Safety engineering
Error management
Logbook function in the controller
1
104
EDS94AYAE EN 6.0
1.7.2 Logbook function in the controller
Error states are saved in the logbook of the standard device. The following is entered:
ƒ Type of response (e.g. trouble, warning, or information) to the event
ƒ Date/time (in case of memory module with real−time clock)
ƒ 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 SM301
For diagnostic purposes, a simple logbook with ten entries is implemented in the
SM301 V1.4. Here, changes regarding the request of safety functions in the SM301 are
logged. The basis for the logbook is the bit−coded log state generated in a 2−ms cycle. A
logbook is generated every time the log state changes.
ƒ The logbook function can be controlled via the "Log function" (C15891).
– The parameter can be written without using the safe parameter setting interface.
ƒ 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).
Codes
Parameter: Name: Data type: Index:
C15890 Current time
UNSIGNED_32 8685
d
= 21ED
h
Relative time for use in logbook.
Display area
(min. value | unit | max. value) Information
0 ms 4294967295
(From SM301 V1.4)
þ Read access o Write access o Controller inhibit o PLC-STOP o No transfer
C15891 Log function
UNSIGNED_8 8684
d
= 21EC
h
Setting of the logging behaviour (trigger condition). (From SM301 V1.4)
Selection list Information
0 Logging is active Logging is always active.
1 Logging is stopped Logging is switched off.
2 Stop logging in case of error Logging is stopped if an error occurs.
3 Stop logging in case of STO Logging is stopped if STO occurs.
4 Stop logging in case of SS1 Logging is stopped if SS1 occurs.
5 Stop logging in case of SS2 Logging is stopped if SS2 occurs.
þ Read access þ Write access o Controller inhibit o PLC-STOP o No transfer
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