Redundant configuration with S7300 work db status bit (station is master) not changing

Hello Everyone,

I build a redundant configuration project using help from the example project in step7.

I haveno SF or BF and when i manually switch any of the PLC to stop the IM153 ACT LED switches over respectively.

My prblem is i will like to use the bit from the work DB5 (DB5.DBX9.1) from both CPU's to tell the OS who is the master and reserve.

I have attached a screen shot of the VAT table showing the bits in the work DB5. This is the shot when Redundancy Safety PLC1 is master. you will notice that the both PLC is showing that it is master (DB5.DBX9.0 = 1).

Thanks for all your help,

Raymondk....

Thank you H-H,

I have recheck all the steps as you suggested and also did the download however i am still getting same status of DB5 with the Redundant-backup link has failed.
I notice when i switch the CPU's the DBX9.0 =0 and DBX9.1= 1 then it switches back to 1 and 0 respectively. this happens on both CPU's.

This time i attahced the program. It will be helpfull if you can look over. You maybe able to see something that i overlooked.

Thank you onces again.

Raymondk.