR (0DH), END Lo = LF (0AH)
RTU mode:
START
Keep that zero-input signal is more than or equal to 10
ms
Address
Communication address: 8-bit binary address
Function
Function code: 8-bit binary address
DATA (n-1)
Data characters:
n × 8-bit data, n = 16
……
DATA 0
CRC CHK Low
CRC Check:
CRC CHK High
16-bit CRC Check consists of 2 8-bit binary systems
END
Keep that zero-input signal is more than or equal to 10
ms
Communication Address
00H: All driver Broadcasts
01H: For inverter with 01st address
0FH: For inverter with 15th address
10H: For inverter with 16th address, by analogy, the maximum could
reach 240.
Function code and Data Characters
03H: Read out the content of temporary storage
06H: Write a WORD into temporary storage; Function code 03H:
Read out the content of temporary storage.
For example: Driver address 01H, reads out the data characters in 2
successive temporary storages as follows: Initial temporary storage
address 2102H
Function code 06H: Write a WORD into temporary storage.