| Escalators are widely used in hotels, shopping malls, subway, train stations, office buildings, airports and other places, in the convenience of our customers and improve the quality of service has played a very important role.This design uses a PLC control system, high reliability, stability, programming is simple, easy to use, repair and maintenance convenience obvious advantages. Compared with the relay control escalators have a qualitative leap. It implements a computerized control of the escalator, so that the escalator more intelligent.Running from the elevator maintenance safety requirements and operating requirements, and taking into account the convenience of elevator operations, programming realization of three main operating states:automatic operation, manual operation, maintenance running. Under normal circumstances, the escalator into the auto-run state; when the occurrence of certain special circumstances, the escalator in the role of the external hand signal, to enter manually run the state, when the system overhaul, insert the repair box, enter the maintenance state.Control program in the PLC logic required in the signal processing circuit first security detection signal, by processing these signals are given the appropriate operating status display and alarm signal.The escalator has two-way operation,emergency stop, maintenan ceoperation,stepchain safety protection,handrail entry protection, combsafety protection,cascade subsidence protection,non operating reversal protection, overspeed protection,overload protection,drive chain safety protection-standard function, also has the apron safety protection. handrail monitoring, apron brush, motor overheating protection,earthquake protection, monitoring of cascade loss matching function, to meet the different needs of customers. |
