Goodrive300-19 series open loop vector inverter special for hosit Communication protocol
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and the “data number” is 0002H, the data of 0004H and 0005H will be read.
CRC occupies 2 bytes with the fact that the low bit is in the front and the high bit is in the behind.
RTU slave response message (from the inverter to the master)
T1-T2-T3-T4 (transmission time of 3.5 bytes)
Data high bit of address 0004H
Data low bit of address 0004H
Data high bit of address 0005H
Data low bit of address 0005H
T1-T2-T3-T4 (transmission time of 3.5 bytes)
The meaning of the response is that:
ADDR=01H means the command message is sent to the inverter with the address of 01H and ADDR
occupies one byte;
CMD=03H means the message is received from the inverter to the master for the response of reading
command and CMD occupies one byte;
“Byte number” means all byte number from the byte (excluding the byte) to CRC byte (excluding the
byte). 04 means there are 4 byte of data from the “byte number” to “CRC low bit”, which are “digital
address 0004H high bit”, “data low bit of address 0004H”, “data high bit of address 0005H” and “data
low bit of address 0005H”.
There are 2 bytes stored in one data with the fact that the high bit is in the front and the low bit is in the
behind of the message, the data of address 0004H is 1388H,and the data of address 0005H is
0000H.
CRC occupies 2 bytes with the fact that the low bit is in the front and the high bit is in the behind.
10.4.2 Command code: 06H, write one word
The command means that the master write data to the inverter and one command can write one data
other than multiple data. The effect is to change the working mode of the inverter.
For example, write 5000 (1388H) to 0004H from the inverter with the address of 02H, the frame
structure is as below:
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