Weidmuller GPRS Alarm Unit - Manual (Page 67)

Configuration
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4.12 Logbook
The IE-GPRS-I/O manages a logbook where important events,
messages etc. are entered.
Max. 255 entries are possible. If this number is exceeded, the oldest
entries are overwritten. The entries can be viewed and deleted under
the menu option "Logbook". Normally, the log file need not be reset.
The entries are displayed in the form "Weekday", "Date", "Time",
"Event" and "Error code".