Delta HMI to Siemens S7-300 Direct MPI Connection Manual

This document provides detailed connection instructions and wiring diagrams for linking Delta HMI (Human-Machine Interface) series (DOP-A/AE, AS57, AS35/AS38, B) to Siemens S7-300 PLCs via Direct MPI protocol using RS-485 communication. It also defines the complete PLC read/write address formats for registers and contacts, including data types, ranges, and special notes on baud rate, multi-HMI connections, and Highest Station Address (HSA) configuration.