How to test – start the TwinCAT 2 master to 
run (4/4) 
   OBSERVATIONS 
    EtherCAT master view: 
Inside the EtherCAT master 
online state you see the 
queued frames counting up, 
the connected slave and its 
PREOP state. 
    EtherCAT slave view: 
The PREOP-state of the 
slave is indicated within the 
TwinCAT system manager . 
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