Hi All

i want your help in aproblem happening in CPU  416-2DP is used in RMH system in Meltshop 

This Cpu is connected to two branches of profibus 

one in X2-DP port and the the other to X1 MPI/DP port 

the system on   X1 DP/MPI port is cancelled from long time but we want to return it back

when we put this profibus cable in CPU it work ok but after day or more it make fault in CPU ( all lamps on it make red flash ) and this fault doesnot  disappear until remove  cable and CPU batteries and reset panel may be for many times

we test to update firmware of cpu from 1.3 to 1.4 by internet but problem still happened 

This profibus cable connect about 13 unit ( 9 PT100 + 4 Pressure transmitter )

PT100 data

Endress hauser

Model TST434-J1A3AG – TMT184-A

Pressure transmitter data:

Endress Hauser CERABAR M

Order Number: PMP41-RE13P8P11P1

When problem happened you cannot make any connection to cpu to make diagnostic buffer

i waiting your help thanks