Controllogix Actual Position Reset

I am using an A-B Powerflex 700-S series II drive with drivelogix to perform a very simple indexing move.

The motor has a shaft mounted encoder, which I have configured in the program. I can get my motor axis to jog, move, home and index to the commanded position just as I want it to, but if I cycle the power (simulating a power loss) to the drive/processor, the actual position resets to zero, although the motor shaft has not moved. Obviously, I want the processor to come back up with the "Actual" actual position.

I have tried moving the actual position to another tag, then moving it back after a first scan, but this doesn't work, as I can't write to the axis-define "Axis_0.ActualPostion" tag.

Really not 100% sure if it is the drive or the processor that thinks the actual position should e zero, but I'm pretty sure it's the processor.

Any suggestions?

I believe what you desire is not possible with the encoder you have. Although I have not worked with the 7000, this should be true for all systems with an incremental encoder. Even if you could retain the last position, there is no guarantee that the axis has not moved from the time since power was lost. You will have to perform a "home" routine in order to find the position you desire. Typically this requires a limit switch somewhere along the axis, along with the Z channel location of the encoder. If you want to retain position after power loss, you will need an absolute encoder.