4/9/2020 12:54 AM | |
Joined: 9/27/2006 Last visit: 9/24/2024 Posts: 12282 Rating: (2685) |
Hello eshahbazi; The system diagnostics of the CPU recognizes basically 2 states for any fault message, entering and exiting. See the screenshot below, showing how OB 86 uses its local data to determine if a rack fault becomes active (entering) or disappears (exiting). Just for your information, this image comes from the System and Standard Functions manual; chapter 1 describes the Organization Blocks, including diagnostic OBs such as OB 86. https://support.industry.siemens.com/cs/ww/en/view/109751826 WinCC alarms use the same format to signal either the arrival of a fault in the PLC, or the removal of the fault. You can select one, both or none of these signals to trigger an alarm in your alarm display. It all depends what you want to log and the amount of alarms programmed in your WinCC system. Hope this helps, Daniel Chartier |
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