![background image](http://html1.mh-extra.com/html/omron/nt-series-support-tool-for-windows-v4/nt-series-support-tool-for-windows-v4_operation-manual_744237265.webp)
6-9
Section
Graphs
249
If the 100% value, 0% value, and –100% value are set using numeral memory
table entries as indicated below, the percentage value of the reference value is
calculated according to the value stored at the specified address.
Numeral memory
table
0
1
2
3
4
5
–2000
0
3000
The data logging function and background function can be used with the NT21,
NT31, NT31C, NT631, and NT631C.
Data logging function
The data logging function records the values used for display at a PT.
Usually, the data collected in sampling for display in a trend graph are not re-
corded internally. If you use the data logging function, the data are logged and
can be displayed by tracing them back.
The data logging function can be executed for up to 8 kinds of data.
Background function
The background function continues data sampling even when a trend graph is
not displayed.
With a trend graph, data sampling is executed only when a trend graph is dis-
played and stops when the screen is switched from the trend graph screen.
However, if the background function is used, data sampling can be continued
in the background mode (while the trend graph is not displayed). The data
sampled and logged when in background mode can be displayed by tracing
back to the past.
The background function is valid only when it is used with the data logging
function; when the background function is used, the objective data is continu-
ously recorded. Please note that since data sampling is executed continuously
if the background function is used, the processing speed at a PT may be a little
slow.
How the data recording is changed depending on whether or not the data log-
ging function and the background function are used is shown below. Regard-
less of the use of these functions, the trend graph element always starts draw-
ing a graph from the initial state when the screen is changed to the trend graph
display screen.
<Without logging and background functions>
Trend graph screen
Switching
the screen
Other screen
Returning
Trend graph screen
(starts drawing a graph newly)
Data not logged
Summary of Contents for NT-SERIES - SUPPORT TOOL FOR WINDOWS V4
Page 1: ...Cat No V061 E1 06 Support Tool for Windows Ver 4 NT Series OPERATION MANUAL...
Page 2: ......
Page 3: ...NT series Support Tool for Windows Ver 4 j Operation Manual Revised July 2010...
Page 4: ...iv...
Page 6: ...vi...
Page 14: ......
Page 80: ......
Page 94: ......
Page 338: ......
Page 422: ......
Page 458: ......
Page 478: ......
Page 502: ......
Page 508: ......
Page 532: ......
Page 556: ......
Page 560: ......
Page 562: ......
Page 564: ......
Page 570: ......
Page 572: ......
Page 584: ......
Page 590: ......
Page 592: ......
Page 593: ......