JP2011118732A - I/o node - Google Patents

Abstract

An I / O node that can be expanded without degrading the module mounting efficiency upon expansion to an optical I / O bus or expansion to a local I / O bus is realized.
An I / O bus repeater that communicates with a host device or another I / O node via an external I / O bus; communicates with the I / O bus repeater; In an I / O node having an interface module containing a bus control means for communicating with a plurality of modules via
The interface module includes an extended I / O bus transmission / reception unit that communicates with the bus control unit.
[Selection] Figure 1

Description

  The present invention includes an I / O bus repeater that communicates with a host device or another I / O node via an input / output (hereinafter referred to as I / O) bus, a plurality of I / O bus repeaters, and a plurality of The present invention relates to an I / O node having an interface (hereinafter referred to as I / F) module having a bus control means that communicates with an I / O module, and improves the bus expandability without reducing the mounting efficiency of the I / O module. Realize.

  FIG. 4 is a functional block diagram illustrating a general configuration example of I / O node extended connection. The I / O node 10 includes duplexed I / F modules 11 and 12, duplexed power supply modules PW1 and RW2, and eight I / O modules I / O1 to I / O8. 12 communicates with the host device 30 via a wired I / O bus.

  When the I / O node 20 having the same configuration is expanded and connected to the I / O node 10, the repeat function of the I / F modules 11 and 12 is used to connect the I / F modules 11 and 12 to the I / O node. Similarly, the I / F modules 21 and 22 of the node 20 are connected by a wired I / O bus. Further, when the I / O node is additionally expanded, the same connection form is repeated.

  When the distance to the added I / O node is long, or when the amount of communication with the host device 30 is large, expansion connection using an optical bus is performed instead of the wired I / O bus. FIG. 5 is a functional block diagram showing an example of a general configuration when an expansion connection is made with an optical bus.

  In the I / O node 10, duplexed optical I / F modules 13 and 14 are mounted at mounting locations of two of the eight I / O modules (I / O 7 and I / O 8). Similarly, in the I / O node 20, the duplexed optical I / F modules 23 and 24 are mounted at mounting locations of two of the eight I / O modules (I / O7 and I / O8).

  The optical I / F module 13 and the optical I / F module 23 are connected by an optical bus L1. Similarly, the optical I / F module 14 and the optical I / F module 24 are connected by the optical bus L2, thereby realizing duplex expansion by the optical bus.

  FIG. 6 is a detailed functional block diagram showing a functional configuration in the block of FIG. For simplicity, only the configuration on the master side of the duplex configuration is shown. The slave side has the same configuration. In the I / O node 10, the I / O bus repeat means A in the I / F module 11 communicates with the external I / O bus and also communicates with the I / O bus transmission / reception means B via the internal I / O bus. To do.

  The bus control means C in the I / F module 11 communicates with the outside via the I / O bus transmission / reception means B and is connected to the local I / O bus via the local I / O bus transmission / reception means D 6 It communicates with the I / O modules I / O1 to I / O6.

  The I / O bus transmission / reception means B in the optical I / F module 13 communicates with the I / O bus transmission / reception means B in the I / F module 11. The bus control means C in the optical I / F module 13 communicates with the outside via the I / O bus transmission / reception means B in the I / F module 11, and also the optical bus via the I / O bus optical transmission / reception means E1. L1 communicates with the I / O bus optical transmission / reception means E1 on the optical I / F module 23 side of the I / O node 20. The internal functional configuration of the I / O node 20 is the same as the functional configuration of the I / O node 10.

  As a form of function expansion of the I / O node, there is a local I / O bus expansion function for increasing the number of connected I / O modules in addition to the optical bus connection function.

  When this function expansion is performed in the I / O node 10, the local I / O bus expansion module 14 is connected to the local I / O bus of the I / O node 10. The local I / O bus timing adjustment means F in the local I / O bus expansion module 14 is connected to the local I / O bus, local I / O bus and extended local I / O via the local I / O bus transmission / reception means D, respectively. Communicate with the bus.

  When such a local I / O bus expansion module 14 is mounted on an I / O node, the number of I / O modules connected to the local I / O bus of the I / O node 10 is reduced. .

JP 2001-100816 A

  In the conventional I / O node configuration, in order to expand to the optical I / O bus or to the local I / O bus, it is necessary to mount a dedicated module for expansion, and the number of mounted modules is standardized. In the case of the specified number, it is necessary to reduce the number of I / O modules mounted, and there is a problem that the I / O module mounting rate is lowered.

  An object of the present invention is to realize an I / O node that can be expanded without degrading the module mounting efficiency when expanding to an optical I / O bus or expanding to a local I / O bus.

In order to achieve such a subject, the present invention has the following configuration.
(1) An I / O bus repeater that communicates with a host device or another I / O node via an I / O bus, and communicates with the I / O bus repeater and communicates with a plurality of I / O modules. In an I / O node comprising an I / F module having a bus control means,
The I / O node includes an extended I / O bus transmission / reception unit that communicates with the bus control unit.

(2) The I / O node according to (1), wherein the bus control unit communicates with another I / O node by an optical signal via the extended I / O bus transmission / reception unit.

(3) The I / O according to (1), wherein the bus control means communicates with an I / O module connected to an extended local I / O bus via the extended I / O bus transmitting / receiving means. O node.

(4) The I / O node according to any one of (1) to (3), wherein the expansion I / O bus transmission / reception means is formed in a housing of the I / F module.

(5) The I / O node according to any one of (1) to (4), wherein the I / F module is duplexed by the same I / O node.

According to the present invention, the following effects can be expected.
(1) According to the expansion I / F module of the present invention, in addition to the standard repeater function and the local I / O bus control function, the communication function with the expansion I / O bus transmission / reception means built in the same housing is provided. In addition to the bus control means, communication with the optical I / O bus or the extended local I / O bus can be realized via the extended I / O bus transmission / reception means.

(2) Therefore, it is not necessary to mount a dedicated module for expansion when expanding the function to the optical bus or the extended local I / O bus, and there is no reduction in the number of I / O modules that can be mounted on the I / O node. Therefore, function expansion can be realized without reducing the number of slots for I / O modules.

(3) By connecting a local I / O bus expansion module whose mounting position can be freely set to the local I / O bus, module information having various functions can be notified to the local I / O bus.

FIG. 3 is a functional block diagram illustrating an embodiment of an I / O node when the present invention is applied and extended connection is performed using an optical bus. It is a detailed functional block diagram which shows the function structure in the block of FIG. It is a detailed functional block diagram showing a configuration in which an extended local I / O bus is connected by applying the present invention. It is a functional block diagram which shows the general structural example of an I / O node expansion connection. It is a functional block diagram which shows the general structural example at the time of carrying out expansion connection by the optical bus. It is a detailed functional block diagram which shows the function structure in the block of FIG.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a functional block diagram showing an embodiment of an I / O node when the present invention is applied and extended connection is made by an optical bus. The same elements as those of the conventional configuration described with reference to FIG.

  The I / O nodes to which the present invention is applied corresponding to the conventional I / O nodes 10 and 20 are indicated by an I / O node 100 and an I / O node 200. The I / O node 100 includes redundant extended I / F modules 101 and 102. Similarly, the I / O node 200 includes redundant extended I / F modules 201 and 202.

  The extension I / F module 101 and the extension I / F module 201 communicate with each other via the optical bus L1 by the built-in I / O bus optical transmission / reception means E1. Similarly, the expansion I / F module 102 and the expansion I / F module 202 communicate via the optical bus L2 by the I / O bus optical transmission / reception means E2 incorporated therein.

  According to such a configuration, there is no reduction in the number of I / O modules even when an expansion connection is made with an optical bus, and it is possible to connect and use eight units I / O1 to I / O8 as in the conventional configuration. It becomes possible.

  FIG. 2 is a detailed functional block diagram showing a functional configuration in the block of FIG. For simplicity, the configuration on the master side of the duplex configuration is shown. The slave side has the same configuration. The same components as those in the detailed functional block configuration shown in FIG.

  In the expansion I / F modules 101 and 201, the expansion bus control means C ′ includes an interface that communicates with the expansion I / O bus optical transmission / reception means G1 in addition to the standard functions of the bus control means C described in FIG. Both communications are performed by the optical bus L1 connected to the expansion I / O bus optical transmission / reception means G1.

  FIG. 3 is a detailed functional block diagram showing a configuration in which the extended local I / O bus is connected by applying the present invention. In the extended I / F module 101, the extended bus control means C ′ includes an interface for communicating with the extended local I / O bus transmission / reception means H in addition to the standard functions of the bus control means C described in FIG. It communicates with the I / O module connected to the extended local I / O bus via the local I / O bus expansion module 14 connected to the local I / O bus transmission / reception means H.

  The expansion I / O bus optical transmission / reception means G1 and the expansion local I / O bus transmission / reception means H form an expansion I / O bus transmission / reception means to which the expansion bus control means C ′ can interface, and can be switched according to the purpose of use. .

  Generally, the I / O module in the I / O node is connected to the local I / O bus via the BackPlaneBus, and the mounting position is physically restricted. For example, there are only 8 modules per node.

  As shown in FIG. 3, by simply mounting the I / O local bus expansion module from the expansion I / F module expansion terminal, the degree of freedom can be increased regardless of the number of modules physically limited at present. A module can be connected to the extended local I / O bus.

  For example, when a module for monitoring the temperature and status in the cabinet is connected to the local I / O bus, it is possible to realize a usage form in which only one module is easily connected from another free place.

30 Host device 100 I / O node 101, 102 Expansion I / F module 200 I / O node 201, 202 Expansion I / F module L1, L2 Optical bus I / O1-I / O8 I / O module PW1, PW2 Power supply module

Claims (5)

I / O bus repeat means for communicating with a host device or another I / O node via an I / O bus, and bus control means for communicating with the I / O bus repeat means and with a plurality of I / O modules In an I / O node comprising an I / F module having
The I / O node includes an extended I / O bus transmission / reception unit that communicates with the bus control unit.   2. The I / O node according to claim 1, wherein the bus control means communicates with another I / O node by an optical signal via the extended I / O bus transmission / reception means.   2. The I / O node according to claim 1, wherein the bus control means communicates with an I / O module connected to an extended local I / O bus via the extended I / O bus transmission / reception means.   4. The I / O node according to claim 1, wherein the expansion I / O bus transmission / reception means is formed in a housing of the I / F module.   5. The I / O node according to claim 1, wherein the I / F module is duplexed by the same I / O node. 6.

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