Thanks a lot michael

thats the right schematic i am using can u see any problem in the looping. It work good but some time garbage data in recieved in any two of the sub nodes i cant find and sol for this.

One more help i would like to know how to insert the diagaram in the text messege of this forum because i tried to copy paste but does not work else i could have posted the ckt erlier.

Thanks Again
Santanu