OMRON CHAPTER 11 – Data Logging
Release 2.0 Page 179
Sample Rate
The sample rate options are used to determine how data will be recorded, select either on change or
on interval. The default is interval.
When the On Change option is selected data will be logged only when the value actually changes.
This ensures all transient information is logged - even if changes occur faster than maximum sample
rate, and also ensures periods of inactivity do not generate duplicated data.
The On Interval sample rate option enables the data values to be logged at regular intervals. Enter
the interval as a number and from the pick list select the form, e.g. ‘5 Second’. This method
guarantees the value is checked and recorded at every interval. However transients occurring
between sample periods are not recorded, which depending on the application may be a benefit.
Scale
The scale fields enable the graph upper and lower limits to be set and a scale label entered for the
selected item.
Enter the Minimum value as the lower limit to be shown on the graph for this item.
Enter the Maximum value as the upper limit to be shown on the graph for this item.
Enter the Scale Label to be displayed. This is a text field the contents of which are displayed by the
Y scale of the graph. The entry should be kept short but also be logical for clarification.
Editing Items
Copy, Cut, Paste Options
The Copy, Cut and Paste options follow the windows convention and enable a selected Item to be
copied or cut from one Data Set Group and then pasted into another. As Item names within a Data
Set must be unique, when a copied Item is pasted back into the same Data Set the name is given a
numerical suffix.
New or existing Items can be renamed and have their parameters edited by high lighting the Item and
then selecting the Edit option from the popup menu. When the Modify Item dialog appears edit the
appropriate parameters in the normal way.
Adding/Renaming Groups
The adding or renaming of Data Set groups follows the windows convention. New Groups are added
by selecting the Data Set to which the group is to be added and then selecting the Add Group option
from the popup menu. The new Group is automatically placed in the correct position in the Data Set
and given a default group number. New or existing Groups can be renamed by first high lighting the
current group name and then selecting the Edit option from the popup menu. When the edit box is
displayed the name can then be edited in the normal way. A maximum of 26 characters is allowed.
Unwanted groups can only be Deleted, they can not be cut and pasted.
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