FOTEK GD20-004G-2, Operation Manual

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Goodrive20 Series VFD Communication protocol
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ASCII master command (sent from the
master to the VFD)
ASCII slave response (sent from the VFD
to the master)
address
LSB of data writing
address
"0"
address
LSB of data writing
address
"0"
MSB of to-be-written
data
"0" MSB of to-be-written
data
"0"
"0" "0"
MSB of data writing
address
LSB of data writing
address
"1" MSB of data writing
address
LSB of data writing
address
"1"
"2" "2"
MSB of to-be-written
data
"A"
MSB of to-be-written
data
"A"
"B" "B"
LRC CHK Hi "3" LRC CHK Hi "3"
LRC CHK Lo "A" LRC CHK Lo "A"
END Hi CR END Hi CR
END Lo LF END Lo LF
7.3.2.4 Command code: 10H, continuous writing
Command code 10H means the master write data to the VFD, the number of data being
written is determined by the command "data number", the max. number of continuous writing
is 16 words.
For instance: Write 5000 (1388H) to 0004H of the VFD whose slave address is 02H, write 50
(0032H) to 0005H of the VFD whose slave address is 02H, then the structure of this frame is
listed as follows.
ASCII master command (sent from the
master to the VFD)
ASCII slave response (sent from the VFD
to the master)
START ":" START ":"
ADDR
"0"
ADDR
"0"
"2" "2"
CMD
"1"
CMD
"1"
"0" "0"
MSB of starting
address
"0" MSB of starting
address
"0"
"0" "0"
LSB of starting
address
"0"
LSB of starting
address
"0"
"4" "4"
MSB of data number
"0"
MSB of data number
"0"
"0" "0"
LSB of data number "0" LSB of data number "0"