The magic trick here that makes it work is a chunk of data called a Procedure Linkage table (PLT), a table in the program that lists every function that a program calls.

The goal of the linkage port logistics in service is to aggregate the whole service procedure, the procedure of service to the customer is not individual, but providing the aggregated service.

Molding machine is controlled by PLC linkage procedure. It can run long and stably just need one time adjust.