JPH0472283A - Signal transmission device for elevator - Google Patents

Abstract

PURPOSE:To surely deliver and receive data in bidirections at a high speed by discriminating a control command and a data in accordance with whether a specific bit in a transmitted data is '1' or '0', and by setting the bit number of the control command in a transmission unit for serial transmission. CONSTITUTION:A data transmission command 11A is delivered while data 12A through 12C are received. This 4 byte data signal is received by the other party, and if the result of addition of four bits D7 to D4 and four bits D3 to D0 of this four byte data in a four bit unit becomes zero, the receiving side delivers a normal receiving command 11B. Further, if the above-mentioned result does not become zero, an abnormal command 11C is delivered. The operation similar to that as mentioned above is carried out for data transmission from a remote station 2 to a main panel 4 or vice versa.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a device for transmitting signals between an elevator and other devices by serial transmission.

[Prior Art] Conventionally, there has been a monitoring device that monitors the car status of an elevator, such as the car position, car driving direction, and failure, and displays the information on a CRT or indicator light in a manager's room, for example, as disclosed in Japanese Patent Application Laid-Open No. 105881/1983.
It is shown in the publication No.

13 to 15 are diagrams in which a conventional elevator signal transmission device is applied to a monitoring device, in which FIG. 13 is an overall configuration diagram, and FIGS. 14 and 15 are explanatory diagrams of signal transmission.

In the figure, (1) is an elevator 5, (2) is a remote station installed in the machine room (3) and connected to each elevator (1), and (4) is a remote station located away from the machine room (3). The main panel is installed in the existing manager's room (5) and is interconnected with the remote station (2) via a transmission line (6) for serial communication. (7) is a CRT connected to the main panel (4).

A conventional elevator signal transmission device is constructed as described above, in which contact signals representing the status of each elevator (1) are taken into the remote station (2), and these signals are transmitted to the remote station (2).
The signal is converted into a serial signal and transmitted via a transmission line (6) to the main panel (4), where it is displayed on the screen of the CRT (7).

Well, if you just want to monitor the elevator.

The data flow to the monitoring equipment is at the remote station (2
) to the main panel (4). That is, as shown in FIG. 14, data is transmitted in the direction in which the input signal (2a) from the remote station (2) is sent to the main panel (5). However, in recent years the demand for monitoring devices has increased, and the number of control signals output to elevators has also increased.
As shown in Figure 5, data transmission in the direction of sending the output signal (5a) from the main panel (5) to the remote station (2) has been added, and bidirectional data exchange has become possible. .

[Problem to be solved by the invention] In the conventional elevator signal transmission device as described above,
Bidirectional data is exchanged between the remote station (2) and the main panel (5), and the elevator
As the number of devices is increasing, traditional serial transmission
There is a problem that there is a delay in displaying the car status.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an elevator signal transmission device that can transmit and receive data in both directions at high speed and reliably.

[Means to solve the problem] An elevator signal transmission device according to the present invention.

The data signal to be transmitted is composed of a control command and data, these specific bits are set to "1" and FO Go, respectively, and the number of bits of the control command is set to the transmission unit of serial transmission.

[Function] In this invention, the specific bits of the data to be transmitted are
Since control commands and data are distinguished by "1" or "0" and the number of bits of control commands is set as the transmission unit of serial transmission, bidirectional transmission and reception of data signals is possible at any time.

[Embodiment] Figures 1 to 12 are diagrams showing an embodiment of the present invention. Figures 1 to 4 are configuration diagrams of transmitted and received data signals, and Figures 5 and 6 are explanatory diagrams of transmission and reception procedures. , FIG. 7 is a block diagram of the transmitting/receiving means, FIGS. 8 and 9 are flowcharts showing the operation of the data distribution means, FIG. 10 is a flowchart showing the operation of the data transmitting means, and FIGS. 11 and 12 are the data distribution means. 5 is a flowchart showing the operation of the receiving means. In addition, the first
Figure 3 is also used in this embodiment.

In Figure 1, (11) and (12) are 1-byte data signals to be transmitted, each consisting of bits D7 to Do.
11) is a control command, (12) is data, bit D7 of control command (11) is set to "1", and data (12) is set to "1".
The D7 bit of 2) is "0", and the two are distinguished. Also, the control command (II) is from bit D6 to
Three bits of D4 indicate the type of command, and bits D3 to
The 4 bits of Do are designed to contain data for detecting errors in a series of data including data (12).

Here, when adding up each of the 4 bits of bits D7 to D4 and bits D3 to DO of all the data to be transmitted, it becomes 0.
Let's enter checksum data that looks like this.

Next, when it is desired to transmit a data signal of a specific address to the other party, the 4-byte data shown in FIG. 2 is transmitted in sequence. That is, first, a data transmission command (IIA) is sent, and data (12A) to (12C) are transmitted. Here, data 1 (12A) is address 1 (12a) and signal 1 (121,), data 2 (1, 2B) is address 2 (12b) and signal 2 (122), and data 3 (
12c) is composed of address 3 (12c). The transmitted data signal is constructed as shown in FIG.

The other party receives this 4-byte data signal, and the 4-byte data includes bits D7 to D4 and bits D3 to Do.
The result of bitwise addition is If so, the receiving side is the fourth one.
Send the normal reception command (IIB) shown in the figure. Further, if the above addition result does not become ◯, an abnormal reception command (IIC) is transmitted.

This transmission/reception procedure is shown in FIG.

Data transmission from the remote station (2) to the main panel (4), and conversely data transmission from the main panel (4) to the remote station (2), is the same. data 3
(12A) to (12C) are transmitted, and the receiving side returns the result of receiving it as a normal reception command (IIB) or an abnormal reception command (IIC). If the normal reception command (IIB) is not returned, the transmitting side retransmits the data signals (IIA) (1, 2A) to (12C).

The above transmission and reception can be performed bidirectionally, and as shown in FIG. 6, transmission and reception can be performed completely asynchronously. That is, during the transmission of data signals (IIA) (12A) to (12C), data signals (IIA) (12A) to (12C) are sent from the other party.
, 2C), data can be sent and received normally.

Next, the operation for realizing this will be explained with reference to FIGS. 7 to 12.

In FIG. 7, (15) is a data distribution means that directly inputs the data signal, judges the received data, and distributes it to the data transmission means (16) and the data reception means (17); 16) executes a procedure for transmitting a data signal to the other party, and data receiving means (17) executes a procedure for receiving a data signal from the other party.

8 and 9 show the operation of the data distribution means (15).

First, in step (21), it is determined whether the data signal can be transmitted to the transmission line (6), and if it is not possible, the process proceeds to reception processing without performing output processing. If transmission is possible, it is determined in step (22) whether there is a request to output a data signal from the data receiving means (17), and if there is an output request, one data is outputted in step (23). If there is no output request, it is determined in step (24) whether there is a request to output a data signal from the data transmitting means (16), and if there is an output request, one data is output in step (25). If there is no output request, the process proceeds to reception processing without performing output processing.

Next, in step (26), it is determined whether a data signal is input from the transmission line (6), and if there is no input, the process ends. If there is an input, it is determined in step (27) whether the input data is a normal reception command (IIB) or an abnormal reception command (IIC) as shown in FIG. Otherwise, in step (29) the data signal is passed to the data receiving means (17).

FIG. 10 shows the operation of the data transmitting means (16).

When there is a data signal to be transmitted, the data signal shown in FIG. 3 is converted into the form shown in FIG. 1 in step (31). In step (32), the data signal is transferred to the data distribution means (1
5) and instructs transmission. Next, step (33)
to determine whether a reply to the transmitted data has been received.

If not received, it is determined in step (34) whether a predetermined time has elapsed, and if not, the process returns to step (33) and waits for the predetermined time to elapse. If it is determined in step (34) that the timeout has occurred, the process returns to step (32) and the data signal is retransmitted. If it is determined in step (33) that there has been a reply, then in step (35) if it is a normal reception command (IIB), it is determined that the data signal has been transmitted normally and the process is terminated. If it is an abnormal reception command (IIC), the process returns to step (32) and the data signal is retransmitted.

11 and 12 show the operation of the data receiving means (17).

In step (41), it is determined whether there is a data signal input from the data distribution means (15), and if there is no input, the process waits until one is present. If there is an input, it is determined whether the data signal received in step (42) is a data transmission command (IIA),
If it is not a data transmission command (IIA), step (
Return to 41). Next, in step (44), data 1 (
12A), and if the received data is a data transmission command (IIA) in step (45), step (
43) to memorize it. Next, in step (44), wait for reception of data 1 (12A), and in step (45), if the received data is a data transmission command (IIA),
Data transmission command (IIA) is issued again due to some trouble.
It is determined that the data has been received, and the process returns to step (43) to store the data. If the data signal received in step (45) is not a data transmission command (IIA), it is determined to be data 1 (12A), and this is stored in step (46). At step (47), wait for the next data to be received,
When data is received, it is determined in step (48) whether it is a data transmission command (IIA), and if it is a data transmission command (IIA), the process returns to step (43) in the same way as step (45). Data transmission command (I
If it is not IA), it is determined to be data 2 (12B) and stored in the chip (49). Step (50) ~
(52) has the same operation, and in step (52) data 3
(1,2C) is stored. In step (53), it is determined whether the received data signal is correct using the checksum (llb), and if it is correct, in step (54), the normal reception command (
IIB) is output. If not, step (55)
) to output an abnormal reception command (11C).

In addition, in the embodiment, signal transmission between the remote station (2) and the main panel (4) was explained.
The present invention is not limited to this, and can also be applied to signal transmission between the elevator (1) and other devices.

[Effects of the Invention] As explained above, in this invention, the data signal to be transmitted is composed of a control command and data, these specific bits are set to "1" and rQJ, respectively, and the number of bits of the control command is set to Because it is set as a transmission unit, data signals can be transmitted and received in both directions at any time, which has the effect of high-speed and reliable signal transmission6.

[Brief explanation of the drawing]

1 to 12 are diagrams showing an embodiment of an elevator signal transmission device according to the present invention, FIGS. 1 to 4 are configuration diagrams of transmission and reception data signals, and FIGS. 5 and 6 are diagrams showing transmission and reception data signals. 7 is a block diagram of the transmitting and receiving means, and FIGS. 8 and 9 are flowcharts showing the operation of the data distribution means.
FIG. 10 is a flowchart showing the operation of the data transmitting means, FIGS. 11 and 12 are flowcharts showing the operation of the data receiving means, and FIGS. 13 to 15 are diagrams showing a conventional elevator signal transmission device. , FIG. 13 is an overall configuration diagram, and FIGS. 14 and 15 are explanatory diagrams of signal transmission. In the figure, (1) is an elevator, (2) is a remote station, (4) is a main panel, (6) is a transmission line, and (1) is a remote station.
1) is a control command, (12) (12A) to (12C)
is data. Note that the same reference numerals in the figures indicate the same parts. Figure 131 Figure 3 Figure 11 Control 7-step command 1? Data Figure 2 1b Figure 4 1T. 12 (1゜b Remote stage tongue (2) Main l panel (4) Figure 10 Figure 13 Flash 15

Claims (1)

[Claims] In devices that exchange data signals bidirectionally by serial transmission between an elevator and a device other than the elevator, the data signal to be transmitted is composed of a control command and data, and these specific bits are A signal transmission device for an elevator, characterized in that the bit numbers of the control command are set to "1" and "0", respectively, and the number of bits of the control command is set as a transmission unit of the serial transmission.