BONFIGLIOLI Vectron Agile, Communications Manual

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Modbus Agile 59 02/2011
Modbus Message Examples
9.2.2.3 Function Code 100, Read 32-Bit Parameter
Example 1:
Reading parameter
Fixed Frequency 2
481 in data set 0 from the frequency inverter with address 1.
Request: Master

Frequency Inverter
Field: SoF Addr. Fct.Code DSet/Par-No. LRC EoF
ASC : 0 1 6 4 0 1 E 1 B 9 CR LF
Hex 3A 30 31 36 34 30 31 45 31 42 39 0D 0A
Response: Frequency Inverter

Master
Field: SoF Addr. Fct.Code Para-Value LRC EoF
ASC : 0 1 6 4 0 0 0 0 0 3 E 8 B 0 CR LF
Hex 3A 30 31 36 34 30 30 30 30 30 33 45 38 42 30 0D 0A
The hexadecimal value sent is 0x000003E8 = 1000. Parameter
Fixed Frequency 2
481 has 2 decimal
places.
Therefore, fixed frequency 2 = 10.00 Hz.
Example 2:
Reading unknown parameter 1600 (0x0640) in data set 2 from the frequency inverter with address 1.
Request: Master

Frequency Inverter
Field: SoF Addr. Fct.Code DSet/Par-No. LRC EoF
ASC : 0 1 6 4 2 6 4 0 3 5 CR LF
Hex 3A 30 31 36 34 32 36 34 30 33 35 0D 0A
Error Response: Frequency Inverter

Master
Field: SoF Addr. Fct.Code Except.
Code
LRC EoF
ASC : 0 1 E 4 0 2 1 9 CR LF
Hex 3A 30 31 45 34 30 34 31 37 0D 0A
The exception code sent is hexadecimal value 0x04 = SLAVE DEVICE FAILURE.
9.2.2.4 Function Code 101, Write 32-Bit Parameter
Example 1:
Writing parameter
Rated Frequency
375 (0x0177) in data set 2 to frequency inverter with address 1.
The rated frequency is to be set to 10.00 Hz. Parameter
Rated Frequency
375 has two decimal plac-
es.
Therefore the value to be sent is 1000 = 0x03E8.
Request: Master

Frequency Inverter
Field: SoF Addr. Fct.Cod DSet/Par-No. Para-Value LRC EoF
ASC : 0 1 6 5 2 1 7 7 0 0 0 0 0 3 E 8 1 7 CR LF
Hex 3A 30 31 36 35 32 31 37 37 30 30 30 30 30 33 45 38 31 37 0D 0A
Response: Frequency Inverter

Master
Field: SoF Addr. Fct.Cod DSet/Par-No. Para-Value LRC EoF
ASC : 0 1 6 5 2 1 7 7 0 0 0 0 0 3 E 8 1 7 CR LF
Hex 3A 30 31 36 35 32 31 37 37 30 30 30 30 30 33 45 38 31 37 0D 0A
The response is an echo of the request message.
Example 2:
Writing out of range value to 9.00 Hz to parameter
Rated Frequency
375 (0x0177) in data set 2 of
the frequency inverter with address 1.
Parameter
Rated Frequency
375 has 2 decimal places. The value to be sent is 900 = 0x0384
Request: Master

Frequency Inverter
Field: SoF Addr. Fct.Cod DSet/Par-No. Para-Value LRC EoF
ASC : 0 1 6 5 2 1 7 7 0 0 0 0 0 3 8 4 7 B CR LF
Hex 3A 30 31 36 35 32 31 37 37 30 30 30 30 30 33 38 34 37 42 0D 0A
Error Response: Frequency Inverter

Master
Field: SoF Addr. Fct.Code
Except.
Code
LRC EoF
ASC : 0 1 E 5 0 4 1 6 CR LF
Hex 3A 30 31 45 35 30 34 31 36 0D 0A
The exception code sent is hexadecimal value 0x04 = SLAVE DEVICE FAILURE.