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Saia PLC (Saia PCD) — Detailed Software Report

2.2 Key Features of SAIA PG5

1. Multi-Language Support (IEC 61131-3) PG5 fully adheres to the international standard IEC 61131-3. You can mix and match:

• IL (Instruction List): Low-level, text-based for legacy users.
• LD (Ladder Diagram): Graphic, relay-logic style ideal for electricians.
• FBD (Function Block Diagram): Data-flow oriented for process control.
• SFC (Sequential Function Chart): Perfect for state-based processes (e.g., batch reactors).
• ST (Structured Text): High-level, Pascal-like syntax for complex algorithms.

2. The Fupla Editor (Unique to SAIA) One of SAIA’s most distinctive features is Fupla (Function Plan) . It is a graphic, signal-flow language similar to FBD but with superior visual optimization. Fupla is exceptionally efficient for: saia plc software

• PID control loops.
• Mathematical operations.
• Signal filtering and scaling. In many case studies, engineers report 30% faster development time using Fupla compared to Ladder Logic for process-heavy applications.

3. Simulator (PG5 Simulator) Before you connect a single wire, the PG5 simulator allows you to run your logic on your PC. You can: Saia PLC (Saia PCD) — Detailed Software Report 2

• Simulate digital and analog I/O.
• Force variables.
• Test timers and counters under virtual loads.
• Debug SFC transitions without hardware.

4. Web Visualisation (Web-Visu) Unlike older SCADA systems, SAIA PLC software includes native web server capabilities. You can design HMI screens directly in PG5 that are served as HTML5 pages from the PLC. This means: IL (instruction list)

• No additional SCADA license costs.
• Access from any smartphone or tablet browser.
• Real-time data without middleware.

Core components

• PG5 Controls Suite — the main engineering package; includes:
  • Project Manager — multi-controller project handling and deployment.
  • Editors — Fupla (graphical function-block), IL (instruction list), Graftec (graphical flow), Kopla/other dialects depending on version.
  • Symbol Editor — local/global/network symbols and symbol groups.
  • Network Configurator — device discovery and communications setup (Modbus, BACnet, S-Bus, others supported by device drivers).
  • WebEditor (S‑Web) — generates web-based HMI pages for PCD web servers (Java-based widgets, macros, trending, alarm pages).
  • Standard & domain libraries — ICA/core automation, HVAC/building automation libraries, and special-purpose libraries.
  • Communication drivers — built-in drivers for common fieldbus and IT protocols (Modbus, BACnet, OPC, SNMP depending on firmware).

4. Unique Features Not Found in Most PLC Software

| Feature | Description | |---------|-------------| | True Redundancy | No scripting – drag-and-drop redundant processor pairing. Automatic sync of all variables. | | S-Web Native | PLC serves full dynamic web pages (HTML, AJAX, JSON) without external gateway. | | PG5 to Excel link | Live data exchange between PLC and Excel for reporting/trending. | | Secure Boot & TLS | Built-in certificate management, encrypted firmware updates. | | Remote firmware update | Over-the-air (OTA) for field devices. | | Multi-lingual project | Comments and tag names can have language variants. |