Goodrive100 inverters
Communication protocol
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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 CHK low bit”, which are “digital address
0004H high bit”, “digital address 0004H low bit”, “digital address 0005H high bit” and “digital address 0005H
low bit”.
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 data address 0004H is 1388H,and the data of data address 0005H is
0000H.
CRC occupies 2 bytes with the fact that the high bit is in the front and the low bit is in the behind.
7.3.2 Command code:06H
06H(correspond to binary 0000 0110), write one word(Word)
The command means that the master write data to the inverter and one command can write one data other
than multiple dates. 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:
RTU master command message (from the master to the inverter)
START
T1-T2-T3-T4 (transmission time of 3.5 bytes)
ADDR
02H
CMD
06H
High bit of writing data address
00H
Low bit of writing data address
04H
