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TMDSCNCD28388D: EtherCAT Communication is halted, when the last slave controller of the total 6 slave controller

Part Number: TMDSCNCD28388D
Other Parts Discussed in Thread: TMS320F28388D

Hi Master.

I am developed Motor Control Drive board using EtherCAT based on the TMS320F28388D, 

the CPU1 control the motor, and EtherCAT is allocated to CM.

EtherCAT Master Program is TwinCAT3.

EtherCAT Slave Source is created from SSC.

The 6 ea Motor Control Driver is connected to TwinCAT3.

when the end of the Motor control Drive's cable is unconnected, TwinCAT3 and the other Drive communication is halted.

As i know, the other drive communication is normally operating, except the end Drive.

is there on option(example.  the communication sync) in the source code, which is generated from SSC ?

thank you.