JPS6139743A - Local area network - Google Patents

Abstract

PURPOSE:To attain effective use of a personal computer by editing data of a terminal device for each lot at the terminal side, giving a data transmission request to a terminal station at an idle time of the personal computer and transmitting the edited data for each lot to a nonvolatile RAM at that time. CONSTITUTION:Lump data such as the number of products manufactured, what machine is used for processing the lot, its operating time, and causes to a fault in case of non-operation is inputted to a reception buffer 8 corresponding to the designated lot number, and a data edition controller 7 edits the data as lot data. The content is inputted to a transmission buffer 5 to attain transmission stand- by state. Since operating information of machines such as machine tools is stored in each terminal station in this way, when it is desired to know the information, the personal computer 17 designates which data of which input terminal station is to be desired at the idle time. Its transmission request signal is transmitted from a line interface 14 via a data bus 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a local area network that can promote FA (factory automation) and the like.

[Conventional technology] 1. In recent years, there has been a call for F and A to improve productivity in factories, and at the same time as automation of machines and equipment, it is necessary to analyze the operating status of the machines, load distribution, and aggregate production results. Increasingly, there is a demand for a system that can manage each individual machine, including analysis of yield.

One of them is a mechanical control microcomputer,
Highly reliable information transmission systems have been proposed that can be connected to personal computers that perform production management and quality control to form a local area network (hereinafter referred to as rLANJ) at a production site.

When configuring a LAN to control equipment such as manufacturing machines and processing machines, it is desirable to be able to manage the operating status of the machines.

For example, managing equipment operating time, maintenance time, and down time,
Through analysis, it becomes possible to know the efficiency of equipment, the timing of maintenance inspections, and the division of work.

The general method for collecting data from each terminal IA device is to poll each terminal station from a PC at regular intervals (for example, every 1 to 10 seconds), check whether the terminal station has data to send, and then If there is data, a transmission request is issued and the data is received. 2.

In this type of system, the computer must poll at regular intervals to constantly monitor the timing at which the terminal equipment starts outputting data, and the computer cannot check whether data is present on other terminals. If data is received while the computer is running, there is a risk of receiving incorrect data, and since the computer's idle time is within a short time interval of 1 to 10 seconds in the above example, polling pulses are not sent. 71 cannot be performed while the operation is being performed.
Therefore, there was a problem that the usage rate of computers was low.

In order to solve such problems, the present inventors
The operating status of equipment, especially the on/off status of contacts such as control relays (including the on/off status of non-contact relays, etc.) is aggregated by category and stored in non-volatile RAM, and the data is collected from a personal computer serving as a terminal station. He first invented a LAN that could transmit data in response to a transmission request, and filed a patent application (patent application 5El-23 of 1973).
No. 3161, No. 8, filed on December 10, 1982).

[Problem that the invention seeks to solve]

However, in the LAN of the previous invention, although the tally results can be collected by a personal computer, it is not possible to determine which lot number of each machine the data tally results are from.

The present invention solves these conventional problems by storing the data of terminal devices grouped by loft at each terminal station, and transmitting the data when a transmission request is received from a personal computer during the free time of the personal computer. The purpose is to increase the utilization rate of personal computers by transmitting grooved data.

[Means for solving problems]

In the present invention, the data of the terminal equipment is edited for each lot on the terminal side, and a data transmission request is sent to the terminal station during the free time of the PC, and at that time, the data edited for each lot is stored in the non-volatile RAM. This configuration aims to make effective use of the computer by transmitting information.

〔Example〕

The present invention will be specifically described below based on embodiments shown in the drawings.

FIG. 1 is a block diagram showing the configuration of the present invention, and in the figure f
11 is a data bus, (2) is a control station, (3) is a terminal station,
(4) is an interface for transmission control, (5) is a transmission buffer for transmission control, (6) is a sofa to receive for transmission control,
(7) is a data editing controller, (8) is a receive buffer for data input, (9) is a transmit buffer for data output, 00)
are terminal equipment interfaces, (!ll-1) to (11
-4) is a lower terminal device, and (12) is an LED operation display controller.

Each of the above buffers is F LF,,0 (,FIR5T
-1,N-FIR5T-OIIT-type non-volatile memory, which outputs the oldest data each time the input is updated.

The grouping map ROM (, 20) is a memory in which the type of data from the lower terminal devices (11-1) to (11-4) is registered in advance to which group the data belongs. It is for dividing the data coming into the editing controller (7).

The transmission control interface (4) interfaces with the network control station (2) and communicates with other stations through the communication buffer T51. +61. +81. +91 is sent and received.

The terminal device interface 00 is connected to the lower terminal device (11
-1) to (11-4) to collect and distribute data.

In addition, the other terminal station (13) has a transmission control line input/output controller (14) similar to the above, a communication buffer (15), and a personal computer (17) in order to exchange data with the personal computer (17). An input/output controller (16) is provided.

[Effect]

First, in FIG. 1, lower terminal equipment (11=1) to (
11-4) data, such as the operating status, operating time, power consumption, etc. of manufacturing machines, machine tools, air conditioning machines, power machines, etc., are manually input in pulses, and the integrated value of the pulses is used as the starting point of the train start and stop signal. , grouped by telophase. The first data in the group is manually or automatically entered using a numeric keypad data entry controller, barcode reader, magnetic card, etc.
Enter the data for Roso 1~ that corresponds to the heading.

A bunch of data, such as how many units are currently being produced for a specified lot number, what kind of machine was used to process that loft, how long it was in operation, and if it was not in operation, the cause of the defect. is input into the reception buffer (8) and edited as data for each lot by the data editing controller (7). The contents are input into the transmission buffer (5) and kept in a transmission standby state.

In this way, each terminal station stores operation information of equipment such as machine tools, so if you want to know that information, use the computer (17) to check which input terminal station it is in when it is idle. Specify what data you want. The transmission request signal is sent from the line interface (14) via the data bus fil.

The input terminal station (3) detects that the address of the request signal is its own, and attaches a loft number to the information stored in the transmission buffer (5), which is a non-volatile RAM, along with its own attribute address. and transmits it to the terminal station (13). The data is sent to the terminal station that issued the data transmission request (
13) and input into the personal computer (17).

Note that a data transmission request can be issued in the same way from a personal computer of another terminal station, and the input terminal station that has received the data request will send the stored information to the personal computer that made the request. Therefore, it is possible to receive and receive information from any terminal station through the data bus (11).

The data received in this manner is displayed on the CRT screen of the personal computer (17) of the terminal station (13), and is output to an attached printer if necessary.

The computer (17) automatically prints out the production numbers based on the data for each lot, and displays information such as the line operating status.
RT monitor, data collection on yield and defect causes, system management such as machine operation time charts, etc., summarized for each lot.
Can be monitored and analyzed.

FIG. 2 shows an example of a LAN in which the present invention is applied to a production line monitoring system. In the figure, (1) is a data bus, (11-1) to (11-10) are lower terminal devices, and their operating status is monitored by terminal stations (3-1) to (3-10). . (13) is a terminal station for aggregation, and a personal computer (17) collects and analyzes data.

The data for each lower terminal device includes a data entry operator (21) for specifying mouth/7-tooth, and a loft switch (21).
2) Outputs from a defective item input device (23), a switch input device (24) for manufacturing machines, etc., an automatic production quantity input device (25), etc. are input to the terminal station.

In this way, the operating status of lower-level terminal equipment is edited for each lot.

〔Effect of the invention〕

As described above, according to the present invention, the data of the terminal equipment is grouped and stored for each loft at each terminal station, and the grouped data is stored when a transmission request is received from the personal computer during the free time of the personal computer. Since the information is transmitted, it is possible to understand and analyze the status of the terminal equipment for each lot.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a local area network according to the present invention, and FIG. 2 is a block diagram showing an embodiment of the present invention. (1): Data path (2): Control station (3): Terminal station (4): Transmission control interface (5): Transmission control transmission buffer (6): Transmission control reception buffer (7): Data editing Controller (8): Data input reception buffer (9): Data output transmission buffer 001: Terminal equipment interface (11-1) to (11-4): Lower terminal equipment (12)
: LED operation display controller (13) : Terminal station (14) Niline input/output controller (15) : Communication buffer (16) : Terminal input/output controller ('17) : Personal computer (1B) : Transmission buffer (19) : Receive buffer (20) : ROM Patent applicant Computer Technica Co., Ltd. JP-A-Sho Gl-39743 (6)

Claims (1)

[Claims] 1. In a local area network in which each terminal station connected to a common data bus is equipped with a non-volatile buffer memory as an input/output data storage device, data of lower-level terminal devices connected to the terminal station is aggregated for each lot at the terminal station. . A local area network characterized in that the edited data is stored in the nonvolatile buffer memory and the data is transmitted when a transmission request is received from another terminal station.