Dear All,

               I am working with S7-400 & ABB's Imcc M-Link on profibus.

               All profibus communication ok with consistent  data reading 244 & writing 124 byte.

               I have to read more data as per client requirement. 

               How it is Possible?

               As per ABB people, it should be possible via acyclic data transfer..

               Fallowing information had given in ABB's document.

                           Example 1:

                             Slot number = 8; Index number = 0; Length = 54

                             From MControl 8 the following data is read:

                            “Current Phase L1 [A]” until “Time to Trip [sec]”

                       Example 2:

                                 Slot number = 27; Index number = 54; Length = 6

                                From MControl number 27 the following data is read:

                                “MStart insertion cycles [n]” and “Starter State”

             Which SCF/SFB can be use for this asyclic communication? I did not get any  SFC/SFB with this parameter.

                                it is feasible to read data for  50 slots  from each slave.

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Split from MNS-iS, not able to read & write consistent data

Can you please send me your hardware configuration with S7-400H

I cant manage to add redundant M-Link to hardware...???