NT21_Reference Manual (V069-E1-1) (986756), страница 37
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ofpoints*1Number of vertices in the broken line display (one memory tableentry is used for each vertex)2 to 260NT21:NT31/NT31C:2 to 320NT631/NT631C: 2 to 512Interval TypeInterval between numeral memory table entries in the brokenline.Even/Uneven (cannot resize) (0 to size in the broken linegraph Direction – 1)LineColorDisplay color of the broken line (Colors other than black andwhite are available with the NT31C and NT631C only.)Black/Blue/Red/Magenta/Green/Cyan/Yellow/WhiteStyleLine type used for the broken line graphSolid line:Broken line:1-dot chain line:2-dot chain line:100%*2 (Specify 100% value using either of Table Entry or Value.)Table EntryNumeral memory table entry number checked to find the100% value for percentage calculations@ Designate the number of the numeral memory table entrythat stores the 100% value.Range: 0 to 1999ValueChecked to find the 100% value for percentage calculations@ Designate the 100% value (default: 100)Range: –2147483648 to 21474836470%*2 (Specify 0% value using either of Table Entry or Value.)Table EntryNumeral memory table entry number checked to find the 0%value for percentage calculations@ Designate the number of the numeral memory table entrythat stores the 0% value.ValueChecked to find the 0% value for percentage calculations@ Designate the 0% value (default: 0)Range: 0 to 1999Range: –2147483648 to 2147483647–100%*2 (SpecifyTable Entry–100% value using either of Table Entry or Value.)Numeral memory table entry number checked to find the–100% value for percentage calculations@ Designate the number of the numeral memory table entrythat stores the –100% value.Range: 0 to 1999ValueChecked to find the –100% value for percentage calculations@ Designate the –100% value (default: –100)Range: –2147483648 to 2147483647*1: When making the setting, ensure that the total of the Start Table Entry and No.
ofPoints does not exceed the maximum table entry.166Section 2-10Graphs*2: The –100% value, 0% value, and 100% value must comply with the followingrelationship:–100% value < 0% value < 100% valueWhen a table entry is specified for the % value, the relationship above will not besatisfied if the contents of the specified numeral memory table entry areincorrect. In this case, the graph won’t be refreshed even if the values displayedon the graph are changed.The line thickness for broken line graphs is fixed as 1 dot.Reference: If a small value is set for Interval Type, even if broken line, 1-dot chain line, or2-dot chain line is specified the line will appear to be a solid line.Resulting DisplayWhen No Check Mark Is Set for display SignPosition(Top left corner of the rectangular area including the graph)Frame color100% positionDisplay color for the + rangeSize(Y direction)Line (color, style)0% positionNegative valuesare not displayed.Size(X direction)When a Check Mark Is Set for Display SignIn this case, the center of the graph is always the 0% position, regardless of thesettings made for 100%, 0%, and –100%.Position(Top left corner of the rectangular area including the graph)Frame color100% positionDisplay color of + rangeLine (color, type)Size(Y direction)0% positionDisplay color of – rangeNegative valuesare displayed.–100% positionSize (X direction)Direction of Broken Line GraphsThe directions of broken line graphs depending on the setting made for Directionare shown below.
The direction of a broken line graph means the direction inwhich the values in numeral memory table entries are plotted, starting from thenumeral memory table entry with the smallest table entry number and proceeding through progressively larger table entry numbers.167Section 2-10GraphsThe 100% value is at the top of the frame when the Direction is a lateral one andthe right of the frame when the Direction is a longitudinal one.UpGraph that is drawn frombottom to topLarge numberDownGraph that is drawn fromtop to bottomSmall number100%100%Small numberLarge numberLeftGraph that is drawnfrom right to leftRightGraph that is drawnfrom left to right100%100%Large numberSmall numberSmall numberLarge numberNumber of VerticesThe maximum number of vertices (numeral memory table entries) that can bedisplayed in one broken line is 260 in the NT21 PTs, 320 in NT31/NT31C PTs, or512 in NT631/NT631C PTs, but since a minimum interval of 1 dot is actually required between memory table entries, the following restriction applies depending on the width (number of dots) of the graph frame.Width of graph frame (number of dots) y No.
of PointsInterval Between Numeral Memory Table EntriesThe display interval between memory table entries can be set individually foreach memory table entry. Adjust the intervals as required.When Even is set for the Interval Type, the intervals are arranged evenly so as tomake use of the entire width of graph area.Example: Broken line graph where the interval changesMethod for Calculating the Percentage ValueThe percentage value is calculated as follows, depending on whether it is largeror smaller than the 0% value.However, note that although each vertex of the broken line graph is displayedbased on this value, individual percentage values are not displayed.• When displayed numeric value y 0%, and when no check mark is set for Display Sign:Percentage value =Displayed numeric value – [0%][100%] – [0%]100• When displayed numeric value < 0%:Percentage value =168Displayed numeric value – [0%][0%] – [–100%]100Section 2-10GraphsDifferences in the Broken Line Graph Display Method According to thePercentage ValueThe broken line graph display method varies according to the percentage valuerange.1, 2, 3...1.
When the percentage value is in the minus rangeThe display varies as follows according to the Display Sign setting.• No check mark: Displayed as 0%.• Check mark:The graph is displayed in the minus range.2. When the absolute value of the percentage value exceeds 100%If the percentage value exceeds 100%, or breaks through –100% and protrudes out of the graph area, only the parts of the lines within the graph areaare displayed.100%0%Values outside thisrange are not displayed.–100%Display FunctionsFor broken line graphs, the graph area is displayed in accordance with the General settings, and the broken line is displayed in accordance with the Settings(line attribute) settings.For details on the method of display depending on the General and Settings settings, refer to Common Attributes (page 165).• When multiple broken lines are registered, they overwrite each other in the order they were registered.
When broken lines overlay each other they are displayed according to the XOR principle (page 47), and consequently the linestyle and color may differ from those specified. The same principle applieswhen a broken line overlays the graph frame.Input FunctionsBroken line graphs have no input function.Output FunctionsBroken line graphs have no output function.Processing FunctionsBroken line graphs calculate the percentage value in accordance with the settings made for Settings (properties of each broken line).For details on the calculation method depending on the Settings (properties ofeach broken line) settings, refer to Common Attributes (page 165).Relationship with Other Elements• For details on how numeric values are stored in numeral memory table entries,refer to 2-3-1 Numeral Memory Table (page 72).• Broken line graphs overlap with other elements in accordance with the order inwhich they were registered for the screen with the Support Tool.
However, theway in which they overlap can be changed with the Support Tool.169Section 2-10Graphs2-10-4 Trend GraphsFunction OutlineTrend graphs represent the changes over time in the contents of a numeralmemory table entry as one line.It is possible to display more than one such line in the same frame so that theycan be compared.There are two types of trend graph: the standard type, where the graph is drawnas though a pen were moving across paper, and the pen recording type, wherethe graph is drawn as though the paper were moving under a pen.With trend graphs, a 100% value, 0% value and –100% value can be set for eachline in order to calculate and display the numeral memory table values in percentage terms.
The current percentage can be displayed.Past values can be recorded, and then displayed by back tracking (the loggingfunction), and the contents of numeral memory table entries can be collectedeven while other screens are displayed (the background function).Restrictions• One trend graph frame can be registered for one screen. (Same for windowscreen.) For an overlapping screen comprising 8 child screens, up to 8 trendgraph frames can be registered on each screen. Total maximum of 50 brokenlines can be registered on each screen.
Total maximum of 50 broken lines canbe registered for one screen regardless of the number of frames. (Same forwindow screen.)There is no restriction on the number of trend graph frames that can be registered for one screen data file: any number can be registered as long as thedata file capacity is not exceeded. However, if a large number of elementsare registered, check that the restrictions on element display are compliedwith by referring to Display Restrictions (page 437).In the case of trend graphs comprising past values recorded with the loggingfunction, up to eight broken lines can be registered for one screen.• If the set sampling cycle is shorter than the time taken for display update processing, sampling results that cannot be processed in time are skipped and thedata will not be displayed correctly.Example:170marks in the graph on left cannot beThe data indicated byprocessed in time for screen updating, and is skipped; therefore only the data indicated by f is displayed and the result isas shown in the graph on the right.Section 2-10GraphsCommon AttributesThe relationship between the properties of a trend graph and the display resultsis indicated below.PropertiesGeneralPositionCoordinates of the top left corner of the graph area.SizeWidth and height of the area in which the graph is displayed(dot units)NT21:Width 2 to 260; Height 2 to 140NT31/NT31C:Width 2 to 320; Height 2 to 240NT631/NT631C: Width 2 to 640; Height 2 to 480DisplayTypeMethod for drawing the line (Line drawing method, page 175)DrawingWidthInterval between consecutive data on the drawn graph in dotunits (Drawing width, page 175)Standard/Pen RecorderFrameWhether or not a frame is displayed for the graph areaCheck mark (frame displayed)/No check mark (frame not displayed)Display SignWhether or not a negative area is displayed.Check mark (displayed)/No check mark (not displayed)DirectionDirection of motion of the graph (Line drawing method, page175)Up/down/left/right@ For standard type:Direction of motion from the latest drawing position@ For pen recording type:Direction of motion of the line as a wholeSamplingCycleCycle (time interval) for data reading (graph updating)Range: 0.5 to 6553.5 in 0.5 second units(5 to 65535 ( 0.1) for entry; must be a multiple of 5)ColorFrameDisplay color of the frame (Colors other than black and white areavailable with the NT31C and NT631C only.)Black/Blue/Red/Magenta/Green/Cyan/Yellow/White+ RangeDisplay color of the positive range (Colors other than blackand white are available with the NT31C and NT631C only.)– RangeDisplay color of the negative range (Colors other than blackand white are available with the NT31C and NT631C only.)(effective only when a check mark is set for Display Sign)Black/Blue/Red/Magenta/Green/Cyan/Yellow/WhiteBlack/Blue/Red/Magenta/Green/Cyan/Yellow/White171Section 2-10GraphsSettings (properties of each line)Table EntryNumber of the numeral memory table entry whose contentsare displayed.Range: 0 to 1999Display %Presence/absence of a percentage indication of the contentsof the numeral memory table entry (Method for calculating thepercentage value, page 176)Check mark (percentage displayed)/No check mark (no percentage display)For details on the Display % properties, refer to the NumeralDisplay’s General Properties on page 141.LineColorDisplay color of the line (Colors other than black and white areavailable with the NT31C and NT631C only.)Black/Blue/Red/Magenta/Green/Cyan/Yellow/WhiteStyleLine type used@ Solid line:@ Broken line:@ 1-dot chain line:@ 2-dot chain line:100%*1 (SpecifyTable Entry100% value using either of Table Entry or Value.)Numeral memory table entry number checked to find the100% value for percentage calculations (effective only when acheck mark is set for Display %)@ Designate the number of the numeral memory table entrythat stores the 100% value.Range: 0 to 1999ValueChecked to find the 100% value for percentage calculations(effective only when a check mark is set for Display %)@ Designate the 100% value (default: 100)Range: –2147483648 to 21474836470%*1 (Specify 0% value using either of Table Entry or Value.)Table EntryNumeral memory table entry number checked to find the 0%value for percentage calculations (effective only when a checkmark is set for Display %)@ Designate the number of the numeral memory table entrythat stores the 0% value.Range: 0 to 1999ValueChecked to find the 0% value for percentage calculations(effective only when a check mark is set for Display %)@ Designate the 0% value (default: 0)Range: –2147483648 to 2147483647–100%*1 (Specify -100% value using either of Table Entry or Value.)Table EntryNumeral memory table entry number checked to find the–100% value for percentage calculations (effective only whena check mark is set for Display %)@ Designate the number of the numeral memory table entrythat stores the –100% value.Range: 0 to 1999ValueChecked to find the –100% value for percentage calculations(effective only when a check mark is set for Display %)@ Designate the –100% value (default: –100)Range: –2147483648 to 2147483647172Section 2-10Graphs*1: The –100% value, 0% value, and 100% value must comply with the followingrelationship:–100% value < 0% value < 100% valueWhen a table entry is specified for the % value, the relationship above will not besatisfied if the contents of the specified numeral memory table entry areincorrect.
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