JPH04133983A - Controller for elevator - Google Patents

Abstract

PURPOSE:To certainly store the final stopping position of an elevator cage by reading the final stopping position by a counter means by means of back-up of a second power supply until the elevator cage slightly moved after service interruption reaches the final stopping position. CONSTITUTION:In occurrence of service interruption, an output voltage from a stabilized power supply 41 is immediately dropped, which is detected by an service interruption detecting circuit 23. Thus the time counter data in a RAM 13 is changed. Also, even when the output voltage from the stabilized power supply 41 is dropped, power feed is continued from a non-service interruption stabilized power supply 43 to a computer circuit 10 through a contact 22a and a diode 44, and accordingly, the activation of the computer circuit 10 is kept in a normal state. As the time count reaches a specified value the output from a cage position counter 21 is read through an input circuit 15 and written in a specified address of a nonvolatile memory 16 thus performing the de- energization of a power supply relay 22. Therefore, the contact 22a is opened, thereby cutting-off the power feed from the non-service interruption stabilized power supply 43 to the computer circuit 10.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an elevator control device that digitally detects the position of a car and is controlled by this detection signal, and more specifically relates to an elevator control device that digitally detects the position of a car and is controlled by this detection signal. The present invention relates to an elevator control device equipped with a position detection device that is equipped with a power supply device, accurately memorizes the car position, and immediately resumes normal operation when the power supply is restored to normal.

[Prior Art] Generally, in an elevator control device, when a power failure such as a power outage occurs, the control device enters a non-stop state.
Although the elevator stops immediately, it takes some time for the car to come to a complete stop. It is necessary to accurately detect and memorize the location of the object. In addition, elevators in general office buildings, etc. may turn off the power for a long time to save electricity during New Year's holidays and other times, and the car position detection device accurately determines the car position during the time when the power is cut off. Need to remember.

As an example of such an elevator control device, there is an invention disclosed in Japanese Patent Laid-Open Publication No. 53-73756.

This invention relatively detects the amount of movement of a car and uses it as a position signal of the car, and in an elevator controlled by this position signal, a first power supply device and the functions of this power supply device are disabled due to a power outage or abnormal power supply. A detection device is provided to detect when the car has stopped, and the above-mentioned car position signal is stored electrically so that the function of the car position detection device operates normally even after a power outage, etc. until the car completely stops. Therefore, a second power supply device is provided to supply power, and a third power supply device is provided to supply power only to the position signal storage circuit in the car position detection device even after the function of the second power supply device stops. The elevator is equipped with a power supply device that accurately remembers the final stop position of the elevator in the event of a power outage, etc., so that normal operation can be resumed immediately after the power outage returns to normal.

[Problems to be Solved by the Invention] However, in the elevator control device as described above, after the function of the first power supply device stops suddenly due to stoppage, etc., for example, when the elevator car is raised and lowered at a boom/min. Even in this case, it will come to a complete stop in just a few tens of seconds, and the final stop position will be detected during these tens of seconds by power supply from the second power source.

On the other hand, the power supply time from the third power supply device is not as short as the power supply time from the second power supply device described above (for example, during holidays from the end of the year to the beginning of the new year, or during holidays, there will be a long-term power outage, During this period, it is necessary to maintain a memory of the final parking position of the car. Therefore, the third power supply is several times larger than the second power supply. Alternatively, the third power supply may be a battery-based mechanism. However, since a large-capacity battery is required, and a power supply switching circuit and the like are added, there are problems such as a complicated configuration and high costs.

This invention was made to solve the above-mentioned problems, and it is possible to reliably memorize the final stop position of a car over a long period of time, such as during a power outage, without having to install a large and large-capacity third power source. The purpose is to obtain an elevator control device that can

[Means for Solving the Problems] An elevator control device according to the present invention includes a second power supply device for backup in case of a power outage of the AC power supply that supplies power to the control device, etc., and a second power supply device for backup. A counting means for reading the position of an elevator car that has stopped due to a power outage within a predetermined power supply time of the device, a non-volatile memory that stores the position of the elevator car that has stopped based on the output of the counting means, and a second memory after storing the non-volatile memory. The elevator car is equipped with memory control means that cuts off the power supply from the second power supply device and presets the stop position of the elevator car when the AC power supply is restored.

[Function] In the present invention, the AC power source remains in the second position until the elevator car reaches its final stop position, which moves slightly after a power outage.
'FT4 If the device backs up the final stop position, the final stop position is read and stored in non-volatile memory, and when this storage is done, the power supply from the second power supply is immediately cut off, and the AC power supply is turned off. After the return, the elevator starts operating from the preset final stop position of the car.

Embodiment FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In the figure, (10) is a computer circuit, which includes a central processing circuit (hereinafter referred to as CPU) (11),
A ROM (12) that stores programs and preset data for operating the U (II), and a RAM (+3) that temporarily stores data processed by the CPU (11). and CPU (I
an output circuit (14) that outputs control signals emitted from the CPU (14) to an external circuit;
1) and the input circuit (+5) to be imported into the CPU (If
), specific data can be written to it according to instructions from the CPU (II), and it continues to be stored even when the power is cut off, and can be read out by the CPU (hereinafter referred to as E2FROM).
) (1B) and a bus signal line (17) that connects them.

(20) is a pulse generator that emits a pulse signal in response to the elevator car going up and down, and (21) is a car position counter that counts the pulse signal and outputs a car direct signal. ).

Further, the preset input is connected to an output circuit (14).

(30) is an external circuit for controlling the elevator, which receives a command signal (t4a) from the computer circuit (10) and outputs the command signal (t4a) from the computer circuit (10) as an external signal (80a).
).

(41) is a stabilized power supply that converts the output of the AC power supply (40) into DC and supplies DC power to the elevator control circuit. ), and a diode (
42).

43〉 is an uninterruptible stabilized power supply equipped with a battery and a trickle charging circuit, and its output is connected to the power supply control relay (22
) is connected to the elevator control internal circuit (50) via the contact (22a) of When this happens, this is detected and taken into the computer circuit (10) via the input circuit (15).

Next, the operation of the present invention configured as described above will be explained with reference to the second flowchart. ROM (12)
When power is supplied from the AC power supply (40) according to a program written in advance in the computer, power supply to the computer circuit (10) is started from the stabilized power supply (41) via the diode (42), and the process proceeds to step 101.

In step 101, when CPU (1, 1) executes data initialization necessary for calculation, step 10 is executed.
2, where the car position data stored in the predetermined address of the E2PROM (1B) is transferred to the output circuit (14).
After that, the car position counter (21) is preset, and the steps from step 103 onward are repeated.

In step 103, the output value of the car position counter (21) is passed through the input circuit (15) to the computer circuit (1).
0), and in the next step 104, the elevator operation is controlled according to the output value of the car position counter (21),
That is, a program for controlling the external elevator control circuit (30) such as call registration, speed command generation, and stop control is executed. Also, if the car position counter (21) has been preset in step 102, or if the absolute position point of the hoistway has been detected by the elevator control external circuit (30), this position is given priority and re-preset. Position correction operations such as straightening are also performed in step 104.

Next, the process proceeds to step +05, where the power outage detection circuit (23) checks the output voltage of the stabilized power supply (41) and determines whether it is below a predetermined value, that is, whether a power outage has been detected.If no power outage is detected, In step 107, RAM (13
) is reset, and in the next step 111, the power control relay (22) is driven by the output from the output circuit (14). As a result, the contact (22a)
is closed and the uninterruptible stabilized power supply (43) is connected to the diode (4
4) to the elevator control internal circuit (50).

If the AC power source (40) is normal, repeat the above steps, but if a power outage occurs, the stabilized power source (41)
The output voltage of the power outage detection circuit (23) begins to drop immediately.
detects this, step 105 resteps 1
(Proceeds to step 16, and the time count data in RAM (13) is updated.Also, even if the output voltage of the stabilized power supply (41) decreases, the contact (
22a) and the diode (44), the computer circuit (10) continues to operate normally. Then, the process proceeds from step 105 to step Ill until the time count value reaches a predetermined value, but when the time count value reaches the predetermined value, step 109
In step 110, the output value of the car position counter (21) is read through the input circuit (15) and written to a predetermined location in the E2FROM (1B), and in the next step 110, the power control relay (22) is deenergized. Therefore, the contact (22a) is opened and the power supply from the uninterruptible stabilized power supply (43) to the computer circuit (10) is cut off.

Next, when the power is restored, the first step 101゜10
In step 2, the car position data stored in the E2FROM (113) is re-reset in the car position counter (21), and the elevator can be operated normally from the next step 103 onwards.

In the above embodiment, a case has been described in which the elapse of a predetermined period of time after the occurrence of a power outage is detected and the power supply is controlled from the uninterruptible stabilized power supply (43), but the output value of the car position counter (21) is checked. , if the output value does not change for a predetermined period of time, the output value of the car position counter (21) is transferred to E2 FROM (
1B) and memorize it, and then the power supply from the uninterruptible stabilized power supply (43) is cut off, the same effect as in the above embodiment can be obtained.

[Effects of the Invention] As described above, according to the present invention, an uninterruptible stable power supply (second power supply device) that supplies power to the elevator control internal circuit within a predetermined time after a power outage is provided, and the car A car position counter is installed that monitors and backs up the movement and reads the position of the car that stops after a predetermined period of time has elapsed, and stores this read position in a predetermined location of non-volatile memory (E2FROM) provided in the computer circuit. Since the configuration is such that the power supply from the above-mentioned uninterruptible stable power supply is cut off after the power is turned off, the backup power supply 82 in the event of a power outage only needs to be supplied for a short period of time from the start of the power outage until the car completely stops. Since there is no need for a large-capacity backup power supply device to memorize the stop position of the car over a long period of time, such as when the car is connected, a significant cost reduction can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.
FIG. 2 is a flowchart for explaining the invention in detail. In the figure, (10) is a computer circuit, (IG) is a non-volatile memory (E2FROM), (20) is a pulse generator, (21> is a car position counter (counting means), (
40) is an AC power supply, (43) is an uninterruptible stabilized power supply (second
power supply). Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] In an elevator control device that controls the raising/lowering, starting, stopping, etc. of an elevator car by supplying power from an AC power supply, a second backup control device for supplying power to a computer circuit, etc. immediately after a power outage of the AC power supply is provided. a power supply device; a counting means for reading the stop position of the elevator car within a predetermined power supply time by the second power supply device; non-volatile memory to store data in;
It is characterized by comprising memory control means for cutting off the power supply from the second power supply device after storing in the nonvolatile memory, and further presetting the stop position of the elevator car in the counting means after the AC power is restored. Elevator control device.