Rockwell Automation FactoryTalk View Machine Edition Users Guide - Manual (Page 527)

26 • Set up data logging
26-3
•
•
•
• •
Each data log model has a unique name, and an optional description.
You can log a maximum of 1,000,000 points for version 7.00.00 or later, and you can log
300,000 points for release versions earlier than 7.00.00. The default is 1000. When the
maximum number of data points have been logged, the oldest data is deleted to make
room for the new data.
Data storage locations
You can store data log files in any one of these locations:
 On the run-time computer
 On another computer on the network
 On a compact Flash Card (for PanelView Plus or PanelView Plus CE terminals only)
If the logging destination is unavailable for any reason, for example, the card is removed
or the network drive becomes unavailable, data logging stops. It does not restart until you
restart the application.
Log to a network location
To log data to a network location, the network drive must be shared, and the run-time
computer must be logged in to the same domain as the computer on the network. To do
this, the user must have access rights for the domain.
The PanelView Plus or PanelView Plus CE terminal cannot be part of a domain. However,
you can verify that the user who is logged into the PanelView Plus or PanelView Plus CE
terminal is on a user list that is part of a domain.
For more information about logging in to a Windows domain or authenticating users, see
page 17-1.
Data logging methods
There are two methods for triggering data logging. You can set up logging so tag values
are logged:
 Periodically (periodic logging)
 Only when a tag value changes (on-change logging)
Log periodically
Periodic logging is used to take a snapshot of all tag values at a particular point in time.
Tag values are logged even if there has been no change.
You cannot change the periodic log rate at run time.