How do I make an HMI communicate with more than one PLC through an Ethernet connection?
Using Delta’s communication converter, the IFD9506 allows information to be transferred between the Ethernet protocol and RS-485 fieldbus network. Adopting the IFD9506 for extension, an HMI can communicate with more than one PLC, and reduce the loading on HMI’s built-in RS-485 communication port to provide better communication quality and faster response. See below for the system architecture.