Omron NS10-TV Series, Programming Manual

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Section 2 NS Series Functions 2-16 Broken-line Graphs
2-370
NS Series Programming Manual
No. Setting Details
1 Start address Sets the start address referenced for the data.
Maximum and
minimum values
Sets the maximum and minimum values for graph display. If maximum and minimum
values are set, the color of the graph lines can be set to change when these values are
exceeded. If Indirect reference is set, the maximum and minimum values can be speci-
fied by the contents of an address.
Maximum Sets the upper limit.
2
Minimum Sets the lower limit.
3 Line color Select the line color (from a choice of 256 colors) under the Set Button. The color can
be changed depending on whether or not the set upper and lower limits have been
exceeded.
Line style Select from the five line types listed below. Solid line, dotted line, broken line, 1-dot
chain line, or 2-dot chain line
Display offset Displays the broken-line graph in an offset position, where a specified offset (number
of dots) have been added to the position for the present value.
4
Step display If step display is used, the origin is shown connected by vertical and horizontal lines.
Marker Selects one of the following five markers to be displayed at the peaks.
None, @ ,
{
, +, or ×
Size
Selects large, middle, or small for marker size.
The sizes are shown below.
Large Medium Small
5
Color Set the marker’s color (from 256 available colors).
6 Display when address
changes to ON When this option is selected, the graph line will be displayed while the specified
communications address is ON.
History Display Makes settings related to the history lines.
Line Color Sets the color of the history lines (from 256 available colors). Different colors can be
displayed for lines within the maximum and minimum values and lines outside of the
range.
7
Display/Hide Sets whether to display or hide the history lines. The Display/Hide setting can be speci-
fied indirectly by specifying an address in the
Indirect Reference Field and turning that
address ON/OFF.
Calculating the Amount of Broken-line Graph History Being Used
The amount of the broken-line graph history being used can be calculated for each group with the
following equations.
Bytes used by 1 group = 2
×
Storage type (see note)
×
Monitor points
×
No. of graphs
×
No. of Histories
Note: Use a multiplier of 1 for 1-word storage formats and a multiplier of 2 for 2-word storage formats.
Example: Broken-line graph group with the following settings
Storage format Monitor points No. of graphs No. of histories
Group 1 INT 10 2 10
Group 2 DINT 20 5 5
Bytes used = (2
×
1
×
10
×
2
×
10) + (2
×
2
×
20
×
5
×
5) = 400 + 4,000 = 4,400 bytes
Use the following equation to calculate the number of bytes remaining:
Remaining bytes = 300,000 – bytes used
From the equation above:
Remaining bytes = 300,000 – 4,400 = 296,000 bytes