No.1005 2008工作機械および関連製品特集 産業分野における「機械安全」の潮流 （安全の定性的評価から定量的評価へ） |
| カテゴリー | 資料 |
|---|---|
| 筆者 | 工作機械・メカトロ事業本部 メカトロ制御技術部 宮脇信芳 |
| 要旨 | In the machine safety field, the conventional EN954-1 1997 (former ISO13849-1) Safety of machinery general principles for design Part 1: Safety-related parts of control system has prescribed that a programmable logic controller(PLC) should not be used in safety related control system. On the other hand, as micro processor(MP)technology has remarkably progressed in recent years, safeguard devices using a microprocessor have been used or are going to be used in various industrial fields. This global trend has been triggered by International safety standard IEC615081), in which the conventional qualitative Machine safety standards were developed to quantitative safety standards. This international safety standard was in effect in 2000. After that, the safety system which employs MP like a safety PLC has been authorized by a third party certifi cate body and the safety device is being put in practical use in various fi elds. This report explains contents of IEC61508, the certification steps and the trend and future of function safety devices in FA fields including safety PLC which is JTEKT s products with IEC61508 certification. |
| キーワード | machine safety, safety standard, functional safety, SIL (safety integrity level), PFH (probability of failure per hour), dangerous fraction, state of the art |
| 関連リンク | 宮脇信芳：機械設備における安全制御の考察, JTEKT ENGINEERING JOURNAL, No.1004（2007）118. |
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