JPH05330749A - Elevator display device - Google Patents

Abstract

PURPOSE:To provide an elevator display device which can prevent flickering from being generated in a digital indicator while the digital indicator at a sub station is being dynamically-driven by serial transmission from a main station, and can make a reply data fetch cycle by the main station from the sub station constant. CONSTITUTION:The initial value of a timer is set at a cycle where transmitted data are outputted from a main station to wait for interrupt, however, in steps S20, S21, serial transmission data processing is carried out, provided that the transmitted data from the main station of serial transmission exist, because the timer is stopped, so that no timer interrupt is generated. Since reply processing is carried out at a step 22, time lag becomes constant to the transmitted data from the main station. In steps S23-S27, a row of LEDs in a digital indicator are dynamically-driven in order. At the timing when the row of LEDs in the digital indicator are dynamically-driven in order, the timing when the sub station receives the transmitted data of the main station is used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a display device for an elevator, and more particularly to a dynamic driving technique for an indicator composed of an LED matrix.

[0002]

2. Description of the Related Art Conventionally, an elevator signal transmission device has been proposed in Japanese Patent Application Laid-Open No. 1-226685. The publication technique is described as performing half-duplex transmission, and an analog indicator is also used as an indicator for an elevator. However, in reality, full-duplex transmission is used because of problems such as transmission delay, and in recent years, digital indicators have also been used.

FIG. 5 shows these configurations. In the figure, 1 is a control panel provided in a machine room, 2 is a microcomputer with a built-in serial transmission interface UART, which serves as a master station for hall transmission (hereinafter, abbreviated as master hall for hall), 3 is serial transmission A microcomputer having a built-in interface UART, which serves as a master station for car transmission (hereinafter, abbreviated as a car master station, and a car master station and a landing master station are collectively referred to as a master station).

Reference numeral 4 denotes a microcomputer provided in the hall (hereinafter, abbreviated as a child station in the hall), to which a digital indicator 5, a call button lamp 6, a call button 7, etc. are connected to control them. There is. The distinction between UP / DOWN is omitted. 8 is a car, 9 is a microcomputer provided in the car 8 (hereinafter, abbreviated as a child station of the car. Also, the child station of the landing and the child station of the car are collectively referred to as a child station),
It controls the car operation panel 10, the car digital indicator 11 and the like.

Further, 12 is the transmission line of the master station of the hall, 13 is the reception line of the master station of the hall, 14 is the transmission line of the master station of the car, and 15 is
It is the receiving line of the master station of the basket.

FIG. 6 is a transmission diagram in the signal transmission device for the elevator shown in FIG. In the figure, the upper part shows transmission data from the master station to the slave station, and the lower part shows reply data from the slave station to the master station. Circles A to D are times when there is no transmission data inserted by the master station in order to establish transmission synchronization between the master station and the slave station, and the slave station detects this and establishes transmission synchronization with the master station. D1 to D16 are transmission line data of the master station, and circles 1 to 16 are reply data of the slave stations.

Further, a dynamic driving method of the dot type digital indicator is proposed in Japanese Patent Laid-Open No. 63-3477. In the technique of this publication, a method of driving and controlling an LED by hardware is proposed, but in recent years, due to the cost reduction of a microcomputer,
As shown in FIG. 7, it has become possible to drive and control the LED dots directly from the microcomputer. FIG. 7 shows an example of control by the slave station 4 in the hall. In FIG. 7, 16
Is a transmission interface circuit, and 17 and 18 are a driver A for driving a data line for driving the LED 19 of the dot type digital indicator 5 and a driver B for driving a common line, and the outputs are negative logic.

8 to 10 are flowcharts of programs incorporated in the slave station 4 in the hall. FIG. 8 is a main sentence, FIG. 9 is an interrupt process for serial transmission, and FIG. 10 is a slave station 4.
This is the interrupt processing of the timer built in the above, and shows only the portion related to the driving of the dot type digital indicator 5. Further, the same circuit configuration and processing are performed for the child station 9 of the car.

Here, in FIG. 7, a font data table of address pair data is written in advance in a built-in ROM (not shown) of the slave station 4, and a display command is received via the interface circuit 16 by the transmission line of the master station. It is designed to be converted into a table address.

For example, if the display command is "1", the address (Hex) and data (Bin) of the font data for displaying "1" in the font data table are the address (Hex) data (Bin) 0100 00000000. Since it is set to 0101 01000010 0102 01111111 0103 01000000 0104 00000000, the start address is "0100", and the internal address is incremented each time the timer count is completed and the font data is output in sequence every time the timer count is completed.

That is, the addresses "0100" to "01"
To display "1" using 04 ", the address" 0 "
Cyclic P2 data from 100 "to" 0104 "
Must output to port. Here, "010
The first "010" of "0" indicates the display code of "1",
The subsequent "0" is created using the font data address pointer. That is, in FIG. 8, x is an address pointer, and an initial value 1 is set (S1, S
2) After that, the timer is started and the interrupt routine is executed each time the count is completed (S3 to S6).

In the timer interrupt processing shown in FIG.
The Xth column lighting data of the LED 19, that is, the data of the address indicating "010x" is output to the P2 port (S1
1), the H level is output to the xth bit of P1 (S1
2). Then, x is incremented (S13), x =
Numbers 5 and above are not in the font data address, so x =
When it becomes 5, x ← 0 is set, the pointer x is returned to 0, and the process returns to the main sentence (S14, S15).

Further, in the serial transmission interrupt processing shown in FIG. 10, after the serial transmission data processing such as reception of the indicator display code is executed, the reply processing is executed (S2).
1, S22) and returns to the main sentence shown in FIG.

[0014]

Since the conventional elevator display device is constructed as described above, the slave station 4 in the hall and the slave station 9 in the car are interrupted by serial transmission and built in the station itself. Two interrupts, the timer interrupt, will be generated. The priority when the two interrupts occur at the same time is that the interrupt by the timer has the highest priority because flickering occurs in the display of the digital indicator 5 when the timing of the dynamic drive varies.

However, if the timer interrupt is given the highest priority, the reply to the master stations 2 and 3 of the hall and the car (circle 1 to circle 16 in FIG. 6) is inevitably delayed by the time for performing the timer interrupt processing. Further, the delay time varies depending on the routine through which the timer interrupt process passes.

As a result, the master stations 2 and 3 become the slave stations 5 and 1.
It is not possible to fix the timing of receiving the reply from 1, which causes the programs of the master stations 2 and 3 to be complicated. If the receiving timing is fixed, it becomes unclear which transmission data is returned. Redundant bits other than the data part are also provided for reply data, and
There has been a problem that it is necessary to clarify the order of the transmission data from the master station to be returned, and as a result, the number of bits of the response data is reduced.

The present invention has been made in order to solve the above-mentioned problems, and when the digital indicator of the slave station is dynamically driven by the serial transmission from the master station, the digital indicator does not flicker. It is an object of the present invention to obtain an elevator display device in which a cycle of fetching reply data from a parent station is constant.

[0018]

A display device for an elevator according to claim 1 of the present invention comprises a microcomputer as a master station for signal transmission in a control panel of a machine room, and signal transmission to each hall and a car. In the elevator display device having a microcomputer as a slave station, performing serial signal transmission between the master station and the slave station, and at each hall and car, a digital indicator controlled by the slave station and dynamically driven, A means for using the transmission timing from the master station of the serial transmission is provided for the dynamic drive timing of the digital indicator.

Further, an elevator display device according to a second aspect of the present invention includes a microcomputer as a master station for signal transmission in a control panel of a machine room, and a timer as a slave station for signal transmission at each hall and car. In a display device of an elevator, which comprises a microcomputer having, performs serial signal transmission between a master station and a slave station, and has a digital indicator controlled by the slave station and dynamically driven in each hall and car, The dynamic drive timing is provided with means for using the timing generated by the timer provided in the slave station during the period when there is no transmission from the master station.

[0020]

According to the first aspect of the present invention, the data transmission timing of the master station is used as the timing for sequentially dynamically driving the LED array of the digital indicator.

In the second aspect of the invention, the timing for dynamically driving the digital indicator is generated by the timer built in the slave station when there is no transmission data from the master station.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the present invention, the hardware configuration is exactly the same as the conventional example. However, the processing at the slave station is different. FIG. 1 is a flow chart showing an interrupt process of serial transmission of a program incorporated in a slave station in one embodiment of the present invention. The main sentence and the interrupt process of a timer incorporated in the slave station are the same as those in FIGS. 6 and 7. ..

First, step S3 of the main sentence shown in FIG.
In, the initial value of the timer is set to the cycle at which the transmission data is output from the master station. And, while waiting for an interrupt,
In steps S20 and S21 in FIG. 1, if there is transmission data from the master station for serial transmission because the timer is stopped, the serial transmission data is processed based on this, and the timer interrupt does not occur. Furthermore, since the reply process is performed in the part of step S22, the delay time becomes constant with respect to the transmission data from the master station.

Then, steps S23 to S27 are processes for dynamically driving the LED string of the digital indicator sequentially, and the timing for dynamically driving the LED string of the digital indicator is such that the slave station receives the transmission data of the master station. It will be.

Also in the timer interrupt process of FIG. 7, since the process of dynamically driving the LED column of the digital indicator is sequentially performed in steps S11 to S15, the indicator flickers even when there is no transmission data from the master station. Therefore, the LED array of the indicators can be sequentially and dynamically driven at a constant cycle so that the above problem does not occur.

FIG. 2 is a timing chart showing the timing of serial transmission and the timing of sequentially dynamically driving the LED column of the digital indicator, and shows the case where "1" is displayed on the digital indicator. That is, when the transmission data from the master station is being received, the reception timing is used as a timing for dynamically driving, and at timings 25 and 26, since there is no transmission data from the master station, the timer interrupt of the own station is used. Generating timing.

[0027]

As described above, according to claim 1 of the present invention, the slave station uses the timing at which the slave station receives the transmission data of the master station as the timing for sequentially dynamically driving the LED rows of the digital indicator. I configured it, so
Flicker does not occur in the digital indicator and the delay time of reply can be made constant, and the master station can fix the timing to receive the reply from the slave station,
Therefore, the program of the master station can be prevented from becoming complicated, redundant bits other than the data part of the reply data are unnecessary, and the transmission efficiency can be improved.

Further, according to the second aspect, since the timer built in the slave station is used to generate the timing for dynamically driving, the same effect as described above can be obtained even when there is no transmission data from the master station. Can be expected.

[Brief description of drawings]

FIG. 1 is a flowchart of a program showing serial transmission interrupt processing in an elevator display device according to an embodiment of the present invention.

FIG. 2 is a timing chart of serial transmission and dynamic driving of a digital indicator in an elevator display device according to an embodiment of the present invention.

FIG. 3 is a block diagram showing a signal transmission device of an elevator.

FIG. 4 is a diagram of a transmission in a signal transmission device of an elevator.

FIG. 5 is a block diagram showing a display device of an elevator.

FIG. 6 is a flowchart showing a main sentence of program processing in a conventional elevator display device.

FIG. 7 is a flow chart of a program showing interrupt processing of serial transmission in a conventional elevator display device.

FIG. 8 is a flowchart of a program showing timer interrupt processing in a conventional elevator display device.

[Explanation of symbols]

 1 control panel 2,3 microcomputer serving as a master station for transmission 4,9 microcomputer serving as a slave station for transmission 5,11 dynamic drive display device

[Procedure amendment]

[Submission date] November 2, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

FIG. 3 shows these configurations. In the figure, 1 is a control panel provided in a machine room, 2 is a microcomputer with a built-in serial transmission interface UART, which serves as a master station for hall transmission (hereinafter, abbreviated as master hall for hall), 3 is serial transmission A microcomputer having a built-in interface UART, which serves as a master station for car transmission (hereinafter, abbreviated as a car master station, and a car master station and a landing master station are collectively referred to as a master station).

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

FIG . 4 is a transmission diagram in the elevator signal transmission device shown in FIG. In the figure, the upper part shows transmission data from the master station to the slave station, and the lower part shows reply data from the slave station to the master station. Circles A to D are times when there is no transmission data inserted by the master station in order to establish transmission synchronization between the master station and the slave station, and the slave station detects this and establishes transmission synchronization with the master station. D1~D16 the feeding of the master station Shinde over data, round 1 to round 1
Reference numeral 6 is the reply data of the slave station.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

Further, a dynamic driving method of the dot type digital indicator is proposed in Japanese Patent Laid-Open No. 63-3477. In the technique of this publication, a method of driving and controlling an LED by hardware is proposed, but in recent years, due to the cost reduction of a microcomputer,
As shown in FIG. 5 , it has become possible to drive and control the LED dots directly from the microcomputer. FIG. 5 shows an example of control by the slave station 4 in the hall. In FIG. 5 , 16
Is a transmission interface circuit, and 17 and 18 are a driver A for driving a data line for driving the LED 19 of the dot type digital indicator 5 and a driver B for driving a common line, and the outputs are negative logic.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

6 to 8 are flowcharts of programs installed in the child station 4 of the hall, and FIG.
Sentence, Figure 7 shows the interrupt processing of the timer built in slave station 4,
Reference numeral 8 is an interrupt process of serial transmission, and shows only a part related to driving of the dot type digital indicator 5. Further, the same circuit configuration and processing are performed for the child station 9 of the car.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

In FIG. 5 , a font data table of address pair data is written in advance in a built-in ROM (not shown) of the slave station 4, and a display command is received via the interface circuit 16 by the transmission line of the master station. It is designed to be converted into a table address.

[Procedure Amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

That is, the addresses "0100" to "01"
To display "1" using 04 ", the address" 0 "
Cyclic P2 data from 100 "to" 0104 "
Must output to port. Here, "010
The first "010" of "0" indicates the display code of "1",
The subsequent "0" is created using the font data address pointer. That is, in FIG. 6 , x is an address pointer, and an initial value 0 is set (S1) . After that, the timer is started, and the timer and the serial transmission interrupt.
And wait for an interrupt to occur (S2-S
6) .

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

In the timer interrupt processing shown in FIG . 7 ,
Lighting data of the Xth column of the LED 19, that is, the address "01
0x " data is output to the P2 port (S11) and P1
The H level is output to the x-th bit of (S12). Then, x is incremented (S13), and since a numerical value of x = 5 or more is not in the font data address, x ← 0 is set when x = 5, the pointer x is reset to 0, and the process returns to the main sentence (S14, S15).

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

Further, in the serial transmission interrupt processing shown in FIG. 8 , after the serial transmission data processing such as reception of the indicator display code is executed, the reply processing is executed (S2).
1, S22), the process returns to the main sentence shown in FIG.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction content]

However, if the interrupt by the timer is given the highest priority, the reply (circle 1 to circle 16 in FIG. 4 ) to the master stations 2 and 3 of the hall or the car inevitably is delayed by the time for performing the timer interrupt processing. Further, the delay time varies depending on the routine through which the timer interrupt process passes.

[Procedure Amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

As a result, the master stations 2 and 3 are transferred to the slave stations 4 and 9.
It is not possible to fix the timing of receiving a reply from the server, which causes the programs of the master stations 2 and 3 to be complicated. If the timing of receiving the reply is fixed, it will not be clear which transmission data is to be sent back. It is necessary to provide redundant bits in the data other than the data part, and to clarify the order of the transmission data sent from the master station by the reply number, etc., and as a result, the number of bits of the reply data decreases. There were problems such as being lost.

[Procedure Amendment 11]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

FIG. 7 is a timer allocation in a conventional elevator display device.
It is a flow chart of a program which shows a re-entry process .

[Procedure Amendment 12]

[Document name to be amended] Statement

[Correction target item name] Figure 8

[Correction method] Change

[Correction content]

FIG. 8: Serial transmission in a conventional elevator display device
5 is a flowchart of a program showing the interrupt processing of FIG.

Claims (2)

[Claims] 1. A control panel in a machine room is provided with a microcomputer serving as a master station for signal transmission, and each hall and a car is provided with a microcomputer serving as a slave station for signal transmission, and the master station and slave stations are provided with serial signals. In a display device of an elevator that is provided with a digital indicator that performs transmission and is dynamically driven in each hall and car at each hall and car, at the dynamic drive timing of the digital indicator, the transmission from the master station of the serial transmission is performed. An elevator display device comprising means for using timing. 2. A master station and a slave station are provided with a microcomputer as a master station for signal transmission in a control panel of a machine room, and a microcomputer having a timer as a slave station for signal transmission at each hall and car. With serial signal transmission,
In an elevator display device having a digital indicator controlled by the slave station and dynamically driven in each hall and car, the slave station has a period when there is no transmission from the master station at the dynamic drive timing of the digital indicator. A display device for an elevator, comprising means for using the timing generated by a timer.