Siemens OSM Bedienungsanleitung PDF herunterladen (Seite 33)

Important OSM/ESM Functions

2-13

Industrial Ethernet OSM/ESM Network Management

C79000-G8976-C137-08

2.11 Time of Day and Time-of-day Synchronization

The OSM/ESM has two times:

1. System Up Time:

The time since the OSM/ESM was last restarted. The system up time is added

to every E-mail and every entry in the event log table. After 497 days, the

system up time starts again at 0. This oberflow results from the range of values

of the standard MIB object (OID 1.3.6.1.2.1.1.3).

2. Date and Time of Day:

The date and time of day can be set on the OSM/ESM either manually using a

CLI command or automatically using SIMATIC time-of-day frames. Once the

date and time of day have been set after restarting the device, the date an

time-of-day information is added to E-mails and every event in the event log

table. The date and time of day are NOT buffered if the device is turned off.

The OSM/ESM evaluates the cyclic multicast frames of a SIMATIC time

transmitter and sets the date and time of day accordingly. This allows an absolute

time to be assigned to reported events.

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Siemens OSM Bedienungsanleitung Seite 33