PNPN Coupler is a Devices for Profinet(Industrial Communication Protocol from Siemens)  Data Exchanges.This device allows 1440 Bytes Max. Inputs and 1440 Output Max. Outputs(in Firmware 4.0). Note that it is not necessary to match the amount of input and output the same.(for example setup the inputs in 1200 bytes but 1440 bytes in outputs) And Also,You can configure this configuration in the same step7 project/ separate projects.  In this post … Continue reading Siemens#Using PNPN Coupler