1. This document provides instructions for using the TRILOGI PLC Ladder Diagram Programmer and Simulator software. It describes how to open and simulate programs, transfer programs to a PLC, monitor the PLC online, and input a new program using contacts, relays, timers and custom functions. 2. Key steps include opening a file, simulating the program, starting the server, downloading the program to the PLC, and inserting circuits, contacts, relays and outputs to build a ladder logic diagram. Custom functions can also be added and edited. 3. The instructions include examples of a completed ladder logic diagram with AND/OR logic and a pulse timer, demonstrating how to use the