What is PLC Programming?
Programmable Logic Controller programming
PLC programming is the development of control logic for Programmable Logic Controllers — ruggedised industrial computers that automate machinery and processes — typically using IEC 61131-3 languages such as ladder logic and structured text.
IEC 61131-3 languages
The IEC 61131-3 standard defines five PLC languages: Ladder Diagram (LD), Function Block Diagram (FBD), Structured Text (ST), Instruction List (IL), and Sequential Function Chart (SFC). Ladder logic remains the most common for discrete machine control; structured text suits complex calculations.
From logic to live plant
Robust PLC programming covers I/O mapping, interlocks and safety, sequencing, alarm handling, and HMI/SCADA integration — all rigorously tested (FAT/SAT) before commissioning. Pontis delivers PLC/HMI programming across major platforms.
Frequently asked questions
Which PLC language should I learn first?+
Ladder logic is the most widely used and the easiest to read for electrical/controls backgrounds; structured text is valuable for math-heavy or data-handling tasks.
Pontis Systems Engineering
Controls & Critical Infrastructure Engineering Team
The Pontis Systems engineering team designs, integrates, and commissions BMS, SCADA, data-center, and industrial-automation systems across Africa. As a Schneider Electric EcoXpert™ certified partner and Digital Realty delivery partner, the team works to global standards on mission-critical infrastructure.
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