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
Field:
ASC
Hex
Response: Frequency Inverter
Field:
ASC
Hex
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:
ASC
Hex
Response: Frequency Inverter
Field:
ASC
Hex
Example 2:
Read unknown Diagnostic Counter 8 (Sub function 0x13) from frequency inverter
with address 1
Request: Master
Field:
ASC
Hex
Error Response: Frequency Inverter
Field:
ASC
Hex
The exception code sent is hexadecimal value 0x01 = ILLEGAL FUNCTION.
05/08
05/08
Frequency Inverter
Adr
Fct.Code
SoF
:
0
1
0
8
3A
30
31
30
38
Adr
Fct.Code
SoF
:
0
1
0
8
3A
30
31
30
38
Adr
Fct.Code
SoF
:
0
1
0
8
3A
30
31
30
38
Adr
Fct.Code
SoF
:
0
1
0
8
3A
30
31
30
38
Frequency Inverter
Adr
Fct.Code
SoF
:
0
1
0
8
3A
30
31
30
38
Adr
Fct.Code
SoF
:
0
1
8
8
3A
30
31
38
38
Modbus Instruction manual
Modbus Instruction manual
Subfunction
0
0
0
A
0
30
30
30
41
30
30
Master
DSet/ Para-No.
No. of Regs
0
0
0
A
0
30
30
30
41
30
30
Subfunction
0
0
0
E
0
30
30
30
45
30
30
Master
Subfunction
0
0
0
E
0
30
30
30
45
30
30
Subfunction
0
0
1
3
0
30
30
31
33
30
30
Master
Excep.
LRC
EoF
Code
0
1
7
6
CR
30
31
37
36
0D
Data
LRC
0
0
0
E
D
CR
30
30
45
44
0D
LRC
0
0
0
E
D
CR
30
30
45
44
0D
Data
LRC
0
0
0
E
9
CR
30
30
45
39
0D
Data
LRC
0
0
1
E
8
CR
30
31
45
38
0D
Data
LRC
0
0
0
E
4
CR
30
30
45
34
0D
LF
0A
EoF
LF
0A
EoF
LF
0A
EoF
LF
0A
EoF
LF
0A
EoF
LF
0A
47
47
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