How to convert a PIW speed to a % on HMI

[Benm4115]

Hi,

Im having a practice with a Siemens MM420, using siemens S7 via profibus, im struggling with the status PIW speed ref. I want to convert this figure decimal or hex displayed on HMI into a percentage reading any tips or help with the code required.
Thanks

 

[KalleOlsen]

Hi!
The speed value is refering to P2000 and when equal it is 16384(4000Hex). Example: P2000 = 50 (hz), speed value is 25 Hz, reading is 8192(2000H).

The simples way to convert to pct is like this (all int):
L PIWspeedvalue
L 164 // Edit: rounded up 16384/100
/I
T SpeedValueInPCT

Kalle