Loopback Test [08h]:
This function checks a master-slave transmission using any test data. An example
follows:
x
Send test data to an inverter having slave address “1” and receiving the test data
from the inverter (as a loopback test).
Query:
Response:
No.
Field Name
Example
(Hex)
No.
Field Name
Example
(Hex)
1
Slave address *1
01
1
Slave address *1
01
2
Function code
08
2
Function code
08
3
Test subcode
(high order)
00
3
Test subcode
(high order)
00
4
Test subcode
(low order)
00
4
Test subcode
(low order)
00
5
Data (high order)
Any
5
Data (high order)
Any
6
Data (low order)
Any
6
Data (low order)
Any
7
CRC-16 (high order)
CRC
7
CRC-16 (high order)
CRC
8
CRC-16 (low order)
CRC
8
CRC-16 (low order)
CRC
Note 1:
Broadcasting is disabled.
When test subcode is for echo (00h, 00h) only and not available to the other commands.
B
14
Appe
ndix B
B
−
14
Appendix B
