Rockwell Automation 1756-HIST2G Historian ME 2.1 - Manual (Page 295)

G • T ROUBLESHOOTING
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If Data Collection is
running on one or
more modules and
these modules are
transferring data to a
FactoryTalk Historian
SE, the FactoryTalk
Historian SE will
experience a large load
and overflow events if
Data Transfer is
stopped for some time
and then restarted:
To minimize the load and number of overflow events on the
FactoryTalk Historian SE, go to the Configure Historian tab.
On the Data Transfer page, reduce the Maximum Events per
Transfer value. This parameter controls the number of events
transferred.
If Data Transfer and
Data Collection are
running on one or
more modules, and
Data Transfer is
stopped and then
started on one module
after some time has
passed, the module
may experience data
interruption:

Restarting Data Transfer on the module may cause data
interruption because old timestamps cannot be written to
the current archive.

After it is restarted, ensure that Data Transfer remains run-
ning so that transferred events eventually match the archive
event timestamps.
Data Transfer
Symptom Solution