Hi, how many parameters can you seen in Par.Group 50 ? In case you have Standard firmware in acs800, you should see 7 parameters in group 50. In case of Multidrive there are 14 parameters related to Encoder Speed Measurement group 50. As far as I know there are hidden parameters in group numbers above 99 protected by password for ABB specialists, related to IGBTs timing, etc. So for Encoder there should be all parameters accessible through CDP312 panel or through DriveWindow.