Vicruns VD520 Series, Руководство пользователя

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Communication Protocol VD520 Series Inverter User Manual
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Output frequency low Bit xx H
CRC CHK low Bit xx H
CRC CHK high Bit xx H
END T1-T2-T3-T4
9.6.2 Command Code: 06H (0000 0110), write one word
Such as: Put 5000(1388H) (namely write-in setting frequency 50.00Hz) write to slave address 01H
inverter 3001H (communication set frequency address). The frame structure description as below:
RTU Master command information.
START T1-T2-T3-T4
ADDR 01H
CMD 06H
Write data address high Bit 30H
Write data address low Bit 01H
Data content high Bit 13H
Data content low Bit 88H
CRC CHK low Bit DAH
CRC CHK high Bit 5CH
END T1-T2-T3-T4
RTU slave response information.
START T1-T2-T3-T4
ADDR 01H
CMD 06H
Write data address high Bit 30H
Write data address low Bit 01H
Data content high Bit 13H
Data content low Bit 88H
CRC CHK low Bit DAH
CRC CHK high Bit 5CH
END T1-T2-T3-T4
9.6.3 Communication Format Error Check Method
Frame error check mode includes two part verification, Bit check of byte (odd/even verify) and CRC
check of complete data of format.
9.6.3.1 Byte check
User can select different check mode according to requirement, can also select no-check, but it will
affect the Bit setting of every byte check.
Even parity check: add a Bit of even parity check before data transmission, to express the number of
“1” in the transmission data is odd or even, if the number is even, check Bit is “0”, otherwise it “1”. This