Siemens Profibus SFC51

Hi all,

I have got a setup as shown in the attached picture. I am trying to detect state of the slaves, but only the IM153-2 shows up. How can I detect status of the slaves on the bus that is extended (PROFIBUS(1): Safety DP)??

Is that a redundant system, with the IM153-2 set up as a Y-Link? I haven't worked with those in a long time. The manual says WRREC & RDREC will work with the subordinate bus, but it doesn't mention anything about SFC51. Do the slaves have diagnostic data records you can read?

Take look at DPNRM_DG (SFC13) block - Reading Diagnostic Data of a DP Slave

Thanks guys I will check it out!