Every safety function must be explicit. Every path from sensor to output must be traceable. The software doesn’t just let you build; it watches you. Mismatched data types? It will tell you. A feedback loop that bypasses a safety condition? It will refuse to compile. In this way, the tool becomes a silent second pair of eyes—a co-pilot who has memorized EN ISO 13849-1 and won’t let you cheat. Under the hood, Flexi Soft is a modular system: a head unit (CPU) plus expansion modules for inputs, outputs, relays, and communication (EtherNet/IP, PROFINET, PROFIBUS, etc.). Flexi Soft Designer manages this hardware puzzle effortlessly. You define your module arrangement in a rack view, and the software automatically assigns addresses, checks power budgets, and validates cross-module wiring.
It made safety invisible. And that is the highest compliment you can pay. flexi soft designer
from SICK is that tool.
And when that machine runs its first full shift without a single false trip—when the safety gate opens and closes like a sigh, and the light curtain parts for a pallet like a curtain on a stage—you realize the tool did exactly what it was designed to do. Every safety function must be explicit
The genius of the tool is not complexity, but contained complexity. You don’t write ladder logic. You don’t type a single line of ST. Instead, you wire blocks together with virtual connections, defining parameters in clean dialog boxes. Muting timers? Set in milliseconds. Contactor feedback? One checkbox. Reset type? Manual, monitored, or automatic—your call. What makes Flexi Soft Designer fascinating is what it demands from you. Traditional PLC programming rewards cleverness—tight loops, reusable functions, elegant state machines. Flexi Soft Designer punishes cleverness. It rewards clarity . Mismatched data types