Bit Access - BONFIGLIOLI Vectron Agile Communications Manual

9.2.2

32 Bit access

9.2.2.1 Function Code 3, Read 32-Bit Parameter
Example 1:
Reading parameter
address 1.
Request: Master  Frequency Inverter
Feld: SoF Addr. Fct.Code DSet/Par-No. No. Registers
ASC : 0 1 0
Hex 3A 30 31 30 33 31 31 45 31 30 30 30 32 30
Response: Frequency Inverter  Master
Feld: SoF Addr. Fct.Code No. Byte
ASC : 0 1 0
Hex 3A 30 31 31 30 30
The hexadecimal value sent is 0x03E8 = 1000. Parameter
places.
Therefore, the frequency is 10.00 Hz.
Example 2:
Reading parameter
address 1 and No. of Regs field set to 1 (invalid value).
Request: Master  Frequency Inverter
Feld: SoF Addr. Fct.Code DSet/Par-No. No. Registers LRC EoF
ASC : 0 1 0
Hex 3A 30 31 30 33 30 31 45 30 30 30 30 31 31 41 0D 0A
Error Response: Frequency Inverter  Master
SoF Addr.
Field:
ASC : 0
Hex 3A 30 31
The exception code sent is hexadecimal value 0x04 = SLAVE DEVICE FAILURE.
56
Fixed Frequency 2
481 (0x01E1) in data set 1 from the frequency inverter with
3 1 1 E 1 0 0
Para-Value
3 0 4 0 0 0 0 0 3 E 8 0 3 CR LF
34 30 30 30 30 30 33 45 38 30 33 0D 0A
Fixed Frequency 2
481 (0x01E1) in data set 0 from the frequency inverter with
3 0 1 E 0 0 0
Except.
Fct.Code
Code
1 8 3 0 4
38 33 30 34 37 38 0D 0A
LRC EoF
0 2 0 8 CR LF
38 0D 0A
LRC EoF
Fixed Frequency
0 1 1 A CR LF
LRC EoF
7 8 CR LF
Modbus Agile
Modbus Message Examples
481 has two decimal
02/2011