Encoder Save/Restore Crashes for Absolute Encoders

[ZLLentz]

Current Behavior

When calling MC_SetPosition during FB_EncSaveRestore, the program will crash if the target Axis has an absolute encoder (EL5042).
This was observed on the TMO motion plc which has a runtime of 4022.29.

Expected Behavior

PLC should not crash

Context / environment

plc-tmo-motion
4022.29
Tong was switching unencoded motors to absolutely encoded.

Steps to Reproduce (for bugs)

1. Configure an axis to have an absolute encoder
2. Call MC_SetPosition

Suggested Solution

If possible, it would be nice to be able to tell which kind of encoder is being used and avoid this block, instead showing a warning to the effect "WARNING: cannot save/restore positions for absolute encoders".
If the bug is still present in the latest runtimes we should report this to Beckhoff.