Yes 👍 This message most likely means the machine detected a web break — the film stopped unwinding, or the web tore. In the PLC it is linked to the Web Break signal and the Web Break Solenoid Valve output, so it concerns film-tension / web monitoring. Source

What to check first 🔧

• Is the film actually threaded and not torn? Check the whole path from the unwinder onward.
• Does the unwinder turn freely? Reel not blocked, brake / tension not too high.
• Film tension — too low reads as "not moving", too high can tear it.
• Film / motion sensor — dirty or misaligned sensor, or a loose connector.

Source

Recommended recovery ✅

1. Stop the machine safely.
2. Re-thread the film and clear any tear.
3. Clean the web-break / motion sensor and check the unwinder runs freely.
4. Check air pressure and the valves in this section, reset the alarm and start slowly.

Source