diff --git a/UpgradePLC.md b/UpgradePLC.md
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@@ -1 +1,17 @@
 # Upgrading the build version of your PLC
+
+---
+
+## 1. Download eXtended Automation Runtime (XAR) 
+You can find it with the Downloadfinder on the [beckhof webpage](https://www.beckhoff.com/de-ch/support/downloadfinder/suchergebnis/?search=XAR) by searching for: XAR <- cursive  
+Download the exe file but **don't** install it on your local PC
+## 2. Open Remote connection to your target PLC
+Open Remotedesktopverbindung. For the connection enter the IP or alias of your Beckhof PLC (whatewer works)
+## 3. Login to PLC
+The user is Administrator and the password is: 1
+## 4. Load XAR to the PLC
+Copy the exe file with ctr+c (on your local machine)  
+then **right click** on the desktop of the **PLC** (in the remote viewer) and paste the exe file
+## 5. Install the new XAR 
+Run the executabele (on the PLC) as administrator  
+the PLC needs to restart and after that you are finished