I am having this issue as well. In my case the VFD is a 'W-120' which is a G-120 with an AOP30 HMI. I can not get Starter to connect with it either with my own serial cable or the one attached to the AOP30. PG/PC interface set correctly, diagnostic test comes up with a node (0) checked, but it won't connect further. I am using a newer PC (Windows XP) that has no serial port, so I am using a USB to Serial connector (found in this forum), an SW-4282. I tried another USB to Serial and had the same results. I know it is possible to connect as listed in the first post here (did it in training class in GA using the desktop computer).

What am I doing wrong?

In your case, I'd like to use Profibus DP instead of USS.

Yeah, that would be nice, but I don't have a Profibus card on my laptop and really don't want to have to buy one and wait for it to arrive. End user is getting impatient as it is.

If I have to, I will. Do you recommend a particular profibus card/cable?

Thank you

One thing I just thought of is that the Profibus connector on the CM240S DP is connected to a network. Is this interfering internally? On one VFD that connection is functioning normally, on another the bus fault LED is on.