ACD320 user manual Appendix
- 141-
The AC motor drive is expected to return a normal response after receiving command
messages from the master device. In the exception response, the most significant bit of the
original command code is set to "06" no matter the command code is "03"or"06", and the
data address is fixed to be 0x8001.
For example:
RTU Fault Response Message of the Slave
START T1-T2-T3-T4 (transmission time of 3.5 bytes)
ADDR 01H
CMD 06H
higher bits of the fault
response
50H
lower bits of the fault
response
01H
higher bits of the fault code 00H
lower bits of the fault code 05H
CRC CHK lower bits 09H
CRC CHK higher bits 09H
END T1-T2-T3-T4 (transmission time of 3.5 bytes)
ASCII Fault Response Message of the Slave
START ‘:’
ADDR
‘0’
‘1’
CMD
‘0’
‘6’
higher bits of the fault
response
‘5’
‘0’
lower bits of the fault
response
‘0’
‘1’
higher bits of the fault code
‘0’
‘0’
lower bits of the fault code
‘0’
‘5’
LRC CHK Hi ‘A’
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