JPS639604U - - Google Patents
Info
- Publication number
- JPS639604U JPS639604U JP10376386U JP10376386U JPS639604U JP S639604 U JPS639604 U JP S639604U JP 10376386 U JP10376386 U JP 10376386U JP 10376386 U JP10376386 U JP 10376386U JP S639604 U JPS639604 U JP S639604U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- capacitor
- volatile
- control power
- power outage
- 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
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Static Random-Access Memory (AREA)
- Safety Devices In Control Systems (AREA)
- Programmable Controllers (AREA)
Description
第１図は本考案の一実施例を示す系統図、第２
図は本考案のメモリ保護動作を示すタイミングチ
ヤート、第３図は従来のプログラマブルコントロ
ーラの一例を示す系統図である。
１……プログラマブルコントローラ、２……中
央演算処理部、３……ＩＯバス、４……バスイン
タフエース、５……ＩＯモジユール、６……ＲＯ
Ｍ、７……ＲＡＭ、８……整流回路、９……バツ
テリ、１１……ＥＥＰＲＯＭ、１２……書込回路
、１３……不足電圧検出回路、１４……コンデン
サ。
Figure 1 is a system diagram showing one embodiment of the present invention;
The figure is a timing chart showing the memory protection operation of the present invention, and FIG. 3 is a system diagram showing an example of a conventional programmable controller. 1...Programmable controller, 2...Central processing unit, 3...IO bus, 4...Bus interface, 5...IO module, 6...RO
M, 7... RAM, 8... Rectifier circuit, 9... Battery, 11... EEPROM, 12... Write circuit, 13... Undervoltage detection circuit, 14... Capacitor.
Claims (1)
御電源の停電を検出する不足電圧検出回路と、停
電が検出されたとき上記コンデンサの充電電圧を
駆動電源として揮発性ＲＡＭ上のメモリ内容を転
記して保存するバツクアツプ用の不揮発性ＥＥＰ
ＲＯＭを備えたことを特徴とするプログラマブル
コントローラ。 A capacitor is charged by the control power supply, an undervoltage detection circuit detects a power outage of the control power supply, and when a power outage is detected, the memory contents on the volatile RAM are transferred using the charging voltage of the capacitor as the driving power supply. Non-volatile EEP for backup storage
A programmable controller characterized by being equipped with a ROM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10376386U JPS639604U (en) | 1986-07-08 | 1986-07-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10376386U JPS639604U (en) | 1986-07-08 | 1986-07-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS639604U true JPS639604U (en) | 1988-01-22 |
Family
ID=30976630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10376386U Pending JPS639604U (en) | 1986-07-08 | 1986-07-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS639604U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992014198A1 (en) * | 1991-02-05 | 1992-08-20 | Fanuc Ltd | Control device |
| WO2011099117A1 (en) * | 2010-02-09 | 2011-08-18 | 三菱電機株式会社 | Programmable controller |
-
1986
- 1986-07-08 JP JP10376386U patent/JPS639604U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992014198A1 (en) * | 1991-02-05 | 1992-08-20 | Fanuc Ltd | Control device |
| WO2011099117A1 (en) * | 2010-02-09 | 2011-08-18 | 三菱電機株式会社 | Programmable controller |
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