[foxboro] ET200S with MG30

Hello: 

We had a MG30 communicating with 2 Siemens PLC through BlackBox RS-232 to 
RS-485/422 converters model IC108A. 
There were 3 x IC108A ? one at MG30 side and the other 2 at the PLC side (one 
at each PLC). 

Everyhting worked ok; however we had to upgrade one PLC and replaced one of the 
BlackBox IC108A by a ET200S ModBus/ProfiBus module.

After that we started to have problems w/ communication: 

If we connect bus A and B we have no communication w/ both PLCs. 
If we disconnect Bus A we have communication w/ both PLCs but we have an alarm 
in Bus B in one of the PLCs. 
If we disconnect Bus B we have communication w/ both PLCs but we have an alarm 
in Bus A in one of the PLCs. 

We would like to know if: 

- someone has experience w/ ET200S that could be useful in this case.  
- has a manual of ET200S (Siemens does not have it at the web) that could be 
sent to us. 

Thanks in advance 

ELIDIO Diniz




 
 
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