Saia PCD3 Series HMI Connection Manual

This document provides technical specifications for connecting an HMI (Human Machine Interface) to a Saia PCD3 Series PLC, including factory settings, wiring diagrams for RS-485 communication, and detailed definitions of PLC read/write addresses. It covers register formats, contact types, data ranges, and addressing rules for inputs, outputs, flags, registers, data blocks, timers, counters, and text objects.