JPH0739320B2 - Elevator control equipment - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to an elevator control device that controls an elevator by a microcomputer.

[Prior art]

In recent years, due to the development of microelectronics, LSI, V
LSIs have come to be offered as inexpensive and highly reliable elements, and are widely used in elevator control devices. For example, Japanese Patent Laid-Open No. 62-111880 discloses, for example, an E ² PROM (Electrocally Erasa) as a storage device for storing a program for elevator operation / management.
ble and Programmable Read Only Memory: Simply E ² PR
OM) is proposed to be used. However, this E ² PROM can store elevator control programs and elevator control data,
Since the electric charge is erased by an electrical method, the reliability of the device itself depends on the EPROM (Erasable Programmable Read On
ly Memory: Low compared to hereafter called EPROM),
For this reason, the E ² PROM is not completely adopted for storing elevator operation and management programs. FIG. 4 is a block diagram showing the basic configuration of a conventional elevator control device. In the figure, reference numeral 1 is a microcomputer constituting an elevator control device, a CPU 2 which controls the whole and executes a given work, a control program necessary for operation and management of the elevator, and fixed data for the elevator (for example, , ROM3 for storing elevator rated speed data, remaining distance pattern data, etc., and E for storing data unique to the building in which the elevator is installed (for example, floor height measurement data, number of stops in the building, etc.) ^{2 It} consists of PROM4 and RAM5 that temporarily stores the data necessary to execute the elevator control program on CPU2, and these are connected via the bus.
It is connected to CPU2.

[Problems to be Solved by the Invention]

In the conventional elevator controller, the E ² PROM data is
For example, from the viewpoint of reliability that it may change during program execution, it is not used in the program space and is mainly used only as a data area. Therefore, data unique to each building, such as data for preferentially operating only the first floor and the third to fifth floors only in the morning hours according to the customer's request, must be stored in the ROM. Therefore, the contents of the ROM are different for each building and each construction, and there is a problem that it takes time to manufacture and manage the factory. In addition, since only data can be stored in the E ² PROM, and standard programs and building-specific programs must be stored together in the ROM, the ROM capacity can be increased and the number of ROMs can be reduced. It increased and was not economical. Also, recent ROM, since the E ² PROM has become possible to provide an inexpensive larger storage capacity, only the stores the order data for each construction in E ² PROM, a free area of the E ² PROM Became big and was uneconomical. The present invention has been made to solve the problems as described above, it is possible to use the E ² PROM for storing the control program, the use of E ² PROM, a safe and reliable elevator To obtain an elevator control device that enables operation and management.

[Means for Solving the Problems]

The elevator control device according to the present invention is applicable to any elevator, and includes a first storage means for storing a standard operation / management control program and data such as speed commands, an optional program unique to a building, and a failure. A second storage unit that stores a diagnostic program and the like and is capable of writing data from the central processing unit, and a program execution time of the second storage unit are counted. When the count value exceeds a set value, the second storage unit And timer means for stopping the program execution of the storage means.

[Action]

In the present invention, the timer means monitors the program execution time of the second storage means, and when the program execution time exceeds the set time of the timer means, the execution of the program of the second storage means is stopped. The operation / management of the elevator is executed by the control program of the first storage means. Therefore, the operation and management of the elevator is not disabled due to an abnormality in the program of the second storage means, safe and highly reliable elevator control is possible, and the second storage means (E ² The program can be stored in the PROM), the second storage means can be effectively used, and the first storage means can be used.
It enables to reduce the capacity of the storage means.

【Example】

An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram showing a basic configuration of an elevator control device according to the present invention, FIG. 2 is a schematic configuration diagram of an elevator to which the present embodiment is applied, and FIG. 3 is a flowchart for explaining an operation in the present embodiment. . First, in order to clarify the description, a schematic configuration of an elevator in which the elevator control device according to the embodiment is installed will be described with reference to FIG. In FIG. 2, a sheave 7 is driven by an electric motor 8. A rope 9 is wound around the sheave 7, a car 10 is connected to one end of the rope 9, and a counterweight 11 is connected to the other end of the rope 8. The electric motor 8 is pulsed in proportion to its rotation speed. A pulse generator 12 that generates a signal is directly connected. Reference numeral 13 is a counting circuit for counting the pulse signals output from the pulse generator 12, and the count value 13a of the counting circuit 13 is fetched by the elevator controller 14 at every calculation cycle. Reference numeral 15 is a three-phase AC power supply, and the electric motor 8 is connected to the three-phase AC power supply 15 via a power converter 16 and a contactor 17. The elevator control device 14 is for operating and managing the car 10 by inputting a hall call or a car call, and converts the torque command 14a into electric power based on the deviation between the reference speed command and the count value generated therein. Output to the controller 16 and an ON / OFF command to the contactor 17 when starting / stopping the elevator
It is designed to output 14b. The power converter 16 is composed of a thyristor, a transistor (neither shown), etc., and has a torque command 14
Adjust the power of the three-phase AC power supply 15 based on b
It controls the torque and rotation speed of the. In FIG. 1, an elevator control device 14 is composed of a microcomputer, and a central processing unit (hereinafter, abbreviated as CPU) 131 that controls the whole and executes a given work, and travels according to a hall call or a car call. ROMI 132 that stores fixed data such as standard operation and management control programs and reference speed commands that can be applied to any elevator required to stop, optional program unique to the building and floor height measurement value E ² PROM 133 for storing data such as data and the number of building stoppages, and RAM 134 for temporarily saving data required for executing the control program on the CPU 131,
An input device 135 for loading the count value 13a from the counting circuit 13 into the CPU 131, an output device 136 for outputting a torque command 14a and a contact ON / OFF command obtained by the arithmetic processing in the CPU 131, and an E ² PROM 133. The calculation time of the program to be executed is counted, and when the count value exceeds the set time, CP
The interrupt device 137a is output to the U131 and the output device 13
The count timer 136 that outputs the reset command 137b to 6 and the elevator control program are set to a fixed time period (for example, 10
msec) and an interrupt timer 137 for applying an interrupt to the CPU 131, and these are connected to the CPU 131 via a bus 139. Next, the operation of the elevator control device configured as described above will be described with reference to FIG. When the control device 14 is powered on, the program starts (step S1) and then proceeds to the next step S2. Step S2
Then, it is diagnosed whether or not the E ² PROM 133 has an abnormality, and when there is no abnormality, the flag ER is set to “0”. This flag ER is stored in the RAM 134. Then, the process proceeds to the next step S3, and the initial setting necessary for executing the control program governing the operation / management of the elevator is performed. In step S4, the standard minimum control program PRG1 required for controlling the operation and management of the elevator is executed. That is, the control program PRG1 includes a program for calculating a torque command, which is a feedback control amount to the power converter 16 from the reference speed command and the rotation speed of the electric motor 8, and the elevator is driven according to the call of the hall or the car. It is necessary to perform calculations to stop, a program to calculate contactor commands for ON / OFF control of the contactor 17 according to running / stopping, protection of elevator equipment and safety of passengers in the car 10. Safety programs etc. are included. In the next step S5, it is determined whether or not the flag ER is "0". If the flag ER is "0", the process proceeds to step S6, the count timer 137 starts counting, and the next step S7. At, the building-specific program PRG2 stored in the E ² PROM 133 is executed. Then, when the execution of the program PRG2 stored in the E ² PROM 133 is finished, the step
The process moves to S8 and the counting timer 137 stops counting. In step S9, it is determined whether the calculation time by the program of the E ² PROM 133 is within a set value (for example, if the execution time under normal conditions is 4 msec, it is set to 5 msec).
If the calculation time of the E ² PROM 133 is within the set value, the process returns to step S4 and the operations of steps S4 to S8 are repeated. If it is determined in step S9 that the calculation time of the E ² PROM 133 is greater than or equal to the set value, the process proceeds to step S10 and the flag ER
Is set to “1”, and R indicates that E ² PROM133 is abnormal.
Store in AM134. Then, in the next step S11,
The counting timer 137 outputs the interrupt signal 137a to the CPU 131,
This disconnect E ² PROM133 the electrically from CPU131 E ² P
Prevent the ROM133 program from running, and
By outputting the reset signal 137b to the output device 136, the contactor command ON17 ← 0 from the output device 136 is set, and the torque command TRQ ← 0 to the power converter 16 is set. This causes the elevator to stop suddenly. After that, returning to step S3, the elevator is operated and managed only by the control program of the ROM 132. That is, although the operation / management control for each building is disabled, the minimum necessary general service can be provided by the control program of the ROM 132. Therefore, in this embodiment as described above, the E ² PROM 13
If an error occurs in the control program of 3, the CPU 131
ROM 132 that stores the standard control program and speed command data that can be applied to any elevator by electrically disconnecting it from the E ² PROM program
Since the elevator is operated and managed based on the contents of the above, there is no problem that the operation and management of the elevator will be disabled or runaway due to the abnormal program of E ² PROM 133 as in the past. In addition to enabling safe and reliable operation and management, the E ² PROM can be used to store building-specific option programs, and the ROM 132 has standard control programs necessary for elevator operation and management. Since we are trying to store
The capacity of M132 can be reduced and E ² PROM can be used effectively. In the embodiment described above, the case where the E ² PROM is used as the memory storing the building-specific option program has been described. CPU
It may be a memory that can be written to from. Further, the E ² PROM may store and store a failure diagnosis program and the like not involved in the normal function of the elevator.

【The invention's effect】

As described above, according to the present invention, the control program and the speed command data for the standard operation and management applicable to any elevator are stored in the first storage means such as the ROM, and the building-specific Elevator standard operation such as optional program and failure diagnosis program of
Data not required for management is stored in the second storage means such as E ² PROM, and the program execution time of the second storage means is monitored by the counting timer. When the program execution time exceeds the set time, The execution of the program in the second storage means is stopped and the elevator is operated by the program in the first storage means.
Since it is managed, even if the reliability of the second storage means composed of E ² PROM is low, it is possible to operate and manage the elevator with safety and reliability, and to create an empty area for E ² PROM. It can be effectively used without any problems, and the capacity and cost of the first storage means composed of ROM can be reduced.

[Brief description of drawings]

FIG. 1 is a basic configuration block diagram showing an embodiment of an elevator control device according to the present invention, and FIG. 2 is a schematic configuration diagram of an elevator to which the elevator control device according to the present invention is applied,
FIG. 3 is a flow chart for explaining the operation of the elevator control apparatus in this embodiment, and FIG. 4 is a block diagram showing the basic configuration of a conventional elevator control apparatus. 7 ... sieve, 8 ... motor, 10 ... car, 11 ... balance weight, 12 ... pulse generator, 13 ... counter circuit,
14 …… Elevator control device, 16 …… Power converter, 17 ……
Contactor, 131 ... CPU, 132 ... ROM (first storage means), 133 ... E ² PROM (second storage means), 134 ... RA
M, 135 ... input device, 136 ... output device, 137 ... counting timer, 138 ... interrupt timer means. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A central processing unit that controls the whole and executes a given task in an elevator control device that controls the operation and management of an elevator that serves a plurality of floors,
A first memory that stores a control program for standard operation and management and data such as speed commands that can be applied to any elevator required to run or stop the elevator according to a hall call or a car call Means, a building-specific option program and a failure diagnosis program, and the like, and a second storage means in which data can be written from the central processing unit, and the program execution time by the central processing unit of the second storage means is measured. A timer means is provided, and when the measured value of the timer means exceeds a set time, the program execution of the second storage means is stopped and the elevator is operated and managed only by the control program of the first storage means. Elevator control device characterized by the above.