JPH0390543U - - Google Patents
Info
- Publication number
- JPH0390543U JPH0390543U JP15171489U JP15171489U JPH0390543U JP H0390543 U JPH0390543 U JP H0390543U JP 15171489 U JP15171489 U JP 15171489U JP 15171489 U JP15171489 U JP 15171489U JP H0390543 U JPH0390543 U JP H0390543U
- Authority
- JP
- Japan
- Prior art keywords
- switching
- bus
- signal
- control circuit
- permission signal
- 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
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Small-Scale Networks (AREA)
Description
第１図は本考案装置の原理的ブロツク図、第２
図は本考案の一実施例を示す構成ブロツク図、第
３図はバス切換えの為にスイツチＳＷを操作した
場合の動作を示すタイムチヤート、第４図は本考
案のバス切換え装置が適用されるシステムの構成
概念図である。
ＢＳ１，ＢＳ２……バトンパス方式のバス、Ｓ
ＴＯ……一つの機器、ＣＢ……バス切換え装置、
１……スイツチ手段、２……切換え制御回路、Ｔ
Ｍ……タイマ。
Figure 1 is a basic block diagram of the device of the present invention, Figure 2
The figure is a configuration block diagram showing an embodiment of the present invention, Fig. 3 is a time chart showing the operation when the switch SW is operated for bus switching, and Fig. 4 is a bus switching device of the present invention to which it is applied. FIG. 2 is a conceptual diagram of the configuration of the system. BS1, BS2...Baton pass type bus, S
TO...One device, CB...Bus switching device,
1... Switch means, 2... Switching control circuit, T
M...Timer.
Claims (1)
一つの機器を切換えて使用するためのバス切換え
装置において、 前記一つの機器を前記２系統のバスのいずれか
に接続させるスイツチ手段と、 前記一つの機器が接続されているバス上の信号
を入力し、当該バス上に所定の時間以上信号が存
在しないのを検出し、切換え許可信号を出力する
切換え制御回路とを備え、 前記スイツチ手段はバス切換え要求があつた時
、前記切換え制御回路から切換え許可信号が出力
されている場合に駆動されることを特徴とするバ
ス切換え装置。[Claims for Utility Model Registration] In a bus switching device for switching one device to a baton-pass type bus divided into two systems, the one device is connected to one of the two buses. and a switching control circuit that inputs a signal on a bus to which the one device is connected, detects that no signal exists on the bus for a predetermined period of time, and outputs a switching permission signal. A bus switching device, characterized in that the switch means is driven when a switching permission signal is output from the switching control circuit when a bus switching request is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15171489U JPH0390543U (en) | 1989-12-29 | 1989-12-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15171489U JPH0390543U (en) | 1989-12-29 | 1989-12-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0390543U true JPH0390543U (en) | 1991-09-13 |
Family
ID=31698001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15171489U Pending JPH0390543U (en) | 1989-12-29 | 1989-12-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0390543U (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60233957A (en) * | 1984-05-07 | 1985-11-20 | Canon Inc | Data transmission control system |
| JPS60246148A (en) * | 1984-05-21 | 1985-12-05 | Canon Inc | Data transmission control system |
| JPS61253950A (en) * | 1985-05-07 | 1986-11-11 | Canon Inc | Network control system |
| JPS62120141A (en) * | 1985-11-20 | 1987-06-01 | Mitsubishi Electric Corp | Token transmission system |
| JPS62230138A (en) * | 1986-03-31 | 1987-10-08 | Toshiba Corp | Changeover equipment for duplicated transmission line |
| JPS63211936A (en) * | 1987-02-27 | 1988-09-05 | Yamatake Honeywell Co Ltd | Communication control system |
| JPS63263942A (en) * | 1987-04-22 | 1988-10-31 | Nec Corp | Token bus control system |
-
1989
- 1989-12-29 JP JP15171489U patent/JPH0390543U/ja active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60233957A (en) * | 1984-05-07 | 1985-11-20 | Canon Inc | Data transmission control system |
| JPS60246148A (en) * | 1984-05-21 | 1985-12-05 | Canon Inc | Data transmission control system |
| JPS61253950A (en) * | 1985-05-07 | 1986-11-11 | Canon Inc | Network control system |
| JPS62120141A (en) * | 1985-11-20 | 1987-06-01 | Mitsubishi Electric Corp | Token transmission system |
| JPS62230138A (en) * | 1986-03-31 | 1987-10-08 | Toshiba Corp | Changeover equipment for duplicated transmission line |
| JPS63211936A (en) * | 1987-02-27 | 1988-09-05 | Yamatake Honeywell Co Ltd | Communication control system |
| JPS63263942A (en) * | 1987-04-22 | 1988-10-31 | Nec Corp | Token bus control system |