FOTEK GD20-004G-2, Руководство по эксплуатации

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Goodrive20 Series VFD Communication protocol
-128-
The RTU response 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
LSB of CRC C5H
MSB of CRC 6EH
END T1-T2-T3-T4 (time gap with a min. length of 3.5 bytes)
7.3.2 ASCII mode
7.3.2.1 Command code: 03H (0000 0011), read N words (Word) (max. number for
continuous reading is 16 words)
For instance: As for the VFD whose slave address is 01H, the starting address of internal
storage is 0004, read two words continuously, 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"
"1" "1"
CMD
"0"
CMD
"0"
"3" "3"
MSB of starting
address
"0"
Byte number
"0"
"0" "4"
LSB of starting
address
"0"
MSB of data address
0004H
"1"
"4" "3"
MSB of data number
"0" LSB of data address
0004H
"8"
"0" "8"
LSB of data number
"0"
MSB of data address
0005H
"0"
"2" "0"
LRC CHK Hi "F" LSB of data address
0005H
"0"
LRC CHK Lo "6" "0"
END Hi CR LRC CHK Hi "5"
END Lo LF LRC CHK Lo "D"
END Hi CR
END Lo LF