JPS6251866B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an elevator control device.

In recent years, a group control elevator system that incorporates electronic computers has been developed and is now partially in operation. This system can be broadly divided into: memorizing hall calls;
It consists of a group management device that is assigned to each car, and each car control device that receives instructions from the group management device and controls the operation of the cars. Although the group management device and each unit control device are usually constructed from separate electronic computers, it is naturally necessary to send and receive signals between them.

In that case, in order to synchronize the calculation cycles of the programs of both computers, the group control device issues a synchronization signal.
This signal often causes each unit control device to start calculating the program. This is because while there is one group management device, each unit has a plurality of control devices, so it is easier to synchronize if the group management device is the master side.

However, if the above-mentioned synchronization signal is not transmitted to the control device of each car due to a failure of the group control device, all elevators will be unable to run, resulting in great inconvenience to passengers. When an abnormality is detected in the signal, the above-mentioned problem has been solved by allowing each unit control device to perform operations such as responding to each floor in turn, regardless of the presence or absence of a call.

However, if the machine is operated only by the above-mentioned individual control devices, conventionally, a person in charge such as a maintenance person repairs the fault and resumes normal operation.

However, there are two types of data transmission failures, such as failures in the group management equipment, which must be repaired by staff, and those that are temporary, such as those caused by loud noises such as lightning.

In conventional elevator control devices, even if the failure is temporary, the elevator has to wait for the arrival of an attendant, which delays the return to normal operation and causes inconvenience to passengers.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional technology, and when each unit is operated only by the control device due to a failure of the group control device, especially due to a synchronization error,
It is an object of the present invention to provide an elevator control device that can synchronize without problems and automatically return to normal operation when the above-mentioned failure is recovered.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of an elevator control device of the present invention will be described based on the drawings. FIG. 1 is a block diagram showing the configuration of one embodiment. 1 in FIG. 1 is a group management device, and 2 is an individual control device. Although there are actually a plurality of control devices 2 for each unit, they are not shown here.

11 in the group management device 1 and 21 in each unit control device 2 are central processing units (hereinafter referred to as
First, we will discuss the case of the group management device 1. The CPU 11 is adapted to send and receive signals to and from a memory 12, a timer 13, a signal transmission device 14, and an input/output converter 15.

The memory 12 is composed of a read-only memory (ROM) that stores the programs of the CPU 11, and a write-readable memory (RAM) for temporary storage of calculation results.

Further, the input/output converter 15 is an input/output converter composed of a voltage converter and the like for inputting/outputting signals between the CPU 11 and the external device 17, and is generally called an interface. The signal transmission device 14 is for transmitting and receiving signals between the CPUs 11, and is adapted to transmit data between the group management device 1 and each control device 2 via the data transmission line 30. .

In each unit control device 2, the memory 22 is composed of ROM and RAM, similarly to the memory 12, and the input/output converter 25 is connected to the input/output converter 1.
5, it is composed of a voltage converter and the like for inputting and outputting signals between external devices 27. The external devices 17 and 27 are external devices composed of elevator devices, and include a call registration button and the like.

FIG. 2 shows a flowchart for executing a control program for each elevator. The program shown in FIG. 2 is periodically and accurately executed by the timer 23. Normally, this cycle is the same as that of the group management device 1 and is realized by the timer interrupt 34.

A timer interrupt 34 starts the program. Reference numeral 41 is a flag that instructs the elevator to perform backup operation, and is a comparison operation that branches depending on whether this flag is "1" or "0".

When this flag 1 is "1", backup operation is performed in the each-machine control calculation 45, and when flag 1 is "0", normal operation is performed in the above-mentioned each-machine control calculation 45.

Flag 2 is set to ``1'' before the actual calculation 43, and reset to ``0'' at the end 46 of all calculations. That is, in the comparison operation 42, if there is a transmission abnormality such as the synchronization signal not coming, or if the synchronization signal from the group control device 1 no longer comes, the synchronization signal sense operation 36 is performed.
Therefore, in the next timer interrupt 34 calculation, the flag 2 is not reset at 46 in the comparison calculation 42, so it remains at "1". Therefore, flag 2 becomes "1",
Comparison operation 47 and flag set operation 48 are performed as long as the flag 1 reset enable condition is not satisfied.
As a result, flag 1 for backup operation command is set.

Further, 44 is a calculation for transmitting data with the group management device 1, and 45 is a control calculation for each unit.

That is, flag 2 in FIG. 2 is a flag for detecting an abnormality.

Now, 47 in Fig. 2 is a comparison operation that determines whether to set or reset a flag. After flag 1 becomes "1", the elevator runs, then stops, and the flag is set only once when the door is opened. The comparison operation 47 may proceed to operation 49 which resets flag 1 to "0", and otherwise branch to operation 48 which sets flag 1 to "1".

In other words, Fig. 2 shows that when data transmission from the group control device 1 becomes abnormal, this abnormality is detected programmatically, the elevator is put into backup operation, and after the backup operation, when certain conditions are met, backup operation is started. automatically resets the command,
If the synchronization signal from the group control device 1 is detected again and the synchronization signal comes normally, the elevator can automatically return to normal operation again.

Next, when automatically returning to normal operation from backup operation, smoother operation is possible if the return is performed only when certain specific conditions are met. In other words, if you do not limit it to only when specific conditions are met, if the synchronization signal does not come one by one, when you try to return from backup operation, the synchronization signal detection 36 will loop again, and , issues a backup operation command, attempts to return again, loops due to synchronization signal detection 36, and issues a backup operation command.

For this reason, the calculations of the vehicle control calculation 45 are skipped every other time, making it impossible to perform calculations at regular intervals, resulting in problems such as poor riding comfort.

As a condition for returning from this backup operation,
The timing of return is limited so that normal operation can be resumed only when certain conditions are met, and the elevator operates after the means for detecting an abnormality in the signal from the group control device is activated, and then stops.
The above characteristics are utilized in the case of conditions such as when a door is opened or when the elevator does not run for a certain period of time after this detecting means is activated.

As described above, according to the elevator control device of the present invention, the synchronization signal is periodically scanned among the signals from the group control device, and when the synchronization signal is not detected as a result of the scanning, the scan is performed. The operation of each elevator is controlled only by the control device of each elevator, and the synchronous signal is scanned again only when certain conditions are met, and after the synchronous signal is detected, the above Since each elevator is automatically returned to normal operation by the group control device, the group control device and each elevator control device can be synchronized without any problems at the time of return, and the return to normal operation is delayed. This will eliminate problems that cause inconvenience to passengers.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of one embodiment of the elevator control device of the present invention, and FIG. 2 is a program flowchart of the elevator control device in the same elevator control device. 1...Group management device, 2...Each unit control device, 11, 2
1... Central processing unit, 12, 22... Memory, 13,
23...Timer, 14, 24...Signal transmission device, 1
5, 25... Input/output converter, 17, 27... External device, 30... Data transmission line. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1. In an elevator control device that performs elevator control calculations using an electronic computer, a group control device that manages a plurality of elevators, and each unit that controls the operation of the elevators in response to commands from the group control device. The control device periodically scans the synchronization signal among the signals from the group control device, and when the synchronization signal is not detected as a result of scanning, the scanning is stopped and each elevator is operated only by the car control device. In addition, the synchronization signal is scanned again only when certain conditions are met, and after the synchronization signal is detected, each elevator is automatically returned to normal operation by the group control device. An elevator control device comprising a detection means for detecting. 2 Under certain conditions, the elevator is operated by the control device of each car without being able to detect a synchronization signal, and then stops.
2. The elevator control device according to claim 1, wherein the elevator control device operates when the door is opened.