The AlarmLog table is in the database, and you will need to use database tools to query it. For instance, with a SQL Server database, you can use SQL Server Management Studio or sqlcmd to query the AlarmLog table.
In the PMU Connection Tester, you have filled in the TCP tab without defining an alternate command channel. This implies that you intend to transmit all frames over a single TCP communications channel. When you created your output stream, if you specified both a TCP Channel and a UDP Channel, then the openPDC will be expecting to transmit command frames and configuration frames over the TCP channel and data frames over the UDP channel. In that case, if you don’t configure the PMU Connection Tester to listen for data over the UDP channel, it won’t receive any data frames.