This is one of the most powerful features of the Route Control System. Route elements, such as valves and pumps, can be incorporated in any route, regardless of the PLC to which they are connected, allowing for plant-wide control across all PLCs from one central location.
For instance, if PLC#2 is the one containing the transfer logic, i.e. the “brain” that determines the sequence of steps involved in carrying out a product transfer from the Tank Area, via the Transfer Area and into the Filler Area, then PLC#2 will only have to issue functional commands such as “Open Tank Outlet”, “Start Pump” and “Open Filler Inlet” while RCS will take care of activating the corresponding valves and pumps that have been configured behind those functional commands.
In this example, PLC#2 is completely unaware of the fact that the outlet valve for tank BBT01 is attached to PLC#1 and the inlet valve of FILLER01 is attached to PLC#3; this is all managed by RCS. And, as if this weren’t impressive enough already, any errors in the route are all reported back to PLC#2, enabling the transfer logic to take immediate corrective actions.