erez Posted April 27, 2019 Report Share Posted April 27, 2019 HELLO I have the M91-2-ua2 plc I have also a vfd that work with rs 485. how can I send commands via the rs232 port? Quote Link to comment Share on other sites More sharing options...
MVP 2023 Joe Tauser Posted April 29, 2019 MVP 2023 Report Share Posted April 29, 2019 You've not given us a lot to go on. I'm guessing you want to control the VFD via RS485. What protocol will you be using? Drive manufacturer and model? Link to the drive manual? Joe T. Quote Link to comment Share on other sites More sharing options...
erez Posted May 5, 2019 Author Report Share Posted May 5, 2019 thank you for your answer and YES RS485 YX3000 neutral english manual 2018.11.14.pdf Quote Link to comment Share on other sites More sharing options...
MVP 2023 Ausman Posted May 5, 2019 MVP 2023 Report Share Posted May 5, 2019 If you look in the Help file (in U90 ladder) you will find all you need. In the main index Content\Communications. And in Examples\Modbus\Modbus Master for an example. Believe it or not, Help files are an excellent primary source of information, and where we all got the knowledge from in the first place. If you have further questions once you've built your own program based around the examples then we are glad to help. cheers, Aus Quote Link to comment Share on other sites More sharing options...
erez Posted May 13, 2019 Author Report Share Posted May 13, 2019 Thank for your answer. I know the help files are excelent. I learn all I know for the programming of unitronics from it But still didnt find an answer. I will check again. Thank you Quote Link to comment Share on other sites More sharing options...
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