Data Acquisition of VFD from cDAQ in MATLAB

I am have cDAQ of NI, I need to aquire data from VFD (132F 0002 danfos) connected to a three phase induction motor, I am new to use cDaq and VFD , i need idea of configurating daq to vfd and matlab, so as to fetch the data and simulate further

Answer 1

[Walter Roberson]

You need an RS485 based MODBUS interface to talk to that device. You might be able to find a cDAQ device that can handle that, but there are alternatives such as discussed at https://www.mathworks.com/help/supportpkg/arduino/ref/arduino-example-modbus-rs485.html?searchHighlight=rs485%20&s_tid=srchtitle_rs485%2520_17

On the MATLAB side you could use the Test and Measurement toolbox, which has modbus functions built in https://www.mathworks.com/help/icomm/ug/create-a-modbus-connection.html

The device you are using appears to be https://store.danfoss.com/ca/en_US/Drives/DrivePro%C2%AE-Services/Exchange-Units/FC-051PK37S2E20H3XXCXXXSXXX/p/132F0002 which has an RS485 interface but does not have an ethernet interface (MODBUS is usually RS485 or else TCP). So the interface between your host and RS485 has to be figured out. I see some sites offering USB to RS485 convertors, and that might be good enough for your purposes when used with Test and Measurement

[Yashaswini]

Thanks for you answer Walter, i tried conecting USB TO RS485 converter using serial explorer and command line, but i m error(have attached that image), also does VFD gives the experimental data, I have simulate the motor model with data aquired, is that possible using VFD

[Walter Roberson]

The device uses MODBUS-RTU protocol for communications. That is a binary protocol that does not use "lines". The device does not (appear to) support the MODBUS ASCII protocol (which is a text protocol that does use "lines")

[Yashaswini]

hi , can you please tell me how can i communicate then, do i get continous data from VFD

[Walter Roberson]

See modbus from the Industrial Communication Toolbox (previously known as the Instrument Test Toolbox)