It's easy
1) Install Control Builder M on your computer
2) Connect the TK212 tool cable to port 4 on the 856 CPU
3) Run the "Set IP config tool" and set a new IP-address
4) Connect your computer and the 856 CPU to an Ethernet network
5) Open Control Builder M and create a new AC800M project
6) Right Click on the AC800M icon and select CPU 856 model
7) Double-click on 856 icon and change the IP-address to the one you set
8) Create a program
9) Assign a task
10) Press download
11) Ready! Should take you max 10 mins to test