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SW Redundancy, How to enable CPU A as master at start up

11/2/2008 5:11 AM	Rate (0)
Rockon Bronze Member Joined: 11/2/2008 Last visit: 11/1/2025 Posts: 95 Rating: (1)	Hello Everybody!! I am having SW Redundancy system with 2 CPU-315-2DP and WinCC 6.2 All system is working fine like data transfer during the swichover But when switching power on, CPU-B becoming master CPU How to configure CPU-A as master during start up, because in WinCC I have considered CPU-A as master

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11/4/2008 6:35 AM	Rate (0)
john Enthu Posts: 69 Rating: (0)	Dear ROCKON, you mean second IM-B is getting activated in place of first IM-A at power up. Also, you mean MPI address-2 is CPU-A and MPI address-4 is CPU-B. in this case, just interchange the MMC in CPU-A and CPU-B. power on the panel and then you will get MPI-Address-2 will be your master. please, note that in this case also, you will get second IM will be in active mode. but now, you will get the connection of Wincc with MPI-address-2 at the power start up. if your case is different then what i understood, then let me know the details.......... regards............
john Enthu Posts: 69 Rating: (0)
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11/4/2008 10:51 AM	Rate (0)
Rockon Bronze Member Joined: 11/2/2008 Last visit: 11/1/2025 Posts: 95 Rating: (1)	Thank you John Enthu for your help In my configuration CPU-A = MPI Address 2 CPU-B = MPI Address 4 If I changed MMC cards will MPI addresses also change. Does this makes sure that CPU-A(MPI address 2) will always start at startup I am also facing one problem with WinCC Whenever I am switching PLC through control bitDB 5. DBX10.0, WinCC dosen't switches So it doesn't allowsme to change valuesin WinCC

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11/4/2008 12:41 PM	Rate (0)
john Enthu Posts: 69 Rating: (0)	Dear Rock on....... that's is confirm..........you will get MPI address-2 as master. in Wincc, if you have configured redundancy, then no need to change the program. above exercise will solve all of your problems........... regardss..............
john Enthu Posts: 69 Rating: (0)
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11/4/2008 2:19 PM	Rate (0)
Rockon Bronze Member Joined: 11/2/2008 Last visit: 11/1/2025 Posts: 95 Rating: (1)	Thank you Very much

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5/22/2009 8:43 AM	Rate (0)
Gaurav Kharadi Posts: 14 Rating: (1)	Dear Rockon, Is your problem solved? with regards Gaurav H. Kharadi
Gaurav Kharadi Posts: 14 Rating: (1)
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6/2/2009 10:03 AM	Rate (0)
Khaled_Ezzat Gold Member Joined: 9/7/2007 Last visit: 4/3/2025 Posts: 550 Rating: (62)	Hi Rockon usually CPU A starts after CPU B so CPU B starts as master if you want to exchange power on CPU A the power On CPU B. Best Regards
	Best Regards
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6/3/2009 5:37 AM	Rate (0)
Gaurav Kharadi Posts: 14 Rating: (1)	Dear Khaled, I tried it by swaping CPU powers. But the result was same. I also tried by swaping IM 153-2 power. But no progress. When I open NetPro and Look for Master system on IM 153-2 Redundant, it shows master system Profibus-2 with ID-1. I think this may be the cause. Thanks Gaurav H. Kharadi
Gaurav Kharadi Posts: 14 Rating: (1)
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