JPH02111802U - - Google Patents
Info
- Publication number
- JPH02111802U JPH02111802U JP2066489U JP2066489U JPH02111802U JP H02111802 U JPH02111802 U JP H02111802U JP 2066489 U JP2066489 U JP 2066489U JP 2066489 U JP2066489 U JP 2066489U JP H02111802 U JPH02111802 U JP H02111802U
- Authority
- JP
- Japan
- Prior art keywords
- switching
- switching device
- processing device
- output
- turned
- 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
- 238000010606 normalization Methods 0.000 claims 1
- 238000004092 self-diagnosis Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Safety Devices In Control Systems (AREA)
Description
第１図は、この考案の一実施例を示す二重化シ
ステムの切替装置の回路ブロツク図、第２図は、
同切替装置のデジタル系の保持回路を示す回路図
、第３図は、アナログ系の保持回路を示すブロツ
ク図、第４図は、上記実施例切替装置の動作を説
明するためのタイムチヤート、第５図は、従来の
二重化システムの切替装置の回路ブロツク図、第
６図は、同従来の切替装置の動作を説明するため
のタイムチヤートである。
１，２：制御回路、３，６：切替器、４，７：
切替ロジツク、５：保持回路。
FIG. 1 is a circuit block diagram of a switching device for a duplex system showing an embodiment of this invention, and FIG.
FIG. 3 is a circuit diagram showing a digital holding circuit of the switching device; FIG. 3 is a block diagram showing an analog holding circuit; FIG. 4 is a time chart for explaining the operation of the switching device of the above embodiment; FIG. 5 is a circuit block diagram of a conventional switching device for a duplex system, and FIG. 6 is a time chart for explaining the operation of the conventional switching device. 1, 2: Control circuit, 3, 6: Switch, 4, 7:
Switching logic, 5: Holding circuit.
Claims (1)
受け、並列運転される第１と第２の処理装置と、
この第１と第２の処理装置のいずれかを出力する
第１の切替器と、この第１の切替器を介して出力
中の処理装置から自己異常信号を受け、他方の処
理装置から自己正常信号を受けていると、前記第
１の切替器を一方から他方に切替させる第１の切
替制御手段とを備えた二重化システムの切替装置
において、 出力中の処理装置が正常である時は、その処理
装置の現在出力値を保持する保持回路と、前記第
１の切替器からの出力か前記保持回路の出力のい
ずれかを出力する第２の切替器と、出力中の処理
装置が正常である時は、前記第２の切替器を前記
第１の切替器側に投入させ、出力中の処理装置か
らの自己異常信号で前記第２の切替器を前記保持
回路の出力側に投入させ、第１の切替制御手段の
切替出力に応答して、前記第２の切替器を再度、
前記第１の切替器側に投入させる第２の切替制御
手段を備えたことを特徴とする二重化システムの
切替装置。[Scope of Claim for Utility Model Registration] First and second processing devices each having a self-diagnosis function, both receiving the same input, and operating in parallel;
A first switching device that outputs either the first or second processing device, and a self-normalization signal that receives a self-abnormality signal from the processing device that is currently outputting via the first switching device; and a first switching control means that switches the first switching device from one side to the other when receiving a signal, when the processing device currently outputting is normal, A holding circuit that holds the current output value of the processing device, a second switching device that outputs either the output from the first switching device or the output of the holding circuit, and the processing device that is currently outputting is normal. At this time, the second switch is turned on the first switch side, the second switch is turned on the output side of the holding circuit in response to a self-abnormality signal from the processing device that is currently outputting, and the second switch is turned on the output side of the holding circuit. In response to the switching output of the first switching control means, the second switching device is turned on again.
A switching device for a duplex system, comprising a second switching control means for switching on the first switching device side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2066489U JPH02111802U (en) | 1989-02-23 | 1989-02-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2066489U JPH02111802U (en) | 1989-02-23 | 1989-02-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02111802U true JPH02111802U (en) | 1990-09-06 |
Family
ID=31237226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2066489U Pending JPH02111802U (en) | 1989-02-23 | 1989-02-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02111802U (en) |
-
1989
- 1989-02-23 JP JP2066489U patent/JPH02111802U/ja active Pending