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We have a Siemens 135U using an IM308-C as master of a profibus network that contains 2 OP17. Siemens gave us a FB58 to do the interface between the IM and the OP's and a DB (DB-ZU) where we define 2 DB's that will serve as areas of interface. The problem is that only one OP is working.Each group of 16 words of DB-ZU is for a specific equipment.We are using the 4th and 5th group for the 2 OP's.The OP that has assigned the 4th area is the one that works.If we change the assignment then it's the other one that works.Never the two at the same time as it should be. Can somebody help us on this one?