需求
“A home security ladder diagram with an arm switch that sets an armed bit, then front door, back door or motion sensor contacts in parallel that energize an alarm siren when armed.”
接著試試Add a disarm switch.Add a siren delay timer.
這張圖裡有什麼
看懂背後的決策。
01
Parallel OR logic to combine multiple zone inputs
02
Arm/disarm function using a simple maintained switch driving an armed status bit
03
Alarm output directly controlled by the armed status and any triggered zone in series
Suitable for basic residential security system logic programmed on a PLC or soft controller.