Issue
When purging alarm in AMT, and the I/O server is configured as serial port communication, there will be "No Reply" window popping up and Retry is useless.
Environment
I/NET
Cause
This may be caused the network communication issue. Or it may be due to other issues.
Resolution
Disconnect the Server from network or disable the serial port in I/O configuration. After the alarms are purged, return to the original setting.