JPS59124666A - Method of controlling group of elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an elevator group management control method for controlling a plurality of elevators, and in particular to improving reliability against troubles related to transmission between control devices. be.

[Technical background of the invention]

Elevator group management control is performed to efficiently operate multiple elevators installed in parallel. The group management control device selects an appropriate elevator for a generated hall call based on information on each elevator under group control, and assigns an output to that elevator. Upon receiving this signal, the elevator selects a hall call direction based on this hall call assignment.

In such group control elevator systems, control systems that incorporate electronic computers have become common in recent years.
The group control device that is in charge of group management control and the individual control device of each elevator are each equipped with an electronic computer, and between each control device, parallel data transmission is performed on a time-sharing basis via a limited number of transmission signal lines. 1], or by a serial transmission method.

Therefore, compared to conventional systems that handle level signals one-to-one for signal lines, it is difficult to visually detect the cause of an abnormality, and if a failure occurs in the transmission system, Even if each control device alone is normal, the control signal from the group control device, the information for each elevator from the individual control device of each elevator, etc. all become abnormal, causing the entire group control system to suffer a major failure, and the system This may result in a significant decrease in efficiency. In addition, if there is a poor contact in the connector for wiring between each control device or a failure in a part of the transmission signal line, an abnormality will occur in only some bits, making it very difficult to detect the failure. There is also the problem.

[Purpose of the invention]

An object of the present invention is to provide a group management control method for elevators in a group management control system, which enables transmission system management and efficient check-up in response to abnormalities, and improves system reliability. .

[Summary of the Invention] The present invention sets a transmission test code in the transmission signal between the group control device and the individual control devices, periodically manages the exchange of signal data, and when an abnormality is detected, each individual control device independently The feature is that it responds to calls.

[Embodiments of the invention]

FIG. 1 shows the system configuration of a group control elevator system according to an embodiment of the present invention.

Here, for convenience of explanation, the number of group control bases is assumed to be three, number A to number C.

Reference numeral 1 denotes a hall call registration deletion circuit, which is constructed using a logic circuit such as a flip-flop. This hall call registration deletion circuit operates the hall call button (
When a switch) is pressed, a signal is input to a set terminal of a flip-flop, for example, and latched. The latched signal is transmitted from the output terminal to the group management device 2 via the multi-signal line L2. The signal is transmitted to each individual control device 3a to 3c and drives the hall call lamp. When the elevator responds to the hall call, a cancellation signal is transmitted from the individual control device (any one of 3a to 3c) corresponding to the responding car via the multi-signal line L2, and is input to the reset terminal of the flip-flop. This releases the latch and clears the hall call registration.

2 is the group control unit, which mainly consists of an electronic computer such as a microcomputer, and details include a central processing unit, an interrupt control management unit, a VO (input/output) interface unit, etc. When this occurs, a hall call signal is input via signal line L2,
The information of each elevator is inputted to the individual control devices 3a to 3c via the transmission line L1, and based on that information, the optimum car for the hall call is selected, and the elevator is sent to the corresponding car via the transmission line L1. The assignment transmits signals in the form of control signals to its individual control devices.

The output signal line REQ of the group control device 2 and the output signal line ACK of each individual control device 3a to 3c are connected to the group management control device 2.
This is an interrupt control signal for controlling transmission between the group management control device 2 and each individual control device 3a to 3C. The interrupt control signal ACK for the request is input to the interrupt control management section of the computer of each individual control device #38 to #3c and the group control device 2, respectively, and is sent to the group management control device 2. It recognizes that there is a request for a transmission signal from each of the individual control devices 3a to 3c, and inputs data via the transmission signal line L1.

5LCLA-5LCLC, which is the output signal from the group control device 2 to each individual control device 3a to 3c, is a control signal line for single-car operation command, and is installed in a separate system from the transmission signal line L. However, for some reason, the interrupt control signal lines REQ and ACK and the transmission line L, which are the transmission system between the group management control device 2 and the individual control devices 3a to 3c, and the electronic computers of the individual control devices 3a to 3c are damaged. When a transmission abnormality occurs, each individual control device 3a to 3c is separated from group management control and single car operation is commanded.

Next, regarding the operation in the above-mentioned configuration, Figure 2~
This will be explained in detail with reference to the flowchart in FIG.

FIG. 2 is a flowchart showing part of the operation of the electronic computer of the group control device 2, and is a routine for managing the state of the transmission system between the group control device 2 and each individual control device 3a to 3c. It is activated periodically at fixed time intervals by a timer interrupt, etc. In addition, FIG. 3 shows each individual control device 3a to
3c is a flowchart showing part of the operation of the electronic computer 3c, and the processing of the group control device 2 of the group control device 2 and each of the individual control devices 38 to 3c. This routine is activated when a transmission test code is transmitted from the group control device 2. - As shown in FIG. 2, this routine is activated in the group control device 2 to periodically perform a transmission test at fixed time intervals to check whether the transmission system is normal. First, it outputs the transmission test code and request data, and then waits for a certain period of time until it receives a response.

The counter CTI is a counter for managing the time until a response. If there is no response within a certain period of time LIM 1, the process proceeds to connector A2, and the counter CT2 monitors an abnormal state in which there is no response, and returns a certain number of times LIM 2. As mentioned above, if the above-mentioned abnormal condition continues, it will be determined that there is a transmission abnormality, and the unit will be disconnected from the group management control at connector A8, and the individual control unit Ja-
30 is ordered to drive one car alone. The above fixed time LIM
If there is a response within 1, the data requested by the group control device 2 is compared with the data transferred from each of the individual control devices 3a to 3c. As shown in the processing routine for the transmission test code of each individual control device 3a to 3c in FIG. 3, when the transmission test code is output from the group control device 2, the requested data is read and Since a processing routine for retransferring data to the group control device 2 is performed in each individual control device 3a to 3c, if normal, the requested data and the retransferred data are equal. The data is verified, and if it is normal, the requested data is updated, and then this routine waits until the transmission test code and requested data are output. If a mismatch occurs between the requested data and the transferred data due to some abnormality, the counter CT, ? The system monitors the abnormal state of data matching, and if the above abnormal state continues for a certain number of times LIM 3 or more, it is determined that there is a transmission abnormality, and a car independent operation command is issued to the corresponding car through the connection 8.

FIG. 4 is a flowchart showing another part of the operation of the electronic computers of each of the individual control devices 3a to 3c.
This is a routine that is activated when each individual control device 38 to 3c is instructed to run one car alone. As described above, when a transmission test from the group control device 2 determines that there is a transmission abnormality and a one-car solo operation command is output, the individual control devices 3a to 3c independently transmit hall call information via the signal line L2. The individual control devices 3a to 3c independently operate one car. During normal operation, control is performed in accordance with commands from the group control device 2 under group management control.

It goes without saying that the present invention is not limited to the embodiments described above and shown in the drawings, but can be implemented with various modifications without changing the gist thereof.

〔Effect of the invention〕

According to the present invention, when controlling a group management control elevator system having a group control device that manages a plurality of elevators and an individual control device that controls individual elevators according to commands from the group control device, the group control device By managing the transmission system of the entire system, and when an abnormal condition is detected, the individual controllers are separated from group management control and made to respond to hall calls independently. It is possible to provide an elevator group management control method that can improve reliability and prevent extreme deterioration of service for hall calls.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the system configuration of a system according to an embodiment of the present invention, Fig. 2 is a flowchart showing the operation of the group control device in the embodiment, and Figs. 3 is a flowchart showing the operation of the control device. 1... Hall call registration deletion circuit, 2... Group control device,
3a to 3c...Individual control device, REQ...Interrupt request control line of group control device, ACK...Interrupt request control line of individual control device, Ll...Transmission line, L2...hall call signal Line, 5LCLA-5LCLC...1
Car independent operation command control line. Applicant's representative Patent attorney Takehiko Tsurie Figure 2 Figure 3

Claims (1)

[Scope of Claims] A group control device that manages a plurality of elevators, and an individual control that is provided corresponding to each of the plurality of elevators and that receives commands from the group control device and controls the operation of each individual elevator. In order to control the group control elevator system that centrally controls the plurality of elevators, a test code is set in the transmission signal between the group control device and the individual control devices, and this transmission Periodically conduct transmission tests using test cords to manage the transmission and reception of signal data to the above group control device, and if an abnormal state is detected in the signal data during this transmission test, control each of the above individual control devices in the group. A group management control method for elevators, characterized in that each individual control device is separated from the device and responds to a hall call.