BONFIGLIOLI Active Cube User Manual

9 Example messages Modbus/TCP
This chapter describes some examples of telegrams for Modbus/TCP.
9.1 16-bit access
9.1.1 Function code 3, read 16-bit parameter
Example 1:
Reading of parameter
Rated speed 372 (0x0174) in data set 2 from the frequency inverter with ad-
dress 1.
Request: Master  frequency inverter
Field:
MBAP
Unit
ID
Func.
DSet/ParNo.
Number of
registers
Transaction ID
Protocol ID
Length
Hex
nn
nn
nn
nn
00
06
01
03
21
74
00
01
Response: Frequency inverter  Master
Field:
MBAP
Unit
ID
Func.
No.
Bytes
Par.value
Transaction ID
Protocol ID
Length
Hex
nn
nn
nn
nn
nn
nn
01
03
02
05
6E
The sent hexadecimal value is 0x056E = Decimal 1390. Parameter
Rated speed 372 has no decimal
places. Thus, the rated speed is 1390 min
-1
.
Example 2:
Reading of parameters
Rated speed 372 (0x0174) in dataset 0 of frequency inverter with address set
to 1 and number of registers set to 2 (non-permissible value).
Request: Master  frequency inverter
Field:
MBAP
Unit
ID
Func.
DSet/ParNo.
Number of
registers
Transaction ID
Protocol ID
Length
Hex
nn
nn
nn
nn
00
06
01
03
01
74
00
02
Error response: Frequency inverter  Master
Field:
MBAP
Unit
ID
Func.
Excep.
Transaction ID
Protocol ID
Length
Hex
nn
nn
nn
nn
00
03
01
83
04
The sent exception condition code is the hexadecimal value 0x04 = ERROR SLAVE DEVICE.
44
ACU Modbus/TCP 10/13

BONFIGLIOLI Active Cube Specifications

General

Brand	BONFIGLIOLI
Model	Active Cube
Category	Inverter
Language	English