Lufft 8511.EAK, Руководство по эксплуатации

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Manual LCom
Page 76 of 158
e) Read the resultsTable
–
dataStore.queryResultsTable.queryResultsEntry.rowMeasureT
ime.x
will provide the UTC timestamp of the measure values reported by the
corresponding
dataStore.queryResultsTable.queryResultsEntry.rowValues.x
OID.
f) Clear the result set (and query parameters) by writing a value of 7 (done) to
the
dataStore.queryCommandAndStatus.0
OID.
rowValues is an OctetString
– containing one 32bit (signed or unsigned, depending
on the corresponding sensor OID entry) integer value for each OID reported in the
historySensorOidTable
– in exactly the same sequence as the sensor OIDs in above
table.
If data for a longer time period, or with a different reporting interval (greater than the
store interval of 1 minute) should be reported, the following sequence of SNMP
requests can be used:
a) Read the historySensorTable (i.e. read the number of entries in the
historySensorTable via
dataStore.numHistorySensorEntries.0
, and
then read the entries). The sequence of these OIDs will be used in the
resultsTable to report the respective oid values.
b) Write the desired value for the reporting interval (if data should be reported in
an interval > 1 minute) to the
dataStore.reportingInterval.0
OID.
Valid values are:
1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 30 or 60 minutes.
c) Write the desired start timestamp to the
dataStore.queryStartTime.0
OID. The rpu stores data up to 1 year
– so the timestamp might not be more
than one year in the past!
d)
Write a value of “2” (runQuery) to the
dataStore.queryCommandAndStatus.0
OID
e) Read the
dataStore.queryCommandAndStatus.0
OID until the status
changes from 2 (runQuery) to another value. The resulting value indicates
weather the query was successful or not. A value of 3 (dataReady) or 4
(dataPartialReady) indicates the query was successful, and the result is
provided in the queryResultsTable