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8 Communications Functions
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
8-3 Explanation of Each Function Code
8
Checks the communications between the master and the slave. Any value can be used for test data.
Example
To perform a loop-back test on the inverter with slave address 1.
Query
Response
*1 Broadcasting cannot be performed.
The test sub code supports the Echo Query Data command (00 hex, 00 hex) only. Other commands are
not supported.
Loop-back Test [08 hex]
No. Field name Example [hex]
1
Slave address
*1
01
2 Function code 08
3 Test sub code (MSB) 00
4 Test sub code (LSB) 00
5 Data (MSB) Any
6 Data (LSB) Any
7 CRC-16 (MSB) CRC
8 CRC-16 (LSB) CRC
No. Field name Example [hex]
1
Slave address
*1
01
2 Function code 08
3 Test sub code (MSB) 00
4 Test sub code (LSB) 00
5 Data (MSB) Any
6 Data (LSB) Any
7 CRC-16 (MSB) CRC
8 CRC-16 (LSB) CRC
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