At the bottom of the page, it indicates that as of 2.10 build 1301, both the x86 (CX1xxx, CE or XPe) and ARM (CX9xxx, CE Only) target systems are supported.
T_AmsNetID is the AMS Net ID of the Beckhoff Station to execute the function on. For example, one PLC can execute the code for an NT_Shutdown on a remote PLC over the network.
If you simply leave the NetID feild blank, it will assume the local machine and shut down the local machine.