Safety engineering
Error management
Logbook function in the controller
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EDS94AYAF EN 1.0
1.7.2
Logbook function in the controller
Error states are saved in the logbook of the standard device. The following is entered:
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Type of response (e.g. trouble, warning, or information) to the event
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Date/time (in case of memory module with real−time clock)
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Value of the power−on time meter
The available logbook entries can be displayed in the »Engineer« when an online
connection has been established.
The list of the error entries can be found in the appendix.
1.7.3
Logbook function in the SM302
For purposes of diagnostics, a simple logbook with ten entries is implemented in the
SM302. Changes with regard to the request of safety functions in the SM302 are logged.
The bit coded log status created in a 2−ms cycle serves as a basis for the logbook. A logbook
entry is generated when the log status has changed.
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The logbook function can be controlled via the "Log function" (C15891).
– The parameter can be written without using the safe parameter setting interface.
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A logbook entry consists of the two corresponding subcodes of the parameters "Log
time" (C15892) and "Log state" (C15893).
Note!
Before the display parameters of the logbook are read for diagnostic purposes,
the logbook function should be stopped in order to prevent inconsistency
(C15891 = 1).