BONFIGLIOLI Vectron ACTIVE - Function Code 8, Diagnostics

Modbus Instruction manual 4705/08
05/08
Modbus Instruction manual 47
8.2.5 Function Code 8, Diagnostics
Example 1a:
Clearing all Diagnostic Counters (Sub function 0x0A) in the frequency inverter with
address 1
Request: Master Î Frequency Inverter
Field:
SoF
Adr Fct.Code Subfunction 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 Î Master
Field:
SoF
Adr 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
Adr Fct.Code Subfunction 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 Î Master
Field:
SoF
Adr Fct.Code Subfunction 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
Request: Master Î Frequency Inverter
Field:
SoF
Adr Fct.Code Subfunction 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 Î Master
Field:
SoF
Adr Fct.Code
Excep.
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.