Profibus DB - Cable Redundancy

[mad4x4]

Ok here is the problem we have a Siemens DP PLC (Master) and RIO ( slave) at the end of a Fiber Cable that runs through a Slip ring via OLMs


What we want to do is provide provide Cable redundancy to this set up so that the primary route is Fiber through the slip ring with the back up route as a WIRELESS dateable PB link. What we want is a method of fail over so if the fiber fails we can fail over to the WIFI, but we also want diagnostics on the WIFI to prove the "backup" line is good.

Thought about using a PRS ( https://se.profibus.com/produkter/prs-profibus-dp-redundancy-switch but that seems to be for 2 masters....

Here is a "Simple Diagram" of what we want to Achivie

                                                    ..........                                            
[FONT="Courier New"]:...............:                              :        :                                           
:               :...........f..................:   SR   :...f....                                   
:               :                              :        :       :                ...............:  
:               :                              :........:       :                :              :  
: siemens       :                                               :................:   IO         :  
: (master)      :          .........                  ........  :                :              :  
:               :  <.......:       : . . . .  . . . . :      :..:                : ............ :  
:               :          :  DE   :                  : DE   :                                    
.................          :.......:                  :......:          

KEY
-------
DE = DataEagle (CU)
SR=  Slip Ring (Fiber)
IO=   Remote IO

f = Fiber OLM connection
[/FONT]

 

[Ken Moore]

Have you asked Siemens about using the standard redundancy module that would be used with two CPU's? One side fiber, one side wifi. Not sure if you can use it with one CPU.