22 Indicating Symbols Setting for Landing Display
Using the handheld operator to set at will the varied display symbols or marks for each floors, for instance, “B” for underground ONE.
23 Attendant Service
Using the switch in the car operation panel, one can put the elevator into attendant service, under which the automatic door closing is absent and the door can only be closed when attendant keep pressing the door-closing button. Meanwhile the function can also allow attendant to choose direction and by-passing.
24 Independent Travel
Independent Travel is an exclusive travel, during which the elevator overlooks all landing calls and the automatic door-closing is absent. Other features are similar to Attendant Service.
25 Dot-matrix Landing Indicators
Dot-matrix Landing Indicators are used both in the car and on the landing, displaying such information as the floor position, running direction, elevator status and etc
26 emergency elevator returning against fire
When encountering fire, passenger set the fire returning switch in position. Elevator immediately cancels all the instruction and call and travel to firefighting station for door-opening and stand-by.
27 Automatic Correction in Landing Position Signals
The traveling elevator system compare its own position signals at each terminal switch and the leveling switch of each landing against those obtained by self-study and making automatic data corrections accordingly.
28 Elevator Lock-in
Setting the lock-in switches of elevator in automatic mode or with attendant, and clear up all the registration call. The elevator only respond to the in-car instruction until no new instructions registered. Then the elevator returns to the base station, turns off in-car lighting and fan after opening the door automatically, lighten the door-opening button indicator, and automatically close the door when 10 seconds time delay expired. Finally, the elevator stops running, and will be back to operation when the lock-in switch reset.
29 Protection against Door-opening outside Door Zones
The door cannot open outside the door zone, which is preset by the system for safety concern.
30 Light Gate Protection for Doors
Every elevator is equipped with a light gate door protection, whenever any object appears or stays between the closing doors, the light gate protection or safety contact plate will be activated to reopen the doors. The light gate protection is not in effect when elevator is in fire-fighting mode.
31 Over-load Protection
With the over-load switch functioning, the door remains open with alarm buzzing on
32 Anti-nuisance at Light-load
When the elevator is in light-load mode, the in-car registrations have reached or exceeded the setting value. The system will clear all the registrations.
33 Reversing Protection
When the system has detected an inconsistency between the elevator registered direction and travel direction for a while, an emergency stop will be activated with alarm buzzing on.
34 Operation Time Limiter
If the elevator in operation has traveled incessantly for a longer time than the value preset by the time limiter (max.45s) without leveling, all elevator operation will be stopped.
35 Deceleration switch failure protection
When encountering the deceleration switch failure, elevator land in emergency to avoid possible top or bottom floor collision
36 Protection against terminal over travels
Both the uppermost and the lowest ends of the hoist way are mounted with limit switches and speed retardation switch to prevent any elevator over-travels
37 Contact Detection protections of Safety Relay and Contactor
The system checks up the contact reliability of the safety relays and contactors. If any inconformity between the contact movement and the working status of the coil is detected, all car movements will be stopped.
38 Main Circuit Fault protection :
Emergency stop occurs once system receives the signals indicating failure of main circuit. This function is also able to prevent running of an elevator at fault.
39 Master CPU Protection by WDT
The master control PCB is integrated with WDT protection. When any CPU or program problems are detected, the WDT Circuit will make a forced cutoff at the output terminals of the Master Control and reset the CPU.
40 Over speed Protection :
This protection function is provided to avoid safety problems due to elevator running speed higher than control limit.
41 Under speed Protection :
This protection function is provided to avoid safety problems due to elevator running speed lower than control limit.
42 Leveling Switch Fault Protection :
A protection functions to be activated in case of abnormal situations caused by failure of leveling switch.
43. CAN Communication Fault Protection :
It prevents possible danger in case of CAN communication failure and elevator keep running.
44. Safety contact pad Protection :
When the door is about to close and door safety cont