hfatali Posted July 4, 2023 Report Share Posted July 4, 2023 Hello everyone I started to work with unitronics all in one (plc+hmi) My hmi is usp-156-x10 I'm installed io card and configured modules. I get this error when I download the programs: I/O bus error [code 1] App i/o is ok. But identified i/o is" ????" My modules card is : uid-o8o8r & uia-0402n What should I do? Link to comment Share on other sites More sharing options...
MVP 2023 Joe Tauser Posted July 10, 2023 MVP 2023 Report Share Posted July 10, 2023 For starters make sure the firmware in your PLC matches the version of UniLogic you are using. Then upload your program so we can check it or contact Official Unitronics Support at support@unitronics.com. Joe T. Link to comment Share on other sites More sharing options...
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