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INVT Goodrive350-19 Series Operation Manual page 400

Vfd for crane
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Goodrive350-19 Series VFD for Crane
The definition of the response information is described as follows:
"ADDR" is "01H", indicating that the command is sent from the VFD whose address is 01H. "ADDR"
occupies one byte.
"CMD" is "03H", indicating that the message is a VFD response to the 03H command from the master
for reading data. "CMD" occupies one byte.
"Number of bytes" indicates the number of bytes between a byte (not included) and the CRC byte (not
included). The value "04" indicates that there are four bytes of data between "Number of bytes" and
"CRC LSB", that is, "MSB of data in 0004H", "LSB of data in 0004H", "MSB of data in 0005H", and
"LSB of data in 0005H".
A piece of data contains two bytes, with the MSB on the left and LSB on the right. From the response,
the data in 0004H is 1388H, and that in 0005H is 0000H.
CRC check occupies two bytes, with the LSB on the left, and MSB on the right.
10.4.2 Command code 06H, writing a word
This command is used by the master to write data to the VFD. One command can be used to write
only one piece of data. It is used to modify the parameters and running mode of the VFD.
For example, if the master writes 5000 (1388H) to 0004H of the VFD whose address is 02H, the
frame structure is as follows.
RTU master command (from the master to the VFD) is as follows:
MSB of data writing address
LSB of data writing address
MSB of data content
LSB of data content
RTU slave response (from the VFD to the master) is as follows:
MSB of data writing address
CRC MSB
END
START
ADDR
CMD
CRC LSB
CRC MSB
END
START
ADDR
CMD
T1-T2-T3-T4 (transmission time of 3.5 bytes)
T1-T2-T3-T4 (transmission time of 3.5 bytes)
T1-T2-T3-T4 (transmission time of 3.5 bytes)
T1-T2-T3-T4 (transmission time of 3.5 bytes)
-388-
Communication protocol
9DH
02H
06H
00H
04H
13H
88H
C5H
6EH
02H
06H
00H

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