2/19/2013 6:18 PM | |
Joined: 1/28/2009 Last visit: 10/11/2024 Posts: 6852 Rating: (1365) |
Hello, Tell us more about Back up batteries in your system: Backup battery (option)
Best regards Hamid Hosseini |
2/20/2013 11:46 AM | |
Joined: 1/28/2009 Last visit: 10/11/2024 Posts: 6852 Rating: (1365) |
Hello, My brief knowledge on PROFIBUS DP and mono-master configuration suggests me ,The master checks the slaves in its polling list after power up to establish.There are several checks and parametrization to be passed in initialization mode for a slave to be considered healthy from "Master"'s point of view. This checks can be done independent of main program execution because of high baud rate needs fast execution.DP section of CPU interrupts the OB1 when it senses a slave is missing and CPU can do it in its first execution cycle.I also suggest reading the following post: I wanna know when DP Slave has a failure - OB86As far as I know for redundant CPUs, you should call SFC51twice with 2 index value.Consult this manual for more help: System Software for S7-300/400 System and Standard Functions Volume 1 and Volume 2 If the problem is still persisting , ask "Support Request" for more help. Best regards Hamid Hosseini |
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