OPTA Lite No Longer Allowing LD Downloads

[steve9]

might be worth checking these posts to see if they're related

Urgent Assistance Needed: Connectivity Issue with Opta PLC and Arduino IDE

Dear Arduino Forum Community, I'm reaching out for urgent assistance regarding a connectivity issue I've encountered with Opta PLC and Arduino IDE. Here's a breakdown of the problem: Previously, I had been successfully working with Opta PLC in January and February without any issues. However, when attempting to connect Opta to my computer yesterday using Arduino IDE, I encountered a peculiar issue. Upon connection, Arduino IDE unexpectedly removed the lower COM port, leaving only the higher …

Upload to Opta and communication errors with PLC IDE

After ignoring the Opta for a long time, I am making a second attempt to program the Opta with the PLC IDE 1.0.3. But unfortunately it is a disappointment again and I end up with one problem after another. Even if I can communicate with the Opta and download the program, I get one error message after another. But apparently the program was downloaded and started anyway. but communication with the Opta is no longer possible. After closing the PLC IDE a few times, communication with the Opta is re…