NT21_Reference Manual (V069-E1-1) (986756), страница 41
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message length (1 to 40 characters) set in the general properties. For example, if the max. message length is set to 40 characters and the Info Type is setto Y/M/D h:m (15 digits), a total of 55 characters will be displayed in the alarmhistory.MessageLengthMaximum number of characters in the displayed messageNT31/NT31C: 1 to 39NT631/NT631C: 1 to 40For the alarm history function, the number of characters isdecreased by the number required to display the HistoryInfo.Restrictions also apply in accordance with the Scalesetting.Display ResultThe history is displayed as follows depending on the settings made for Generaland Settings:Message(Number of digits complieswith Length)Frequency of occurrence/Time of occurrence- Frequency:4 digits- Year/month/day hour:minute: 15 digits- Month/day hour:minute:12 digits- Hour:minute:6 digitsLine scroll touch switchesPage scroll touch switchesFor details on the method of display according to the General settings, refer toCommon Attributes (page 186).Alarm histories allow the screen to be switched in accordance with bit memorytable entry settings.
For details, refer to 2-3-3 Bit Memory Table (page 83).Timing of Message ReadingFor alarm lists and alarm histories in frequency order, when a message is displayed, scrolling, or screen switching, the character string memory table entryset for the bit memory table entry is read, and the latest message is displayed.In contrast, in the case of alarm histories in occurrence order, only when the status of the allocated bit of the bit memory table entry changes to 1 (ON), the character string memory table entry set for the bit memory table entry is read and itscontents are recorded. Accordingly, even if the contents of the character stringmemory table entry change later, the displayed message will be kept the recorded contents.
However, if the status of another monitored host bit changes to1 (ON) while an alarm history in occurrence order is being displayed, the latestmessage at that point is displayed.Display at Message UpdateWhen the status of a monitored host bit changes during display of an alarm list/alarm history, the display changes as follows:With an Alarm ListWith an alarm list, when the status of a monitored host bit changes to 1 (ON), thecorresponding message is displayed, and when it changes back to 0 (OFF), themessage is cleared (the messages are displayed in ascending order of bitmemory table entry numbers).189Alarm List, Alarm HistorySection 2-11• When a Message Is Added• If a message is added outside the display range (before or after the displayrange), there is no change in the messages being displayed.• If a message is added within the display range, the new message is displayed, and the messages following it are shifted one line downward.• When a Message Is Deleted• If a message is deleted outside the display range (before or after the display range), there is no change in the messages being displayed.• If a message is deleted within the display range, the messages following itare shifted one line upward, except when it is the topmost message in thedisplay that is deleted, in which case the message immediately precedingthe present display range is displayed in its place.If all the displayed messages are deleted at the same time, messages aredisplayed starting with a message with the same serial number (countingfrom the top) as the topmost of those that were displayed.
(For example, ifthe previous display started from serial number 7, the new display will alsostart from a message with serial number 7.)Alarm History in Occurrence OrderWith an alarm history in occurrence order, when the status of the monitored hostbit changes to 1 (ON), the corresponding message becomes the latest message(the messages are displayed from the oldest first or from the newest first, depending on the memory switch setting made at the PT). When the status of thebit changes back to 0 (OFF), the message remains displayed.If the statuses of multiple bits change to 1 (ON) at the same time, the bit memorytable entry with the smallest bit memory table entry number is given priority.• Display from Oldest Record FirstSince new messages are added at the end of the history, the displayed messages do not change. However, when the final page is displayed and a message is added below it, thetouch switch is displayed in reverse video toinform the operator that a message has been added.• Display from the Newest Record FirstNew messages are added at the top of the history.
When a message is added, the screen will switch to the display starting from the first message regardless of the current display position.Alarm History in Frequency OrderWith an alarm history in frequency order, when the status of a monitored host bitchanges to 1 (ON), the number of times that bit has changed to 1 (ON) is determined and the display is changed to reflect the new descending order of frequency of occurrence. When the bit status changes back to 0 (OFF), its frequency display remains unchanged.If there are bits with the same frequency of occurrence, the one whose bitmemory table entry has the smallest bit memory table entry number is displayedclosest to the top of the history.The display contents change in real time according to the frequencies of occurrence, but the display range does not change.
The serial number (counting from the top) of the message at the topmost position is retained until thedisplay range is changed by touch switch operation.Lighting of the Message Display Field and Touch Switches for ScrollingThe message display field and touch switches for scrolling light as follows according to the alarm list/history status:Message Display FieldWhen a message field is pressed for the first time after it is displayed, or pressedafter another message has been pressed, if image/library data is set for the cor-190Section 2-11Alarm List, Alarm Historyresponding bit memory table entry, the message field lights (the correspondingimage/library data is also displayed at this time).
This makes it possible to tell at aglance which message the displayed image/library data corresponds to.Line Scroll Touch SwitchesWhen there are messages above or below the displayed range, these touchswitches are lit. This makes it possible to tell at a glance whether there are anymessages outside the displayed range.Page Scroll Touch SwitchesIf there is one page or more of messages above or below the displayed range,these touch switches are lit.
This makes it possible to tell at a glance whetherthere are any messages outside the displayed range.Note on Clearing Alarm History Record DataThe alarm history record data can be cleared (initialized) by either of the following operations.• Select Maintenance Mode → Memory Init. → Alarm History from the System Menu.• Set bit 1 (alarm history initialization) of the PT status control bits to 1 (ON).Input FunctionsThe alarm list and alarm history only read the statuses of bit memory table entries and therefore have no direct input function.For details on the method for monitoring host bits, refer to 2-3-3 Bit MemoryTable (page 83).Output FunctionsAlarm lists and alarm histories have no output function.Processing FunctionsAlarm lists and alarm histories have no data processing function.Relationship with Other Elements• Alarm lists and alarm histories monitor the statuses of host bits, display messages and image/library data, switch screens, etc., in accordance with the settings of bit memory table entries.
For details, refer to 2-3-3 Bit Memory Table(page 83).• Alarm lists and alarm histories overlap with other elements in accordance withthe order in which they were registered for the screen with the Support Tool.However, the way in which they overlap can be changed with the Support Tool.191Section 2-12Inputting Numeric Values2-12 Inputting Numeric Values2-12-1 Numeric Key Type (Numeral Input)Numeric key type numeral setting input fields are input fields for inputting numeric values on the screen.The numeric values input into a numeral setting input field using touch switchesare written to a numeral memory table entry.The values can be input either in decimal or hexadecimal format.The input field functions as a numeral display when it is not receiving inputs.Outline of OperationThe basic operation of a numeric key type numeral setting input field is shownbelow.Function Outline1, 2, 3...1.
A numeric value is input into a numeral setting input field using touchswitches.PTNumeric value displayed inthe numeral setting input field12341 2 34 5 67 8 9InputInput the numeric value with the numerickeys on the screen.2. On confirming the input numeric value with the ENT key or touch switch itis written to a numeral memory table entry.At this time, the occurrence of change in the contents of the numeralmemory table entry is notified to the host via the PT status notify area.NT31/NT31C12341 2 34 5 67 8 9Restrictions192InputPTData writing1234NotificationHostNumeral memory table entryOn pressing the key, the input value is written tothe numeral memory table entry and the change isnotified to the host at the same time.• A maximum combined total of 256 of the following elements can be registeredfor one screen. (Same for window screens.) Even in the case of an overlappingscreen with eight child screens, it is only possible to register numeral settinginput fields on one of the child screens.Numeral setting input field (numeric key type),Character setting input field• A maximum combined total of 26 of the following elements can be registeredfor one screen for the NT21, 64 for the NT31/NT31C, and 256 for theNT631/NT631C.
(Same for window screens.) Even in the case of an overlapping screen with eight child screens, it is only possible to register numeral setting input fields on one of the child screens.Numeral setting input field (thumbwheel type)• It is not possible to set input from more than one numeral setting input field (numeric key type or thumbwheel type) on the same screen to one numeralmemory table entry. In cases where values at the host must be input both inSection 2-12Inputting Numeric Valuesdecimal and hexadecimal, set numeral input into separate numeral memorytable entries, both allocated in the same area.• The range of numeric values that can be input depends on the Storage Type(BCD or Binary) of the numeral memory table entry, and the Display Type(Decimal or Hexadecimal), and Display Sign settings made for the numeralsetting input field.
For details, refer to 2-3-1 Numeral Memory Table (page 72).• It is not possible to register multiple input fields (regardless of the type of numeric key or thumbwheel) that refer to the same numeral table entry on thesame screen.Common AttributesThe relationship between the properties of a numeral setting input field and thenumeric values input and displayed is indicated below.PropertiesGeneralPositionCoordinates of the top left corner of the numeral settinginput fieldFont TypeFont for the numeralsStandard/Half Height/Double WidthScaleScale at which the numeric value is displayed (Enlargeddisplay, page 142)1 1 (Equal), 1 2 (High), 2 1 (Wide), 2 2, 3 3,4 4, 8 8SmoothingWhether or not smoothing is used for numerals with ascale of 2 2 or larger (Smoothing, page 142)Check mark (smoothing executed)/No check mark (smoothing not executed)AttributeDisplay mode for the numerals (Display attributes anddrawing result, page 199)Standard/Flash/Inverse FlashColorForegroundDisplay color of the numerals (Colors other than black andwhite are available with the NT31C and NT631C only.)BackgroundBackground color of the numerals (Colors other thanblack and white are available with the NT31C andNT631C only.)Black/Blue/Red/Magenta/Green/Cyan/Yellow/WhiteBlack/Blue/Red/Magenta/Green/Cyan/Yellow/White193Section 2-12Inputting Numeric ValuesSettingsTable EntryNumber of the numeral memory table entry into which theinput numeric value is writtenRange: 0 to 1999Display TypeDisplay format for the numeric value (Input numeric valueand stored data, page 195)Decimal/HexadecimalFormat (Number of digits displayed, page 194)IntegerDecimalNumber of digits in the integer part ofthe numeric valueRange: 1 to 10Number of digits in the decimalfraction of the numeric valueRange: 0 to 9Maximumcombined total of10 digitsLimit (Upper/lower (max./min.) limit check, page 197)MaximumUpper limit for numeric values that can be inputMinimumLower limit for numeric values that can be inputZero Suppression Whether or not zero suppression is used (Zerosuppression, page 144)Check mark (zero suppression used)/No check mark (zero suppression not used)Display SignWhether or not negative numbers are indicated (settingineffective if Hexadecimal has been set for Display Format)(Input numeric value and stored data, page 195)Check mark (negative numbers indicated)/No check mark (negative numbers not indicated)Focus FramePresence/absence of a frame indicating that the numeralsetting input field has become ready to accept inputCheck mark (frame present)/No check mark (frame not present)Focus AttributeDisplay status before the input numeric value is confirmed(Display attributes and drawing result, page 199)Standard/Inverse/Flash/Inverse FlashInterlock FunctionInterlockPresence/absence of interlock control of numeral inputCheck mark (interlock)/No check mark (don’t interlock)PC address settingsPC bit addressAllocated interlock bit used to enable/disable operation ofthe numeral input (See Interlock Bit Allocation on page199.)I/O commentsComment that explains the allocated bit.Up to 16 characters.PositionForeground color123456Background colorNumber of Digits DisplayedAll contents of numeral memory table entries are stored as integers.
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