Proficy Machine Edition Programming Guide -

| Language | Best Used For | PME-Specific Tip | | :--- | :--- | :--- | | | Discrete logic, safety circuits, simple interlocks | Use coils and contacts exactly as you would on a hardwired diagram. Watch for the "power flow" concept. | | Structured Text (ST) | Complex math, loops, string handling, array manipulation | PME's ST is case-sensitive. Use := for assignment, not = . The guide has an essential appendix on ST syntax. | | C Block (C) | High-speed calculations, legacy code migration | Warning: C blocks are powerful but not supported on all newer CPUs. Check your target's compatibility first. |

Unlike fragmented ecosystems where you must learn a different IDE for HMI and logic, Machine Edition’s "View" (HMI) and "Logic Developer" (PLC) components share the same engine. This guide provides a deep dive into the architectural patterns, coding standards, and advanced troubleshooting techniques required to master the Proficy Machine Edition Programming Environment. Proficy Machine Edition Programming Guide

Important: Stop buttons must be Normally Closed (NC) in the physical world but Normally Open ( ] [ ) in the logic? No. In Machine Edition, wire the physical stop as NC, but the instruction in the ladder must be a Normally Closed ( ]/[ ) contact to read the "energized" state as logical 1. | Language | Best Used For | PME-Specific

Displays the properties of any selected object, such as a hardware module or a logic block. Use := for assignment, not =

The official guide lists these as top support issues: