JPH1029773A - Elevator control device - Google Patents

Abstract

[PROBLEMS] To control an input direction of an expansion bus buffer in both input and output directions or an output direction, and to monitor the operation of a microcomputer in the output direction. An elevator control device includes a microcomputer for controlling operation of an elevator, and an expansion bus buffer for inputting and outputting data between the microcomputer and an external bus. Means for controlling the direction in a predetermined direction, so that the input / output direction of the expansion bus buffer can be switched to either the input / output direction or the output direction, or the input / output direction of the expansion bus buffer is set to the output direction. When switching,
The operation of the microcomputer is analyzed by a monitor connected to an external bus.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator control device for controlling the input / output direction of an extended bus buffer provided in an elevator control device, and further controlling the input / output direction of the extended bus buffer in an output direction. Monitoring the operation status of the microcomputer, especially
It is related to the expansion means or the monitor means of the microcomputer of the elevator control device which is convenient when the number of floors of the elevator increases or when an extended printed board is used as a means for increasing the communication line such as communication with the management room. is there.

[0002]

2. Description of the Related Art As a prior art, Japanese Patent Application No. 63-2300
As shown in Japanese Patent Application Laid-Open No. 13-134, there is known a device which enables both input and output when externally extended.

However, in the prior art, a monitor device is connected to an elevator control device to detect the state of a microcomputer incorporated in the elevator control device, that is, data at the time of a read command or write command of the microcomputer. That is not taken into account. Further, there is a device that detects the state of the microcomputer by a monitor device connected via an external expansion bus buffer of the microcomputer, but it can only detect write command data.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, the present invention relates to an elevator control device,
When the expansion bus buffer is connected to the microcomputer provided in the control device of the elevator, it is intended to control so that any data of the read command data and the write command data can be externally output. It is an object of the present invention to monitor the operation state of a microcomputer by outputting data externally by a monitor device connected externally.

[0005]

In order to achieve the above object, the present invention employs the following means.

In an elevator control apparatus provided with a microcomputer for controlling the operation of an elevator and an expansion bus buffer for inputting and outputting data between the microcomputer and an external bus, the input / output direction of the expansion bus buffer A means for controlling the direction of the expansion bus buffer is provided inside or outside the control device of the elevator, and the control means controls the input / output direction of the expansion bus buffer to be switchable between either the input / output direction or the output direction, or When the input / output direction of the extension bus buffer is switched to the output direction, the microcomputer is monitored by a monitor device connected to an external bus.

[0007]

Embodiments of the present invention will be described below.

FIG. 1 is a diagram showing a configuration of an elevator control device according to the present invention.

Reference numeral 1 denotes a printed board for elevator control, which comprises a microcomputer 2, a data bus buffer 3, an address bus buffer 4, a decoding circuit 5, a transmission / reception circuit 6, etc., and a car 10 and a hall 11 via the transmission / reception circuit 6. The exchange of data is performed between and. The microcomputer 2 controls the elevator by registering the call button of the car 10 or the hall 11, and controls the operation of the car to an appropriate floor.

When the number of floors for servicing the elevators increases or when it is necessary to communicate with the control room, an expansion printed board 12 provided with an address bus buffer, a data bus buffer and a transmission / reception circuit is provided. In addition, elevator control is performed between the microcomputer 2 and the additional hall 14 or the management room 15 via the communication lines of the address bus and the data bus.

In such a state, usually, the decoding circuit 5
Is controlled in the data bus buffer 3 so as to be input at the time of a read command and output at the time of a write command. Therefore, when monitoring the states of the data bus and the address bus via the bus buffer in order to detect the operation state of the microcomputer 2 in such a state, only the state at the time of a write instruction can be detected.

Therefore, according to the present invention, a monitor device 13 for monitoring the operation state of the microcomputer 2 is provided.
Is connected to the elevator control printed board 1 via the bus request device 7. A bus request circuit 8 provided in the bus request device 7 is connected to the decoder circuit 5, and a bus buffer of the bus request device 7 is connected to the bus buffers 3, 4 via a data bus and an address bus, respectively.

The decoding circuit 5 is configured to control the input / output direction of the bus buffer 3 in accordance with the instruction of the bus request circuit 8, and in such a state, the microcontroller 5 sends the signal from the bus request circuit 8 to the printed circuit board 1 for elevator control. When a bus request signal is output to detect the operation state of the computer 2, the decoding circuit 5 controls the bus buffer 3 so that the microcomputer 2 outputs data both when a read command and a write command are issued. The operation state of the computer 2 can be detected.

That is, the present invention controls the switching of the input / output direction of the expansion bus buffer 3 of the microcomputer 2 in accordance with an instruction from the bus requesting device 7 to thereby control the expansion printed board 9 or the monitor device 13 or the logic analyzer. It is possible to arbitrarily connect to either side of the external output device.

FIG. 2 shows an embodiment of the decoding circuit 5 used for controlling the input / output direction of the extended bus buffer.

When the microcomputer 2 is connected to the extended printed board 9, the output voltage of the bus request circuit 8 is set to Hig.
Control is performed so that the h level or the bus request circuit 8 is not connected. At this time, the decode circuit 5 controls the data bus buffer 3 so as to be input when a read command is issued and output when a write command is issued, in accordance with a read / write signal from the microcomputer 2. Data transmission and reception are performed between the nine.

On the other hand, when the microcomputer 2 is connected to the monitor device 13 for monitoring, the bus request circuit 8
Is controlled to a low level. At this time,
The decoding circuit 5 is connected to the read /
The write signal is invalidated and the data bus buffer 3 is constantly controlled to the output state. As a result, the operating state of the microcomputer 2 can be confirmed by the monitor device 13 connected to the external bus of the elevator control printed board 1.

FIG. 3 shows a different embodiment of the decoding circuit 5. FIG. 2 determines the input / output direction of the data bus in accordance with the signal of the bus request circuit 8, whereas FIG. Since the changeover switch 14 is provided on the printed circuit board 1, the bus request circuit 8 becomes unnecessary.

As in the case of FIG. 2, when the microcomputer 2 is connected to the extended printed board 9, the changeover switch 14 is controlled to be turned on, and the decode circuit 5
In response to a read / write signal from the microcomputer 2, the data bus buffer 3 is controlled so as to be input when a read command is issued and output when a write command is issued.
And the microcomputer 2 exchange data.

On the other hand, when the microcomputer 2 is connected to the bus request device 7, the changeover switch 14 is controlled to the off state, and the decode circuit 5 invalidates the read / write signal of the microcomputer 2 and disables the data bus buffer 3 Is always output.

FIG. 4 shows another embodiment of the decoding circuit 5, which controls the input / output direction of the extended data bus buffer 3 in accordance with an instruction from the bus request circuit 8, similarly to the decoding circuit 5 shown in FIG. By inputting a signal from the bus request circuit 8 to the address decode circuit, the extended bus buffer 3 can be used in a state where the release area is limited.

[0022]

As described above, according to the present invention, the operation of the microcomputer is easily analyzed by connecting the logic analyzer and the monitor device to the extension bus buffer in the elevator control device provided with the extension bus buffer. This is effective for the development of a control device using a microcomputer and the analysis at the time of failure. Also,
Data during the operation of the elevator can be read to monitor the operating state of the elevator or the operating state of the microcomputer.

[Brief description of the drawings]

FIG. 1 is a diagram showing an entire elevator control device of the present invention.

FIG. 2 is a diagram illustrating an embodiment of a bus buffer control circuit according to the present invention.

FIG. 3 is a diagram showing another embodiment of the control circuit of the bus buffer of the present invention.

FIG. 4 is a diagram showing still another embodiment of the control circuit of the bus buffer of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 elevator control printed board 2 microcomputer 3 data bus buffer 4 address bus buffer 5 decoding circuit 6 transmission / reception circuit 7 bus request device 8 bus request circuit 9 extended printed board 10 car 11 elevator hall 12 elevator management room 13 monitor device 14 switches

Claims (4)

[Claims] An elevator control apparatus comprising: a microcomputer for controlling operation of an elevator; and an expansion bus buffer for inputting and outputting data between the microcomputer and an external bus. An elevator control device comprising means for controlling an output direction in a predetermined direction. 2. The elevator control device according to claim 1, wherein the control means is provided inside or outside the elevator control device. 3. The method according to claim 1, wherein
The elevator control device according to any one of claims 1 to 3, wherein the control means controls the input / output direction of the expansion bus buffer so as to be switchable between either the input / output direction or the output direction. 4. The method according to claim 1, wherein
The elevator according to claim 1, wherein the control unit switches an input / output direction of the extension bus buffer to an output direction, and monitors the microcomputer by a monitor device connected to an external bus. Control device.