JPH0757005A - Information transmission equipment - Google Patents

Abstract

PURPOSE:To shift data by shift registers at a high speed by moving the shifts of data by the respective registers by a dedicated information moving means as a work is conveyed. CONSTITUTION:A PLC-A transmits information to production machines #1-#3 and a PLC-B transmits the information of production machines #4-#6. Both the LPCs are connected to each other by IOs and a monitor device 10 is so constituted as to have a communication with both the PLCs. Both the PLCs are equipped with the shift registers, provided with areas where vehicle kind information as much as three production machines can be shifted, corresponding to the respective production machines. Further, both the PLCs are provided with CPUs which function to shift the vehicle kind information as the work moves. Therefore, those CPUs function as information moving means. Thus, the shift registers are divided into plural parts to enable high-speed transmission.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information transmission device capable of sequentially transmitting production data to a next process at high speed in accordance with transportation of a vehicle in, for example, an automobile production factory.

[0002]

2. Description of the Related Art Conventionally, for example, in a production factory of an automobile or the like, a shift register for moving machining data of a work together with conveyance of the work has been used. Machining data used in the previous process is sent to the shift register together with the conveyance of the work, and a predetermined work is performed on the conveyed work according to the sent machining data. When the work is completed, the processed data is sent to the subsequent process. In this way, the processing data is sequentially sent to the subsequent process when the work is completed.

[0003]

However, this shift register normally has a capacity of one line mounted in a factory, and the transfer of processed data in this shift register is normally performed by one CPU. The shift process takes time,
There is a slight time lag in the transfer. When this time lag occurs, it is necessary to regulate the operation of the production machine in each process during that time, which causes a problem that production efficiency deteriorates.
Further, there is a problem that the operation sequence processed by the CPU is also delayed.

In order to solve such a problem, there is a shift register having a plurality of shift registers. However, since each shift register is controlled by one CPU, there is a shift between the shift registers. Another problem has arisen, such as the need for interlocking of the registers, and complicated communication control between registers.

The present invention has been made in order to solve such a conventional problem, and an object thereof is to provide an information transmission device capable of high-speed transmission by dividing a shift register into a plurality of parts. .

[0006]

According to the present invention for achieving the above object, a plurality of production machines are arranged along a conveyance route of a work, and information is provided to each of the plurality of production machines according to the conveyance of the work. And a shift register assigned to each unit of the plurality of production machines divided into N units, and a shift register in the shift register provided that the work on the work in the production machine is completed. And information moving means for moving the information of (1) together with the conveyance of the work.

[0007]

The present invention thus constructed operates as follows.

The shift register is one of several production machines.
It is assigned every N units. Therefore, a total of N shift registers are assigned to a plurality of production machines. The movement of information in each shift register is performed by the information moving means corresponding to each shift register. However, since the capacity of each shift register is set to 1 / N of all production machines, the information is not moved. It will be very fast.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of an information transmission device according to the present invention.

What is shown in the drawing is a diagram assuming a production facility comprising two production steps and six production machines so that the features of the present invention can be easily understood. The illustrated PLC-A has # 1 to # 1.
It is a PLC that controls the transmission of information (specifically, vehicle type information) to the # 3 production machine. Moreover, PLC-B is # 4 to # 6.
It is a PLC that controls the transmission of information to the production machine. The two PLCs are connected to each other by an IO (not shown). The monitor device 10 is configured to be able to communicate with both PLCs, has a function of giving necessary information to the PLC-A, and monitoring the progress of the target work based on the information from the PLC-A and the PLC-B. I have it. In this embodiment, the information means vehicle type information.

Both PLCs are provided with a shift register having a function of shifting the vehicle type information according to the conveyance of the work. In this embodiment PLC-A and PLC-B
Further, a shift register is provided in which an area for shifting the vehicle type information for three production machines is provided corresponding to each production machine. In addition, both PLCs have a CP that has a function of shifting the vehicle type information as the work moves.
U is provided for each. Therefore, these CPUs function as information transfer means.

FIG. 2 shows the monitor device 10 and C shown in FIG.
It is a figure which shows the detailed block diagram with PU-B. In this block diagram, only the portion relevant to the present invention is extracted. Although detailed blocks are not shown for CPU-A, CPU-A does not
It has the same configuration as.

The input register 11 built in the monitor device 10 is a register for inputting read data, that is, vehicle type data, and outputs the vehicle type data read by the input register 11 to the stage NO processing section 12. . The stage NO processing unit 12 has a function of determining to which stage the vehicle type data output from the input register 11 is based on the stage NO added to the vehicle type data. The monitor device 10 collects and rewrites vehicle type data by using this stage NO as an absolute address. The stage NO output unit 13 outputs a stage NO for instructing which stage and which vehicle type data should be sent according to the conveyance of the work. The output register 14 inputs the stage NO output from the stage NO output unit 13 and outputs it to the outside.

The input register 21 provided in the PLC-B is a stage N output from the output register 14.
O is input and output to the stage NO interpretation processing unit 22. The stage NO interpretation processing unit 22 interprets the stage NO from the input register 21 and outputs it to the stage NO search unit 24. The stage NO search unit 24 searches for a corresponding stage NO from the illustrated table stored in a shift register (not shown) provided in the CPU-B. The relevant stage data reading unit 25 reads the data of the relevant stage searched by the stage NO search unit 24. The data read by the corresponding stage data reading unit 25 is output to the output register 26 and stored. The data stored in the output register 26 will be sent to the input register 11.

On the other hand, PLC-B is provided with another input register 27, which receives the data from the output register 30 provided in PLC-A,
This is stored in the shift register provided in C-B.

Here, the contents of the data stored in the shift register of each PLC will be described. PLC
The data stored in -A is as follows. CPU
NO indicates the number of the CPU having the shift register. Since the operation of the PLC-A is controlled by the CPU A, all the numbers are A. The stage No. indicates in which stage each work exists, and the works 1 and 2 are the stage 1
And the work N is located on the stage 3. In the present embodiment, the data indicates the vehicle type data as described above, but the data moves as the work moves. That is, the work moves to the stage 3, and when the work on the stage 3 is completed, the data is output to the output register 30 at the same time as this work, and at the same time, the data is shifted by one stage. At this time, the first area becomes an empty area, but new data is supplied from the monitor device 10 to this area.

The data stored in PLC-B is also PL
The configuration is exactly the same as that of C-A, and PLC-
For the data stored in the shift register B, the data sent from the output register 30 is the input register 2
Will be added via 7.

The above data shift and transfer from the output register 30 to the input register 27 are carried out by the respective P.
The CPU provided in the LC, that is, the CPU A or the CPU B, respectively takes charge.

The information transmission apparatus of the present invention configured as described above operates as follows. First, Fig. 1
When a work is conveyed to the stage corresponding to the # 1 production machine in the state where there is no work, as shown in FIG. 5, the monitor device 10 sends the vehicle type data related to the work to the shift register of the CPU A together with the conveyance. . When the work for this work is completed and transported to the next process,
In the shift register of the CPU A, the work is transported and the data is shifted, and the data for the work newly transported in the process is sent from the monitor device 10 into the shift register. By repeating the above operation, the CPU
When it becomes necessary to transfer data from the shift register A to the next shift register, this data is once sent to the output register 30 and then to the input register 27 of the CPU B which shifts the data from the next step. Send that data. When data is received at the input register 27, CP
The data is stored in the shift register of the UB.

Therefore, the data shift is performed by the CPU A
The shift register in the CPU is controlled by the CPU A, and the shift register from the CPU A to the shift register C
Even when the data is transferred to the PUB shift register, it is controlled by the CPU A, and the data is received by the CPU B.
And the shift register in the CPU B is controlled by the CPU B.

In the above description, how the data is read from the shift register was not explained, but this will be explained while explaining the operation of the CPU B. When the monitor 10 makes a data request for a certain stage, the stage NO output unit 13 outputs the requested stage NO to the stage NO interpretation processing unit 22 via the output register 14 and the input register 21. Stage NO
The search unit 24 interprets the requested stage NO,
The data corresponding to the stage NO is searched. The corresponding stage data reading unit 25 reads the searched data of the corresponding stage and outputs this data to the output register 2
6, the stage NO processing unit 12 via the input register 11
Will be output to.

[0022]

As described above, according to the present invention, a shift register is assigned to each unit of the plurality of production machines divided into N units, and data shift in each register is dedicated to information movement. Since the work is moved along with the conveyance by the means, the data in the shift register can be shifted at high speed.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an information transmission device according to the present invention.

FIG. 2 is a detailed block diagram of an information transmission device according to the present invention.

[Explanation of symbols]

 10 ... Monitor device

Claims (1)

[Claims] 1. An information transmission device in which a plurality of production machines are arranged along a conveyance path of a work, and which transmits information to each of the plurality of production machines according to the conveyance of the work, which is divided into N units. And a shift register assigned to each unit of the plurality of production machines, and information transfer means for moving the information in the shift register together with the transfer of the work on condition that the work on the work in the production machine is completed. An information transmission device having.