Converter Modbus Registers Table In - Readout By Function 03 (4X - References) Holding Registers; Frame Structure Of Modbus-Rtu Protocol; Used Functions Of Modbus-Rtu Protocol; Function 0X03 / 0X04 - Readout Modbus Registers Value From Converter - CEL-MAR ADA-4040PC6 User Manual

ADA-4040PC6
31005 1004
TSX5 | POWER [kW] – VALUE LO: CD
UINT32 : CD AB
31006 1005
TSX5 | POWER [kW] – VALUE HI: AB
UINT32 : CD AB
8.2.2. CONVERTER MODBUS REGISTERS TABLE IN - READOUT BY FUNCTION 03 (4X –
REFERENCES) HOLDING REGISTERS
Address Registers
3X Address
41001 1000 TSX5 – sentence for TSX-5 device of SeaTechniK Ltd company
TSX5 | ROTATION SPEED [rev/min] – VALUE LO: CD
UINT32 : CD
41002 1001
TSX5 | ROTATION SPEED [rev/min] – VALUE HI: AB
UINT32 : AB
41003 1002
TSX5 | TORQUE [kNm] – VALUE: AB
UINT16 : AB
41004 1003
TSX5 | THRUST [kNm] – VALUE: AB
UINT16 : AB
41005 1004
TSX5 | POWER [kW] – VALUE LO: CD
UINT32 : CD AB
41006 1005
TSX5 | POWER [kW] – VALUE HI: AB
UINT32 : CD AB

8.3. FRAME STRUCTURE OF MODBUS-RTU PROTOCOL

Device address (1-byte) Function (1-byte) Dane (n-bytes) CRC-16Lo (1-byte)

8.4. USED FUNCTIONS OF MODBUS-RTU PROTOCOL

8.4.1. FUNCTION 0x03 / 0x04 – READOUT MODBUS REGISTERS VALUE FROM CONVERTER
8.4.1.1. READOUT OF CURRENT MEASURED VALUE STORED IN 16-BIT REGISTER [4X / 3X-
REFERENCES]
Function 0x03 / 0x04 are used for readout of status and parameter values from the converter.
Parameter values readout form MODBUS-RTU register is presented by a 16-bit register.
The registers have parameter values in format:
- integer: signed 16-bit - I16 (in C/C++ type short int),
- integer: 16-bit without sign - U16 (in C/C++ type short unsigned int),
- integer: signed 32-bit - I32 (in C/C++ type int),
- integer: unsigned 32-bit - U32 (in C/C++ type unsigned int),
- signed array – CH[ ] (in C/C++ type char[ ]);
The actual measurement value is obtained from the read register using the following algorithms, using the appropriate factor value DW
(see table below), if it has been specified.
Algorithm 1. Readout register is saved to regular type variable (float) and then divide it by the factor DW.
// The fragment of code in C language (VS6.0) presenting above algorithm
short int siMeasurementReg;
float fMeasurmentValue
......
fMeasurmentValue = (float)siMeasurementRegister;
fMeasurmentValue = fMeasurmentValue / DW;
Registers
description
Function code
03 (0x03) Values readout from MODBUS-RTU registers
04 (0x04) Values readout from MODBUS-RTU registers
Description
18
R 16-bit register
U32LO
DW=1
R 16-bit register
U32HI
DW=1
Attribute Value
DW
R 16-bit register
U32LO
DW=10
R 16-bit register
U32HI
DW=10
R 16-bit register
U16
DW=1
R 16-bit register
U16
DW=1
R 16-bit register
U32LO
DW=1
R 16-bit register
U32HI
DW=1
CRC-16Hi (1-byte)