Signal Storage of Passenger Lift Controller

Update:2019-11-06
Summary:

The function of external data acquisition module is real-time, accurate collection of external signals in order to accurately and real-time capture floor arrival signals, user request signals and overload signals, effectively prevent the arrival of f […]

The function of external data acquisition module is real-time, accurate collection of external signals in order to accurately and real-time capture floor arrival signals, user request signals and overload signals, effectively prevent the arrival of floor signals and external request signal misjudgment. Due to external interference, the circuit will appear glitches, so that the purity of the signal is reduced, a single glitch will often be mistaken as a system state transition trigger signal, thus seriously affecting the normal operation of the elevator. In order to enhance the anti-interference ability of the system and improve the reliability of the elevator operation, multiple detection methods may be adopted, that is, sampling a signal continuously for multiple times to ensure the credibility of the signal.

In practical applications need to include this function module. External request signal and emergency stop signal are input by key input, the dazenelevator passenger lift automatically rises or falls for 5s, and the overload signal comes from the pressure sensor.

There are 10 passenger elevator controller input request signals (there are 3 lift request and 3 fall request user input ports outside the Passenger Lift, 4 user request input ports in the elevator), because the system does not set the priority for internal and external requests , Each floor of the internal and external request signal can be collected after the first operation, and then stored in memory, but the response to the request signal has a certain priority, namely: When the passenger elevator is in rise mode, only respond to the passenger elevator than The upstairs request signal with a high position is executed one by one from the bottom up until the last upstairs request is executed; if there is a downstairs request from the upper level, the signal directly goes up to the highest floor with the downstairs request, and then enters the descending mode. When the elevator is in descending mode, it is opposite to ascending mode.

During elevator operation, the input of user request signal is discrete, and the response of the system to the request is also discrete. Therefore, the storage of the request signal ensures that the new request signal can not cover the original request signal. Only when the response action is completed Can clear the corresponding request signal bit in the memory. Corresponding to a floor request signal storage, cleaning circuit shown in Figure 3.