Usually caused by selecting the wrong COM Port. Check Device Manager to see which port your cable is using.
to see if the KD-C100 or its "KD-C1" cousin profile works for your specific firmware. Community Forums : Platforms like RadioReference Wln Kd-c100 Programming Software Free
The Wln KD‑C100 programming software is used to configure and update settings for the KD‑C100 series keypads/controllers (commonly used in access control or security systems). Below is a concise, solid text you can use as a description, readme, or brief guide: Usually caused by selecting the wrong COM Port