Need help choosing an alternative? Let me know your specific use case (PLC brand, communication protocol, OS), and I can recommend a free or low-cost tool.
He reached for the weathered notebook on his desk, flipping to a page where a long string of alphanumeric characters was scrawled. This was the —the "Master Key" to the software’s deepest diagnostic layers. He typed it in with practiced speed. The interface flickered, expanding to reveal the "Test Center," a raw window into the hexadecimal soul of the network. modbus+poll+key+full