JPS60239143A - Connecting system between networks - Google Patents

Abstract

PURPOSE:To attain data communication between networks simply by arranging a transfer control station to each network and connecting the transfer control stations. CONSTITUTION:The transfer control stations 12', 12' of both the networks utilize standard interface sections 18-21, which are connected by a transmission line 15. The control of each controller 10 by a host computer 13 is attained and the transmission/reception of data of the programmable controllers 10 of both the networks are attained and communication is attained by connecting other different devices such as CRT, printer and bar code reader to the transfer control stations 12, 12. Since both the networks are connected via the transfer control stations 12', 12' shown in the figure, the data between the networks is transmitted and received through the line and the data is communicated simply through the host computers 13, 13.

Description

[Detailed Description of the Invention] Technical Field The present invention relates to an optical network of a programmable controller and a host computer connected to all transmission paths, and particularly relates to a coupling method between this type of odd work. Formula% In recent years, FMS (FREXIB) has been increasing due to the adoption of robots.
FA (FACTORY AUTOMATIO) centered on LE MANUFACTURING SYSTEM)
N) has been proposed and introduced.

Under these circumstances, the PC (PROGRAMABLE CONTROL) that controls various automated equipment, which is the center of the system, is
LER) has been widely adopted and the field of application is expanding, but along with this, the PC itself is not only capable of sequence control, but also N
It has been designed with a wide range of functions to support a wide range of applications such as C (NUME RI CAL CONTROLLER).

When trying to automatically control a production line using these PCs, the capabilities of each individual piece of equipment are important, but we also need to make sure that the system built by combining them has the best overall effect. Therefore, networking has become necessary, such as organically combining information from individual equipment and centrally managing production information using a host computer. In order to perform centralized management and group control of various equipment,
For example, as shown in the arrow (A) side of FIG. A plurality of programmable controllers 5 can be connected, and the host computer 3 can monitor the movement of each programmable controller 5. A network system called a so-called computer link has been proposed, which realizes functions such as -1 control.

Conventionally, this type of network was used independently, but due to the increase in the number of various types of equipment and the need for centralized management, it became desirable to be able to communicate with different networks. , as shown in Figure 3 (a)
6. An interface comprising a side network and (b) side X and node work on each host computer 3゜3'.
One possible method is to connect both networks by connecting the 6' computers, but this method has the problem that the data transmission procedure becomes complicated because the higher-level computers must be connected.

<Purpose> The present invention has been made in view of the problems of the prior art, and by arranging transfer control stations in each network and connecting these transfer control stations, it is possible to easily communicate data between networks. The present invention aims to provide a new coupling method between networks of programmable controls that can perform the following steps.

<Example> The present invention will be explained in detail below based on the drawings.

FIG. 1 [-j is a diagram showing a coupling method between networks according to the present invention.

This figure shows a case where two left and right networks having the same function are connected. In the figure, 10 is a programmable controller, a transmitting/receiving station connected to the controller, and 12 and 12' are various signal transfer control units. station,
+8f-j host computers, which are connected to a ring-shaped transmission line 14 made up of optical fibers 14 as shown. Furthermore, the transfer control stations +2' and +2' of the left and right works are coupled via a transmission line 15.

The specific configuration of the transfer control station 12, 12' is as shown in FIG. That is, an input signal waveform shaping section 17 equipped with an optical-electrical signal conversion circuit that converts an optical signal, which is an input signal, into an electrical signal; an input signal phase synchronization section 17 that includes an ILPLL circuit; and a code conversion section that converts an optical signal, which is an input signal, into an electrical signal. 18. Output signal selection gate unit 19 that selects whether to output the input signal as it is or to delete the input signal and output new data based on the control signal from the human output control unit 20; input signal determination; Input/output control that performs important functions such as (transmission rights, received transmission rights, data addressed to own station, data addressed to other stations, and various other control signals), error checking of input signals, and output according to the output signal format. 20, an input/output signal control section 21, a program memory section 22 of the control section 2I, a data memory section 24 for temporary storage of input/output data and calculation results, a control circuit section 25, and a programmable controller 10 connected to this standard interface. Data to the host computer 13 and control commands, data, etc. sent from the host computer 13 to the programmable controller 10 are sequentially sent according to a certain procedure (memory section 25 for temporary storage, control circuit section 26, control circuit, output signal driver circuit, etc.) A control unit 27 that controls input/output of the standard interface units 31 to 34 and exchanges communication procedures, a program memory unit 28 of the control unit, a memory unit 29, and selection of the standard interfaces 81 to 34. The circuit section 30, the operation abnormality monitoring section 35 of the control section 21 consisting of a timer, etc., the abnormal signal control section 36 that judges the signals from the operation abnormality monitoring sections 35 and 37, and the clock and timing of the entire transfer control station circuit. Timing unit 38 that controls signals
, a power supply section 39 of the transfer control station 21, a hood conversion section 40 that converts NRZ':J-do into a Manchester hood, and an output signal conversion section 48 that converts an electrical signal into an optical signal. Therefore, the transfer control of both networks NJ+2'
, +2' is the standard interface part! 8 to 21, and are coupled by a transmission line 1F.

Both such networks are programmable controllers)
Transmission and reception of data between La 10 comrades and host computer F
Each controller 1o can be controlled by f13,
Furthermore, it is possible to connect and communicate with other different devices such as a CRT, a printer, and a barcode league to the transfer control station 12.12.

Since these two networks are connected via transfer control stations +2' and +2'i having the configuration shown in Fig. 2,
Data transmission and reception between the networks can be performed through this, and communication can be performed more easily than through the host computer devices 13, 13. The above example assumes that both networks use all the same communication methods, but if they use different communication methods, for example, a converter capable of converting the transmission format, transmission speed, and transmission procedure may be used. There is a method for connecting the upper computer devices 13 and 13.

<Effects> As explained in detail above, in the inter-network coupling method according to the present invention, all the transfer control stations for each scale signal are arranged on the network, and the transfer control stations on one network and the transfer control stations on the other network are connected to each other. By connecting the transfer control station, all communication between the above networks is possible, so all data transmission procedures between the networks are fp! It can be stored in three formats, and can be easily communicated to other networks.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the method of the present invention, FIG. 2 is a block circuit diagram of a transfer control station, and FIG. 3 is a diagram showing the conventional method. 10 is a programmable controller, 11d transmitting/receiving station, 12.12' is a transfer control station, 3 is a host computer device, 14 is a transmission line

Claims (1)

[Claims] 1 A method of coupling between networks of programmable controllers, each consisting of a plurality of programmable controllers and higher-level computer devices connected on all transmission paths, in which a transfer control station for various signals is placed on the network, and the transfer on one network is An inter-network coupling method characterized by coupling a control station and a transfer control station on the other network to enable full communication between the networks.