BONFIGLIOLI Vectron Agile, Communications Manual

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Modbus Agile 02/2011 60
Modbus Message Examples
9.2.3 Function Code 8, Diagnostics
Example 1a:
Clearing all Diagnostic Counters (Sub-function 0x0A) in the frequency inverter with address 1.
Request: Master

Frequency Inverter
Field: SoF Addr. Fct.Code Sub-function Data LRC EoF
ASC : 0 1 0 8 0 0 0 A 0 0 0 0 E D CR LF
Hex 3A 30 31 30 38 30 30 30 41 30 30 30 30 45 44 0D 0A
Response: Frequency Inverter

Master
Field: SoF Addr. Fct.Code DSet/ Para-No. No. of Regs LRC EoF
ASC : 0 1 0 8 0 0 0 A 0 0 0 0 E D CR LF
Hex 3A 30 31 30 38 30 30 30 41 30 30 30 30 45 44 0D 0A
The response is an echo of the request. All counters are now set to zero.
Example 1b:
With all counters set to zero, read Diagnostic Counter 4, "Slave Message Count" (Sub-function 0x0E)
from the frequency inverter with address 1.
Field: SoF Addr. Fct.Code Sub-function Data LRC EoF
ASC : 0 1 0 8 0 0 0 E 0 0 0 0 E 9 CR LF
Hex 3A 30 31 30 38 30 30 30 45 30 30 30 30 45 39 0D 0A
Response: Frequency Inverter

Master
Field: SoF Addr. Fct.Code Sub-function Data LRC EoF
ASC : 0 1 0 8 0 0 0 E 0 0 0 1 E 8 CR LF
Hex 3A 30 31 30 38 30 30 30 45 30 30 30 31 45 38 0D 0A
Example 2:
Read unknown Diagnostic Counter 8 (Sub-function 0x13) from frequency inverter with address 1.
Response: Master

Frequency Inverter
Field: SoF Addr. Fct.Code Sub-function Data LRC EoF
ASC : 0 1 0 8 0 0 1 3 0 0 0 0 E 4 CR LF
Hex 3A 30 31 30 38 30 30 31 33 30 30 30 30 45 34 0D 0A
Error Response: Frequency Inverter

Master
Field: SoF Addr. Fct.Code Except.
Code
LRC EoF
ASC : 0 1 8 8 0 1 7 6 CR LF
Hex 3A 30 31 38 38 30 31 37 36 0D 0A
The exception code sent is hexadecimal value 0x01 = ILLEGAL FUNCTION.