Hello there, 

We have RTG Crane which have s7-300 PLC included with three simovert masterdrive vector   which are trolley, travel and hoist drive .

We are  facing system fault and bus fault when we want to put crane in ON MODE  , which is drive goes on , and the whole profibus system Loosing , the bus fault and system fault comes in the PLC , 

When we discunnect the input breaker of the HOİST DRİVE , the crane can be crane on without that faults . 

We changed ,Ivi, cuvc, trystors, PCC, PCO, capacitor , precharge resistor and it's board but still have the problem when want to go on crane on mode, 

Appreciate in advance 

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Split from Loss of Profibus connection with the driver.

Closed cause question posted twice.

The second thread with the subject Buss fault and system fault in s7_300 after drive goes on is published within the conference Decentral Peripherie.