Goodrive10 Series Mini VFD Communication protocol
-91-
hex) and one hex occupies one byte.
The command code is used to read the working stage of the VFD.
For example, read continuous 2 data content from0004H from the VFD with the address of
01H (read the content of data address of 0004H and 0005H), the frame structure is as
follows:
RTU master command (sent from the
master to the VFD)
RTU slave response (sent from the VFD to
the master)
T1-T2-T3-T4 between START and END is to provide at least the time of 3.5 bytes as the
leisure time and distinguish two messages for the avoidance of taking two messages as one
message.
ADDR = 01H means the command message is sent to the VFD with the address of 01H and
ADDR occupies one byte.
CMD=03H means the command message is sent to read data from the VFD and CMD
occupies one byte.
"Start address" means reading data from the address and it occupies 2 bytes with the fact
that the MSB is in the front and the LSB is in the behind.
"Data number" means the reading data number with the unit of word. If the "start address" is
0004H and the "data number" is 0002H, the data of 0004H and 0005H will be read.
CRC occupies 2 bytes with the fact that the LSB is in the front and the MSB is in the behind.
The meaning of the response is that:
To Next Page
Loading...
Need help?
General