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SOFTWARE REDUNDANCY NOT WORKING

Created by: patel at: 1/9/2013 11:35 AM (14 Replies)

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1/9/2013 11:35 AM	Rate (0)
patel Posts: 134 Rating: (2)	Dear all, i am first time working with software redundancy in S7-300. In brief about project, CPU:CPU 313C-2DP 6ES7-313-6CG04-0AB0 IM 153-2 REDUNDANT BUNDLE WITH IM/IM BUS CONNECTOR 6ES7 153-2BA02-0XB0 MPI :REDUNDANT LINK CPU A MPI ADDRESS:2 CPU B MPI ADDRESS:3 DP SLAVES: 2nos.( ET 200M) ON DP link..one has DP address: 3 and other has DP address:4 Herewith i attched my S7 project.Please have a look to it and suggest me solution. Please look into hardeare configuration and also in OB100 in which i have written CALL OF FC 100 'SWR_START' FOR INITALISATION ... I think i may miss something in these parameters..I have used all blocks from SWR_300_MINI example which comes with library.. Differences between example and my project: 1) Example has only one DP slave. I have two dp slaves. So please tell me In FC100 do i need to change anything for this. I try to change SLAVE_LEN parameter to 2 but it didnt work.. 2)Example has only one 8 DO module where as i have one 32 DO in one slave and other 16 DO in other slave. ADDRESSES: ( 0 TO 5 continuous) So if i want to configure all these outputs as redundant outputs,do i need to change anything in FC100 .. because right now if i switchover from one CPU to other, i can see a small flickering in output channel LED from module..I tried to change PAA_LAST parameter to 5 as per my hardware configuration but it didnt work and i got SF on CPU.PAA_FIRST i kept to 0. 3) If i read manual for software redundancy, it says redundancy logic FC100 should be written in cyclic interrupt( ie:OB35) but in libary example , it is written in OB1..So what is right..? Please have a look in my project as well as my description above and guide me asap.. Attachment SOFT_REDUNDANCY.zip (327 Downloads)
patel Posts: 134 Rating: (2)
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1/9/2013 1:51 PM	Rate (0)
Jazz_M Gold Member Joined: 9/6/2008 Last visit: 5/7/2022 Posts: 1121 Rating: (86)	Hi , Well i went through the program that you had attached please find the below comments. 1. In OB100 of CPU A see the Slave_Len - Specifies the no of DP moduels that u have in your project. in our case it is 2 2. In OB1 you have called the S5 timer in R system you can use only IEC timers and not S5 timers and counters 3. YOU have not used any CP card & you have given a Based address of 256 in OB100 for FC100 - Laddr 4. you have used memeory bit address in FC1, Please restrict the use of meomory bits in R system. Please correct the above and check the system. Regards
	Jazz
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1/10/2013 6:11 AM	Rate (0)
patel Posts: 134 Rating: (2)	Hi dear.. Thnx a lot for quick response.. 1) I tried to change DP slave to 2 but it is not working..I will try again..But it is confirm that i need to make SLAVE_LEN to 2 if i have two slaves..am i right? 2)s5 timer i already removed..it is just i was doing some trial thats why it was there..But i try with IEC timer SFB4 and i have used inst. DB 111for this timer. Now i have written IEC_NO as 111 and IEC_LEN as 1...am i right..?but it is not working.. 3)If i have not used CP card then what data i have to put in base address of CP in LADDR in FC100.. 4)if i can not use m bits then how to write program..Means use of m bits or m memory is not allowed or due to some reason we should not use it..and if we should not use it then how can we write logics in fb/fc...
patel Posts: 134 Rating: (2)
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1/10/2013 6:35 AM	Rate (0)
patel Posts: 134 Rating: (2)	Hi dear.. 1) I tried to change DP slave to 2 but it is not working..I will try again..But it is confirm that i need to make SLAVE_LEN to 2 if i have two slaves..am i right? Now this point is ok..I changed to SLAVE_LEN to 2 and it is working ok.. Also please confirm my following doubt from my first conversation.. 2) Example has only one 8 DO module where as i have one 32 DO in one slave and other 16 DO in other slave. ADDRESSES: ( 0 TO 5 continuous) So if i want to configure all these outputs as redundant outputs,do i need to change anything in FC100 .. because right now if i switchover from one CPU to other, i can see a small flickering in output channel LED from module..I tried to change PAA_LAST parameter to 5 as per my hardware configuration but it didnt work and i got SF on CPU.PAA_FIRST i kept to 0.
patel Posts: 134 Rating: (2)
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1/10/2013 9:31 AM	Rate (0)
Jazz_M Gold Member Joined: 9/6/2008 Last visit: 5/7/2022 Posts: 1121 Rating: (86)	patel Hi dear.. 1) I tried to change DP slave to 2 but it is not working..I will try again..But it is confirm that i need to make SLAVE_LEN to 2 if i have two slaves..am i right? Now this point is ok..I changed to SLAVE_LEN to 2 and it is working ok.. Also please confirm my following doubt from my first conversation.. Yes Your correct [quote user="patel"2) Example has only one 8 DO module where as i have one 32 DO in one slave and other 16 DO in other slave. ADDRESSES: ( 0 TO 5 continuous) So if i want to configure all these outputs as redundant outputs,do i need to change anything in FC100 .. because right now if i switchover from one CPU to other, i can see a small flickering in output channel LED from module..I tried to change PAA_LAST parameter to 5 as per my hardware configuration but it didnt work and i got SF on CPU.PAA_FIRST i kept to 0. Check your program if you have used any S5 timers, or counters. Do not use any memeory bit, Regenrate the DB5 instance of FB101, If the Flickering of the DO is there then the redundancy is not gud. You need to check your program in FC100. In your program change all the memeory bit used in the redundant Program to MW 10 and higher. and declare the redudant memeory bit as 0 t0 3 and do not use any. Check the program.
	Jazz
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1/10/2013 10:23 AM	Rate (0)
patel Posts: 134 Rating: (2)	Hi dear.. Thnx for your help.. Now my most issues solved..Now i can check few basic things regarding redundancy. I have used one IEC TON timer with 30s time. I start timer from one CPU and after few seconds( 10-15 sec) , i switchover to other cpu. But my output gets on after 30 sec only. So i can judge my redundancy is working ok..am i right..? But this is very basic things..Now i want to know hoe can i wrote program in redundancy program..? Also i am really sorry but i could not understand your above answer.If you can simplify it for me it will be good for me... I have used menory bits from m20.0 and so on for logic..and in FC100 , i have used MB_NO=20 and MB_LEN=10..that means i can use mB20 TO MB30 as redundant memory...am i correct? How to regenerate instatnce of DB5.. Also plese explain me the exact use of PAA_FIRST and PAA_LAST parameters of FC100...How to use them in redundancy? I have attached latest backup of my project. Attachment redundant.zip (269 Downloads)
patel Posts: 134 Rating: (2)
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1/11/2013 9:00 AM	Rate (0)
Jazz_M Gold Member Joined: 9/6/2008 Last visit: 5/7/2022 Posts: 1121 Rating: (86)	patel Hi dear.. Thnx for your help.. Now my most issues solved..Now i can check few basic things regarding redundancy. I have used one IEC TON timer with 30s time. I start timer from one CPU and after few seconds( 10-15 sec) , i switchover to other cpu. But my output gets on after 30 sec only. So i can judge my redundancy is working ok..am i right..? But this is very basic things..Now i want to know hoe can i wrote program in redundancy program..? Also i am really sorry but i could not understand your above answer.If you can simplify it for me it will be good for me... I have used menory bits from m20.0 and so on for logic..and in FC100 , i have used MB_NO=20 and MB_LEN=10..that means i can use mB20 TO MB30 as redundant memory...am i correct? How to regenerate instatnce of DB5.. Also plese explain me the exact use of PAA_FIRST and PAA_LAST parameters of FC100...How to use them in redundancy? I have attached latest backup of my project. Hi well answer to your first point is 1. Yes the redundancy is working. 2. The PAA_First and PAA_Last represents the Redundant ouput Byte. You will have to enter the value as 0 to 5 as per your hardware configuration. 3. Delete the DB5 and regenerate by right click in the block folder & select the option Create DB. In that select the Option Instance and select the FB No 5 and click ok. 4. For the reduancy program you will have to use only IEC timers and counters. You should not use large anount of Memeory bit used shared DB for internal usage. 5. The Instace DB of your user program should be in order of sequence. Call the FC's in which you have made your program as reudandant program in OB1 in between the FB101. Do the same in other CPU. Have fun...
	Jazz
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1/24/2013 7:31 AM	Rate (0)
patel Posts: 134 Rating: (2)	2. The PAA_First and PAA_Last represents the Redundant ouput Byte. You will have to enter the value as 0 to 5 as per your hardware configuration. i tried to change my output bytes to 0 to 5 but it is not working...i know it is strange but it is happening like this only..when i change to output byte no from 0 to 5, and when i switch over from one CPU to other, my cpu switch to stop mode. I dont know why it happens like this..if i keep my output bytes no from 0 to 3 then it is working ok..
patel Posts: 134 Rating: (2)
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1/25/2013 10:24 AM	Rate (0)
Jazz_M Gold Member Joined: 9/6/2008 Last visit: 5/7/2022 Posts: 1121 Rating: (86)	Hi It Strange, It may sound absurd but change the 16 DO module to 32 Channel as in the first rack. and check the same. that means your address shall be from 0 to 7. Havefun...
	Jazz
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1/25/2013 1:26 PM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 1/15/2025 Posts: 3029 Rating: (1058)	Hello patel just to make sure we don't miss the obvious thing: Can you confirm that you delete "DB_WORK_NO""DB_SEND_NO" and "DB_RCV_NO"online after youmade changes to FC100 and before you start up the CPU's again? Have a look too at chapter 5.8 of the SIMATIC S7-300/S7-400 Software redundancy for SIMATIC S7 manual which states: The data blocks detailed above are generated once only by FC 100 'SWR_START' at startup and with the required length. After changes were made to the parameters of FC 100 'SWR_START', it is usually required to edit the data blocks as well. For that reason, delete all the old data blocks so that new data blocks of the required length can be generated at startup. Malfunctions can occur if you make changes to the parameterization of FC 100 'SWR_START' and do not delete the data blocks. I hope this helps
	Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
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