Goodrive10 inverters Communication protocol
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Figure 2 Chrysanthemum connection applications
Figure 5 is the star connection. Terminal resistor should be connected to the two devices which have the
longest distance. (1# and 15#device)
Figure 3 star connection
It is recommended to use shield cables in multiple connection. The basic parameter of the devices, such as
baud rate and digital check bit in RS485 should be the same and there should be no repeated addr ess.
7.3 RTU mode
7.3.1 RTU communication frame format
If the controller is set to communicate by RTU mode in Modbus network every 8bit byte in the message
includes two 4Bit hex characters. Compared with ACSII mode, this mode can send more data at the sa me
baud rate.
Code system
· 1 start bit
· 7 or 8 digital bit, the minimum valid bit can be sent firstly. Every 8 bit frame includes two hex characters
(0...9, A...F)
· 1 even/odd check bit . If there is no checkout, the even/odd check bit is inexistent.
· 1 end bit (with checkout), 2 Bit(no checkout)
Error detection field
· CRC
The data format is illustrated as below:
11-bit character frame (BIT1~BIT8 are the digital bits)
Start bit
BIT1
BIT2
BIT3
BIT4
BIT5
BIT6
BIT7
BIT8
Check
bit
End bit
10-bit character frame (BIT1~BIT7 are the digital bits)
