Andrew_Spencer_Brennan Posted October 6, 2018 Report Share Posted October 6, 2018 Good day All Im wondering if someone will be able to assist me with the following. we have a few in house built machinery that runs off Arduino Controllers. We needing to link it up to a Unistream HMI to Display the Data. I know it can be done via Modbus. Im just needing some help with the initial Modbus from Arduino to Unistream setup Please Assist where you can Quote Link to comment Share on other sites More sharing options...
MVP 2023 Joe Tauser Posted October 6, 2018 MVP 2023 Report Share Posted October 6, 2018 What have you done so far in ArduinoLand on the Modbus stuff? Which model? Will the Arduino be a slave or a master? Joe T. Quote Link to comment Share on other sites More sharing options...
Andrew_Spencer_Brennan Posted October 7, 2018 Author Report Share Posted October 7, 2018 Hi Joe I have done a lot with Arduinos but never before had to do Modbus with them. Ive done Modbus between PLCS and other controllers just not Arduinos. Im going to use and Arduino Mega. it will be a slave device from the Unistream. Quote Link to comment Share on other sites More sharing options...
ORSO2001 Posted October 7, 2018 Report Share Posted October 7, 2018 Hi Andrew, exist many arduino library to use modbus RTU or TCP protocol..both master and slave...then how do the sketch depends on which library you will choose. each library include examples and someone also a manual...pay attention that Arduino MEGA doesn't has a native RS485 or ethernet port then you will need some extra board (usually cheap). Quote Link to comment Share on other sites More sharing options...
Andrew_Spencer_Brennan Posted October 7, 2018 Author Report Share Posted October 7, 2018 Thanks, once the parts arrived i will let you guys know if i come right Quote Link to comment Share on other sites More sharing options...
Franco Yañez Posted May 30, 2020 Report Share Posted May 30, 2020 Dear, Do you have news about this development? I also have the need to be able to communicate arduino with PLC Unistream. Tried some modbus TCP / IP libraries, but had no success. Thanks in advance for your answers. Quote Link to comment Share on other sites More sharing options...
MVP 2023 Joe Tauser Posted May 31, 2020 MVP 2023 Report Share Posted May 31, 2020 Setting up the first communication between two devices can sometimes be tricky. Upload your UniStream program so we can see how your Modbus is configured in it. Joe T. Quote Link to comment Share on other sites More sharing options...
marquez rub Posted January 21, 2021 Report Share Posted January 21, 2021 does anybody has another tip to do? i´m trying to conect arduino and usc tr 22 by serial communication but not success Quote Link to comment Share on other sites More sharing options...
MVP 2023 Joe Tauser Posted January 21, 2021 MVP 2023 Report Share Posted January 21, 2021 The mini USB port on a USC controller can't be used for serial communication. If you look at your PC's device manager when you connect the PLC you'll see it pops up as a network adapter. If you want a serial port you'll need to add a UAC-CB-01RS2 RS232 port. Joe T. Quote Link to comment Share on other sites More sharing options...
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