FOTEK GD20-004G-2, Руководство по эксплуатации

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Goodrive20 Series VFD Communication protocol
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RTU master command RTU slave command
START T1-T2-T3-T4 START T1-T2-T3-T4
ADDR 01H ADDR 01H
CMD 08H CMD 08H
MSB of
sub-function code
00H
MSB of
sub-function code
00H
LSB of sub-function
code
00H
LSB of
sub-function code
00H
MSB of data 12H MSB of data 12H
LSB of data ABH LSB of data ABH
LSB of CRC CHK ADH LSB of CRC CHK ADH
MSB of CRC CHK 14H
MSB of CRC
CHK
14H
END T1-T2-T3-T4 END T1-T2-T3-T4
7.3.1.4 Command code 10H, continuous writing
Command code 10H means that if the master writes data to the VFD, the data number
depends on the "data number" in the command code. The max continuous reading number is
16.
For example, write 5000 (1388H) to 0004H of the VFD whose slave address is 02H and 50
(0032H) to 0005H, the frame structure is as follows.
The RTU request command is:
START T1-T2-T3-T4 (time gap with a min. length of 3.5 bytes)
ADDR 02H
CMD 10H
MSB of data writing
address
00H
LSB of data writing address
04H
MSB of data quantity
00H
LSB of data quantity
02H
Byte number 04H
MSB of data in 0004H 13H
LSB of data in 0004H 88H
MSB of data in 0005H 00H
LSB of data in 0005H 32H
LSB of CRC C5H
MSB of CRC 6EH
END T1-T2-T3-T4 (time gap with a min. length of 3.5 bytes)