Using a PLC (Programmable Logic Controller) for automated management of stairwell lighting is a relatively ideal method for public stairwell lighting. It has the following two characteristics:
1. To go up or down the stairs, simply press a button, and the lights on each floor will turn on and off sequentially, with each floor's lighting time being 10 seconds. The time can also be reset according to specific needs, which can greatly save energy.
2. When several households go up or down the stairs at the same time, the stairwell lights can still be turned on and off in sequence, and the electricity cost will be shared equally. The electricity meter of the user who stops using the lights first will stop measuring electricity, so the burden is reasonable.
