When you dial a remote modem using U90 Ladder, a window opens up in the bottom of your screen. The log of events is quickly displayed in this window.
The log also appears during download and upload if there are communication problems.
This log is stored as a .txt file. You can view this log by navigating to Unitronics\U90_Ladder\U90Ldxxx and opening a file named ComLog.txt.
In this file, the most recent log of events appears last.