Lenze 8400 BaseLine D - Manual (Page 146)

8 Diagnostics & error management
8.4 Logbook
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Lenze · 8400 BaseLine D · Reference manual · DMS 5.5 EN · 01/2014 · TD05
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8.4 Logbook
The integrated logbook function of the controller chronologically logs important events within the
system. The logbook is intended to support you in troubleshooting and controller diagnostics.
Events that can be logged
The following events can be logged in the logbook:
• Error messages of the operating system ( 153)
• Error messages generated by the application (via LS_SetError_1 )
Information saved
For each event, the following information is saved in the logbook:
• Type of response to the event (e.g. "Warning")
• Subject area that activated the event (e. g. "motor management/encoder").
• Event
• Value of power-on time meter
Memory depth
Maximum number of logbook entries: 8
8.4.1 Functional description
The structure of the logbook corresponds to a ring buffer:
• As long as free logbook memory locations are available, the ent-
ries will be saved to the next free memory location ().
• If all memory locations are occupied, the oldest entry () will be
deleted in favour of a new entry.
• The newest entries will always remain available.

Note!
In the event of a supply voltage failure, the logbook is saved and reloaded automatically
when the controller is switched on. This ensures that the error history of the device does
not get lost. For this reason it is very important to act with caution when deleting the log-
book entries.
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