Hello Urban. While that particular version of the Compax3 is not really covered by this forum, I can give you some advice based on my experience with other Compax3 drives.
First of all, that green bar you see in the lower right just means that Servo Manager was able to open the com port. It does not mean you have a connection to the drive.
There are two main reasons users are not able to connect to the Compax3:
There are also other things I have seen that will prevent communications:
It is also possible that you have a damaged drive. However, that is very unlikely. Nearly every time I have seen a communications issue with a Compax3, it was because of one of the things mentioned here (usually items 1 and 2). I hope this helps get your application back on track.
Thank you for your answer.
Actually my problem was both 1. and 2. reason you pointed out. Now that I got the right cable and the right USB converter I manage to connect Compax3 with PC.
Thank you very much for your help.