Rockwell Automation 1756-HIST2G Historian ME 2.1 - Manual (Page 291)

G • T ROUBLESHOOTING
281
Snapshot data points
displayed on the
Current Data
page
contain timestamps
that are not being
updated:
Check the status of Data Collection on the Home page.
Navigate to Time Source > Controller in the web interface.
Check for a message that indicates that data collection has
discarded data.
If Data Collection status is “Running”, check the Collection
Rate in the System Status section in the left navigation bar.

Ensure that the Collection
Rate is zero; this confirms
that Data Collection is not
collecting data.

Go to the Web Diagnostics
Firmware
tab, and check
the Data Sever page. N/A
indicates an error state.

Reboot the module.

If Data Collection stops
again, go to the Configure
Historian
tab, and click
Data Storage.
Ensure that
the Archive Disk Threshold
and Archive Usage Thresh-
old are still valid. If these
thresholds have been
reached, wait for the system
to process overflow events
and return to a state that
allows you to restart Data
Collection.

If the Collection Rate is not
zero, check the status of the
Data Server on the Home
page.

If the Point Server status is
“Stopped” or “Error”,
reboot the module.
If the Data Collection status is “Stopped”, go to the Data
Collection
page and restart Data Collection.
A single point has not
collected data for a
significant time
period:

Check the point configuration on the Point Property page.

Ensure that the scan rate is not set too low, and ensure that
the Exception and Compression values are configured
properly for the point.
Data Collection
Symptom Solution