AiVibeSoft PLC (PC-Based Control)
A soft PLC is a software runtime that turns an industrial PC or embedded computer into a programmable controller, executing IEC 61131-3 programs with deterministic timing instead of relying on dedicated PLC hardware.
A soft PLC runtime is installed on an industrial PC, an embedded controller or a virtual machine. To achieve deterministic control alongside a general-purpose operating system, runtimes typically use a real-time operating system, a real-time extension or a hypervisor that isolates control tasks from other workloads. I/O is usually connected through fieldbuses or industrial Ethernet such as EtherCAT, PROFINET or EtherNet/IP rather than through backplane modules.
PC-based control is used where machines need substantial computing power alongside logic control, for example coordinated motion, vision, data logging, analytics or HMI on one platform. It also underpins software-defined and virtualised control, where control applications are deployed and managed more like IT software. CODESYS is a widely known example of a hardware-independent IEC 61131-3 development system and runtime used by many device manufacturers.
Key considerations are real-time performance and jitter, hardware lifecycle and availability, operating-system patching and cybersecurity, and how the runtime behaves after power loss or a PC fault. Industrial PCs need appropriate environmental ratings, and retentive data must survive restarts. Soft PLCs are not safety controllers by default; safety functions require separately certified safety hardware or runtimes.
Key points
- Runs IEC 61131-3 programs on industrial PCs or embedded computers
- Determinism comes from real-time operating systems, extensions or hypervisors
- I/O is typically connected over fieldbus or industrial Ethernet
- Combines logic, motion, HMI and data processing on one platform
- Safety functions need separately certified safety hardware or runtimes
Where AiVibe comes in
AiVibe designs and manufactures the AiAmbA AI Factory, whose edge devices and AI agents let people talk to PLC, CNC and robot controllers in plain language. Agents only propose changes, a trained operator confirms each one, and the AI Factory never replaces a machine's control or safety systems.