JPH0485932U - - Google Patents
Info
- Publication number
- JPH0485932U JPH0485932U JP1990127310U JP12731090U JPH0485932U JP H0485932 U JPH0485932 U JP H0485932U JP 1990127310 U JP1990127310 U JP 1990127310U JP 12731090 U JP12731090 U JP 12731090U JP H0485932 U JPH0485932 U JP H0485932U
- Authority
- JP
- Japan
- Prior art keywords
- communication
- communication bus
- bus
- ready state
- station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Maintenance And Management Of Digital Transmission (AREA)
- Multi Processors (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Small-Scale Networks (AREA)
Description
第１図は二重化された通信バスを用いて通信を
行うシステムの要部構成を示す図、第２図は二重
化制御部２の機能を具体的に示す図、第３図は通
信バス選択手段５の動作手順を示すフローチヤー
ト、第４図は本考案の変形例を示す図である。
１……ステーシヨン、２……二重化制御部、３
……通信バスＢ１用通信制御部、４……通信バス
Ｂ２用通信制御部、５……通信バス選択手段、１
５……通信ドライバ、ＬＬ１，ＬＬ２……通信先
ステーシヨン状態リスト、ＳＷ１……バス切換え
スイツチ、Ｂ１，Ｂ２……二重化されたバス。
FIG. 1 is a diagram showing the main part configuration of a system that performs communication using a redundant communication bus, FIG. 2 is a diagram specifically showing the functions of the duplex control unit 2, and FIG. 3 is a diagram showing the communication bus selection means 5. FIG. 4 is a flowchart showing the operating procedure of the present invention, and is a diagram showing a modification of the present invention. 1... Station, 2... Duplex control unit, 3
...Communication control unit for communication bus B1, 4...Communication control unit for communication bus B2, 5...Communication bus selection means, 1
5...Communication driver, LL1, LL2...Communication destination station status list, SW1...Bus changeover switch, B1, B2...Duplicated bus.
Claims (1)
データを送出することができるステーシヨンが接
続され、該ステーシヨンまたは上位装置は、通信
バスに故障が発生した場合に、該バスの回復に対
処する機能を持つ通信制御装置２を具備しており
、 該通信制御装置２は、 各通信バス毎に作成された通信先ステーシヨン
状態リストＬＬ１，ＬＬ２と、 使用する通信バスを切換える切換えスイツチ
ＳＷ１と、 通信先ステーシヨン状態リストに基づいて使用
する通信バスを自動的に選択する通信バス制御手
段５とを有し、 該通信バス制御手段５は、 通信先ステーシヨン状態リストのステーシヨン
がレデイ状態のとき通信バスもレデイ状態である
と判定することにより、各通信バス毎に状態判定
を行い、いずれかの通信バスのみがレデイ状態に
あるときは、そのレデイ状態の通信バスを使用す
るように前記切換えスイツチＳＷ１を切換え、双
方の通信バスが共にレデイ状態で無い場合には、
通信不能を上位装置に通知し、双方の通信バスが
共にレデイ状態である場合には、自ステーシヨン
のアドレスの特性を利用して使用する通信バスを
決定し、その決定したバスを使用するように前記
切換えスイツチＳＷ１を切換えるようになつてい
ることを特徴とする通信制御装置。[Claims for Utility Model Registration] A station capable of transmitting data from a higher-level device is connected to a duplex communication bus, and the station or the higher-level device is able to transmit data to a duplex communication bus when a failure occurs in the communication bus. It is equipped with a communication control device 2 that has a function to deal with bus recovery, and the communication control device 2 switches between communication destination station status lists LL1 and LL2 created for each communication bus and the communication bus to be used. It has a changeover switch SW1 and a communication bus control means 5 that automatically selects a communication bus to be used based on a communication destination station status list, and the communication bus control means 5 is configured to: By determining that the communication bus is also in the ready state when the communication bus is in the ready state, the state is determined for each communication bus, and if only one of the communication buses is in the ready state, the communication bus in the ready state is used. Switch the changeover switch SW1 to , and if both communication buses are not in the ready state,
Notifies the higher-level device that communication is impossible, and if both communication buses are in the ready state, determines which communication bus to use using the address characteristics of its own station, and uses the determined bus. A communication control device characterized in that the changeover switch SW1 is changed over.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990127310U JPH0485932U (en) | 1990-11-29 | 1990-11-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990127310U JPH0485932U (en) | 1990-11-29 | 1990-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0485932U true JPH0485932U (en) | 1992-07-27 |
Family
ID=31874811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990127310U Pending JPH0485932U (en) | 1990-11-29 | 1990-11-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0485932U (en) |
-
1990
- 1990-11-29 JP JP1990127310U patent/JPH0485932U/ja active Pending
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