S7 PLC to PLC Communication using GET/PUT Instructions in Siemens TIA Portal

Community How-to-Tutorials
#1

It is common to find multiple PLCs within a single installation in modern industry. It can be different parts of the process that interact with each other or redundant systems that ensure continuity of service. Data exchange between PLCs has become simple to implement thanks to fieldbuses which allow a reliable real-time connection. 

This is a companion discussion topic for the original entry at https://www.solisplc.com/tutorials/s7-plc-to-plc-communication-using-get-put-instructions-in-siemens-tia-portal
#2

This is all well and good as long as you have both PLCs in the same project.
But what if the PLC are in 2 different TIA projects? Is communication using GET/PUT still possible in that case, and if so, what do you need to do to make it work?