User Manual

Data Logger
10.1.2 LoggingBasedonChangedTagValue
To control sampling of data by other means than regular time interval, you have
to set up a separate tag to be used as a trigger. When the value of the trigger tag
changes the log item is logged.
10.1.3 MaximizingtheLifetimeofthe
StorageMedia
The storage media in the iX panel is based on Flash SSD (Solid State Drive).
Flash SSD has no moving or mechanical parts, which gives high and reliable
performance. The Flash SSD can handle data very fast and efficiently and the
data is controlled by the drive manufacturers’ confidential algorithm. A s the
algorithm is intellectual property it is not possible to calculate the lifetime, the
drive manufacturers only publish the numbers of reads and writes.
Best practice is to minimize number of writes to maximize the lifetime of the Flash
SSD.Followtheadvicebelowtoreducetheriskofprematurewearout(beforethe
estimated lifetime). A non working Flash SSD stops the panel from operating.
• Do not log values with higher accuracy than needed. For example, avoid
logging of floating point values.
• Reduce high fluctuating values by using the hysteresis functionality in the
connected controller.
• Collect values with high fluctuating values in the same logger and do not mix
with stable values. Collect slow changing values in other loggers.
• Do not log with higher refresh rate than needed.
• Disable logging completely when information is not needed, for example
when the machine is not r unning.
• Use default setting Log changes only in the property setting of the logger.
• Keep the log size to a minimum, as few rows as needed.
• Avoid extensive file writing when controlling storage via script.
10.2 AddingaDataLogger
A data logger can be added to the project from the Insert ribbon tab. The data
logger configuration pages are used to set up which values to log.
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