3/20/2008 11:23 PM | |
Posts: 2661 Rating: (279) |
You can do this by using SFC 87: "C_DIAG". When the H system changes state, the connections to the standy will be broken and this can be detected by SFC 87. Please see the Standard Functions manual for SFC 87 block description and also the FAQ's below: SFC 87 ascertains the connection status for S7 41x-4H CPUs http://support.automation.siemens.com/WW/view/en/5950680 Sample program: reading out the operating state and status of an H system http://support.automation.siemens.com/WW/view/en/22919213 |
Follow us on