IEC 101 protocol with simulator

IEC 101 protocol with simulator

Hi,
I configured IED variables in IEC 101 protocol and used IEC60870-5-101 sever simulator to test the IED open and close using command processing.

When , i try to close/open the Circuit breaker, SBO rejection is occurred. The observation in diagnostic viewer is attached.

Kindly help me to solve this issue.‚Äč