400
Graphs
Section 7-10
S
Differences in trend graph display method according to percentage values
The display method of a trend graph differs according to the percentage value
range.
(1) When the percentage value is negative
The following happens, depending on the setting for “Display Sign”:
- No check mark:
The graph line is displayed as 0% (“Display %” is
shown in negative value).
- Check mark:
Displayed in the minus range
(2) When the absolute value of the percentage value is in the range of 100% to
999%
If the percentage value enters the range 100 to 999% or
−
100 to
−
999%,
and the line projects out of the graph area, only the part of the line inside the
graph area is displayed.
If a check mark is set for “Display %”, the calculated percentage value is
displayed.
Latest data
−
300%
100%
−
100%
0%
Latest data
50%
(3) When the absolute value of the percentage value is greater than 1000%
If the percentage value exceeds 1000% or enters the range below
−
1000%
and the line projects out of the graph area, only the part of the line inside the
graph area is displayed, as in (2) above.
If a check mark is set for “Display %”, the percentage value is displayed as
follows.
- “
∗∗∗∗
%”
S
Data logging function and background function
The data logging function is a function for recording (logging) the displayed val-
ues internally.
Normally, the data sampled for a trend graph is not recorded internally, but by
using the data logging function it is possible to back track and display past data.
With the NT31/NT31C, the data logging function can be used for the data of up to
8 lines. The maximum data quantity that can be recorded for each is 1440
points, and when this limit is exceeded the data is deleted from the oldest points.
If the “Clear Log” touch switch has been set, the data can be cleared at any time.
Содержание NT31 Series
Страница 1: ...Cat No V043 E1 2 Programmable Terminal NT31 31C OPERATION MANUAL...
Страница 2: ...iii NT31 31C Programmable Terminal Operation Manual Produced March 1999...
Страница 41: ...30 Before Operating Section 1 5...
Страница 75: ...64 Using a Memory Unit NT31 NT31C without V1 Section 3 6...
Страница 160: ...149...
Страница 174: ...163...
Страница 193: ...182...
Страница 211: ...200...
Страница 235: ...224 c Return to the screen on which screens are specified...
Страница 262: ...251...
Страница 284: ...273 The printer type control protocol and printing method are set with the memory switches of the NT31 NT31C...
Страница 347: ...336 Screen number 5 is set for touch switch 1 To next screen When touch switch 1 is pressed Screen number 5...
Страница 360: ...349 It is not possible to control a gloval window by touch switch operation...
Страница 375: ...364 For details on the method of display depending on the General settings refer to Common Attributes page 358...
Страница 391: ...380 1 The 100 value 0 value and 100 value must comply with the following relationship 100 value 0 value 100 value...
Страница 468: ...457 254 255 0 2 7 1 4 5 3 3 0 0 0 5 9 8 0 3...
Страница 476: ...465 Special Functions Section 7 16...
Страница 495: ...484 OFF...
Страница 610: ...599 Commands Responses Section 9 3...
Страница 630: ...619 Examples of Actual Applications of Memory Link Section 10 2...