Easy data exchange between two Siemens Simatic S7 PLCs on different Ethernet subnets using a PN/PN Coupler Suppose you have two Simatic S7 PLCs, like a S7-1200 and S7-300, on different Ethernet subnets and you need to exchange some data between them. An extremely easy way to do this is to use a PN/PN coupler … Continue reading TIA Portal, S7 – Exchange Data Between Simatic PLCs on Different Subnets