Difference in S-0-0047 and P-0-0047

[ArcherThompson]

We are seeing a case Where S-0-0047 and P-0-0047 are differing when scoping. S47 is correct but p47 bounces +- 100 degrees occasionally. This causes a fault of course. I cant figure out why they would be different values. 

[Trumpf_Gunnar · Accepted solution]

The "S‑0‑0047, Cyclic position control: Command value" cyclically transmitted/written by the control unit is displayed in the parameter "P‑0‑0047, Cyclic position control: Active command value". When reading S‑0‑0047 (e.g., oscilloscope or drive telegram), the drive provides "P‑0‑0434, Position controller: Position demand value", that takes effect directly at the position controller input.

[ArcherThompson]

Thanks, I am not sure why I was struggling with that but I understand now.