Loopback Test [08H] - Omron MX2 User Manual

Network Protocol Reference
Note 1
272

Loopback Test [08h]:

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