I hope someone can help me.
I keep getting a a message while trying to connect:

'No device has been found at all COM-ports!'

I tried all 4 USB-ports on my computer.

The drivers of the serial-USB adapter have been installed.

After trying all ports for 50 times, it will connect once.
If I disconnect the USB cable after that, problems that once again.

This is really annoying. Hope anyone knows how to fix this.

I already tried the option: RS485 delay

My OS: Windows Seven 32-bits
ProfiluxControl 5.1.0.0

Grtz, Chris