6/30/2008 8:24 PM | |
Joined: 12/20/2005 Last visit: 7/12/2023 Posts: 79 Rating: (4)
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Gabe, I suggest you review the QUADLOG Safety Manual for information on fault detection: "The system responds to detected faults depending on architecture and user configuration. A 1oo2D architecture will degrade to 1oo1D when a fault is detected in one unit. A 1oo1D architecture may be configured to display the error condition or automatically shutdown when a fault is detected. (See section 6.7, Shutdown Logic) Automatic shutdown response time includes fault detection time plus one CCM scan unless the safety instrumented function has all I/O within one CDM module in which case the CDM module responds within 25 ms of fault detection time." http://support.automation.siemens.com/WW/view/en/23447258 |
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