Inovance MD500T75G - Page 206

7. Description of Parameters MD500 User Manual
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Here takes the CANlink protocol as an example to describe the communication process of the host computer to write running
command to the AC drive.
Before writing the running command, set the baud rate and local address. The settings of related parameters are as follows:
Function Parameter Setting Description
Fd-00 (Baud rate) Select the CANlink baud rate in the thousand's digit of Fd-00.
You must set the same baud rate in the master and slave.
Otherwise, the communication will not be implemented.
Fd-02 (Local address) The CANlink address range is 1 to 63.
Suppose that the CANlink master address is 0x01 and the AC drive address is 0x02 (settable, range: 1 to 63). The running
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The format of the message sent by the master is as follows:
Message ID (Hex) Data Length Data (Hex)
0x11050201 4 00 04 20 00
The format of the response message returned by the slave is as follows:
Message ID (Hex) Data Length Data (Hex)
0x10050102 4 00 04 20 00
The sending message and the response message are described as follows:
Sending Message Response Message
Message ID
11050201H
Arbitration sign 1000 (binary) Message ID
11050102H
Arbitration sign 1000 (binary)
Q&A sign 1 (binary) Q&A sign 1 (binary)
Command code 05H Command code 05H
Target address 02H Target address 01H
Source address 01H Source address 02H
Data length 4 (decimal) Data length 4 (decimal)
Write data high byte 00H Write data high byte 00H
Write data low byte 04H Write data low byte 04H
Write address high byte 20H Write address high byte 20H
Write address low byte 00H Write address low byte 00H
Note
To write other running commands via the CANlink protocol, refer to the sending message format
and response message format in the following tables to organize the message.
The sending CANlink frame of the write operation is as follows:
CAN CANlink Description
IDbit28–25 Arbitration sign The arbitration sign of the command frame is 1000.
IDbit24 Q&A sign Q&A sign: 1 is the question frame.
IDbit23–16 Command code Write register command is 0x05.
IDbit15–8 Target address CANlink target address
IDbit7–0 Source address CANlink local address
DATA1 Data Write data high byte
DATA2 Data Write data low byte
DATA3 Data Write address high byte
DATA4 Data Write address low byte
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