Try the PLC in your browser — no hardware needed. The real device shows this same page.
How to use this demo: pick a sample program below — the logic loads automatically
and instructions appear. Then click the green IN buttons (they simulate your real switches
and sensors) and watch the Q output lamps respond. On the real PLC the screens are
identical — you just press Save & Apply at the end.
1. Choose a Sample Program
2. Live I/O — click the IN buttons to test
IN1–IN4 simulate your push buttons / sensors / float switches.
Force buttons: A=auto (logic controls output), 0=force OFF, 1=force ON.
W1–W4 are virtual web switches (control from a phone).
3. Output Logic (this is what each sample configures)
Conditions read top to bottom: first condition starts the rung, each next one is
combined with AND (series contact) or OR (parallel branch).
NO = normally open, NC = normally closed (inverted).
Modes: Direct output follows rung · TON on-delay timer ·
TOF off-delay timer · Toggle push-button flip-flop ·
Latch rung sets the output, the Reset condition clears it (reset wins). In this demo every change works instantly. On the real PLC press "Save & Apply".
4. Time Switches (DS3231 RTC) — T1–T4
Demo clock:--:--:--
Each switch is ON between its start and end time every day
(end before start spans midnight, e.g. 18:30 → 06:00). Use T1–T4 as a
condition source in any rung above. Tip: jump the demo clock to just before the
ON time and watch the output switch by itself.