Check to make sure that you don’t have the rotary setting enabled under the User tab in RDWorks. Getting a parameter read error is interesting - what kind of controller are you running? Do you know the model number?
If you have RDWorks, you can click ‘Setting’ in the little device window, then double-click the USB:auto entry and click ‘Test’ - that should tell you.
How do you currently connect the computer to your laser? The test feature in RDWorks software will work with either USB or Ethernet, but you would need to set the address properly for the Ethernet test to work.
In the very first post you said, “my problem is on rdworks…” so I assumed that was the software you were using.
Ahh - Then you will not be able to calibrate your step lengths or check the rotary setting, as those are stored in the controller. You would need to connect a computer to the controller to change those settings, unless you have a very new version, like a 6445, that allows changing the machine setting through the control panel.