Smart Monitor Fire Alarm

The fire-alarm control panel at SMPC’s factory sits somewhere hard to reach. Every alarm meant someone had to get to the cabinet before it could be acknowledged or silenced, nobody could see at a glance which building the alarm came from, and there was no digital record of who did what and when. The brief: put the panel’s state on a screen everyone responsible can open immediately — without changing the fire system’s existing hardware or wiring.

This is a life-safety system, so we designed from the PLC outwards rather than from the screens inwards: every command the web can send has to match the program actually running in the panel.

1. 1. Talk to the PLC directly

   We built a PLC bridge that speaks MC Protocol (SLMP) to the factory’s Mitsubishi FX5U over Ethernet, reads inputs, outputs and internal flags every second, and streams them to the web app.

2. 2. Verify the ladder program point by point

   We decoded the factory’s ladder program and matched it against the web’s device inventory point by point, so every input and every on-screen command is bound to the right address in the real panel.

3. 3. Site map and 3D floor plans

   We built a site map over an aerial photo and 3D building plans from the client’s AutoCAD file, then placed every device at its real position with a live status colour.

4. 4. Five access levels, confirm before acting

   Access is split into Super Admin, Admin, Operator, User and Guest. Every command needs a confirmation and is checked again by the PLC’s own conditions, while the emergency button works for everyone on every page.

5. 5. Alert and record everything

   Alerts go to a LINE group when an alarm starts and when it clears, plus a daily summary. Alarm history and the audit trail export to CSV, Excel or PDF.

Monitoring is live in production. Writing commands back to the PLC is built and is switched on as the final step, after witnessed acceptance with the factory on its own network — in a life-safety system, write access is not opened before every point has been verified.

• Every device, visible from any screen

  The people responsible can see every fire-alarm device on the site map and floor plans from a phone, tablet or PC, without walking to the cabinet.

• Every alarm leaves a record

  Every event and every action is logged, filterable by time, zone and status, and exportable as a monthly report.

• Alerts reach the right people

  LINE alerts the moment an alarm starts and when it clears, with an emergency contact list that dials straight from the web app.

• Remote control, ready for sign-off

  Acknowledge, silence, un-silence and reset are built and checked against the PLC program; they are enabled once on-site acceptance is witnessed.