NT21_Reference Manual (V069-E1-1) (986756), страница 40
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Method memory switch of the PT.S In the case of alarm lists, if the status of a host bit allocated to a bit memory tableentry changes to 0 (OFF), the message and image/library data are also automatically cleared at the same time.In the case of alarm histories, even if the status of a host bit allocated to a bitmemory table entry changes to 0 (OFF), the message and image/librarydata remain.S The alarm history record data can also be displayed and printed out in theMaintenance mode under the System Menu of the PT. (Printing is supported byonly the NT31/NT31C and NT631/NT631C.)1, 2, 3...1.
When the status of an allocated bit of a bit memory table entry for which thealarm list/history function is set changes to 1 (ON), the contents of the setcharacter string memory table entry are displayed as a message.Contents of character string memory table entryset for the bit memory table entry whose statushas changed to 1 (ON).If an alarm list with multiple lines iscreated, alarms are displayed inascending order of bit memory tableentry numbers.If the bit memory table entries are set inascending order of priority, the displaywill also be arranged in accordancewith the order of priority.PROCESS 3 STOPPEDWATER TANK OVERHEATING2. Each message area is a touch switch and pressing a message displays theset image/library data.
At the same time, the pressed message is displayedin reverse video.Image/library data corresponding to the first alarm messagePROCESS 3 STOPPEDWATER TANK OVERHEATINGFAULTProcess 3 stopped by fault.Check DM2500.184The alarm list is composed oftouch switches. When a displayedalarm message is pressed, thecorresponding image/library data isdisplayed. The pressed alarmmessage is displayed in reversevideo.Section 2-11Alarm List, Alarm History3. In case multiple messages are displayed, pressing another message willcause it to be displayed in reverse video, and the corresponding image/library data will be displayed.Image/library data corresponding to the second alarm messagePROCESS 3 STOPPEDWATER TANK OVERHEATINGURGENTIt is also possible to setcorrespondence between bit memorytable entries and screen numbers.Here, if the second alarm message ispressed again, the correspondingscreen will be displayed.Check the thermostat!4. When a message displayed in reverse video is pressed again, the displaywill switch to the screen with the set screen number.Reference: In the case described above, both image/library display and screen changeoverfunctions are set.
The operation when a touch switch is pressed is determined asfollows in accordance with these settings:RestrictionsImage/library disdisplayScreenchangeoverFirst timeSecond timeNot setNot setNo effectNo effectNot setSetScreen changeover–SetNot setImage/library data displayNo effectSetSetImage/library data displayScreen changeoverTouch switch• A combined total of up to 4 alarm lists and alarm histories can be displayed onone screen. (Same for window screen) In the case of an overlapping screenwith 8 child screens, the maximum total is 32 on one screen.• With the NT21, up to 7 alarm list/alarm history messages can be displayed atthe same time. NT31/NT31C, up to 12 alarm list/alarm history messages canbe displayed at the same time.
With the NT631/NT631C, up to 24 alarm list/alarm history messages can be displayed at the same time.The remaining messages can be displayed by pressing the line/page scrolltouch switches.• An alarm list can monitor bit memory table entries in the range from No. 1 to No.1000. (When 1000 is set for number of bit memory table entries)• The maximum number of data to be recorded with the alarm history is 250 fororder of occurrence, and 255 for order of frequency.• When displaying image/library data with alarm list/alarm history elements, themaximum simultaneous display restriction imposed on image and library dataapplies. Therefore a maximum combined total of 256 image/library data usedfor alarm lists/histories and image and library data used for other applicationscan be displayed on one screen.
For an overlapping screen comprising 8 childscreens, the maximum is 1024.• If, when library data is displayed with an alarm list/history, the library data projects outside the image/library data display area, nothing is displayed. In thecase of image data, only the part inside the area is displayed.• If no data is registered for the image/library code specified for use with analarm list/alarm history, nothing will be displayed.• The contents of the character string memory table entries displayed as messages for alarm lists and alarm histories are read at the following times.185Section 2-11Alarm List, Alarm History• When an entire alarm list or alarm history is displayed by screen switching• When a bit being monitored by the alarm list function changes status fromOFF to ON, and the corresponding message is displayed.Messages already displayed are unaffected even if the contents of character string memory table entries change.• The message display areas for alarm lists/histories are touch switches.
Do notoverlap them with other touch switches.Common AttributesThe relationship between the common properties of alarm lists and alarm histories and the display result are indicated below.PropertiesGeneralPositionCoordinates of the top left corner of the alarm list/history.SizeWidth and height of the alarm list/history (in dot units)(But note that motion is in touch-switch-sized units only)MessageLengthMaximum number of characters in the displayed messageNT21:1 to 32NT31/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 LineQtyMaximum number of displayed messagesNT21:1 to 7NT31/NT31C:1 to 12NT631/NT631C: 1 to 24ScaleScale at which messages are displayed (Enlarged display,page 151)1 1 (Equal), 1 2 (High), 2 1 (Wide), 2 2, 3 3,4 4, 8 8SmoothingWhether or not smoothing is used for characters with ascale of 2 2 or larger (Smoothing, page 151)Check mark (smoothing executed)/No check mark (smoothing not executed)Line Scroll TouchSwitchesPresence/absence of touch switches for scrollingmessages in line unitsCheck mark (touch switches present)/No check mark (touch switches absent)Page Scroll TouchSwitchesPresence/absence of touch switches for scrolling messages in page unitsCheck mark (touch switches present)/No check mark (touch switches absent)186Section 2-11Alarm List, Alarm HistoryGeneralColorFrameColor of the frame (Colors other than black and white areavailable with the NT31C and NT631C only.)Black/Blue/Red/Magenta/Green/Cyan/Yellow/WhiteBackgroundONON color of the message display field (Colors other thanblack and white are available with the NT31C andNT631C only.)Black/Blue/Red/Magenta/Green/Cyan/Yellow/WhiteOFFOFF color of the message display field (Colors other thanblack and white are available with the NT31C andNT631C only.)Black/Blue/Red/Magenta/Green/Cyan/Yellow/WhiteImage & LibraryDisplayImageLibPresence/absence of image library displayCheck mark (present)/No check mark (absent)ColorForegroundForeground color of images (valid only for image data inthe 2 Colors mode)Black/Blue/Red/Magenta/Green/Cyan/Yellow/WhiteBackgroundBackground color of image/library displaysBlack/Blue/Red/Magenta/Green/Cyan/Yellow/White/Transparent (Transparent is only possible for alarmlists)Position(Top left corner of the rectangular area including the messagedisplay field, touch switches, and image/library display field)LengthImage/library display fieldSize (Y direction)DisplayLine QtySize (X direction)Frame colorON/OFF color• The position and size of the image/library display field can be changed withoutrestriction.• The positions of line/page scroll touch switches can be set without restriction.However, the display colors and sizes of them cannot be changed.• When an image or library display that is larger than the display field has beenspecified, the image/library display will be displayed full-size at the SupportTool but will be cropped in the smaller PT display field.Reference: For details on the screen numbers that can be switched by the alarm list/historyfunction and the image/library codes that can be set, refer to 2-3-3 Bit MemoryTable (page 83).187Section 2-11Alarm List, Alarm HistoryDisplay FunctionsAlarm ListApart from the Common Attributes, alarm lists have the properties indicated below.PropertiesSettingsList SettingsStart Bit TableEntryFirst bit memory table entry number of the bit memorytable entries used for monitoring for the alarm listRange: 0 to 1999No.
of BitsReferencedNumber of bit memory table entries used for monitoringfor the alarm listRange: 1 to 1000Bit memory tableBit memory table entry 24Bit memory table entry 25Bit memory table entry 26Bit memory table entry 27Bit memory table entry 28Bit memory table entry 29Bit memory table entry 30Bit memory table entry 31First bit memory table entry: 25Number of bit memory table entries: 5Drawing ResultAn alarm list monitors host bits allocated to bit memory table entries within thespecified range in accordance with the bit memory table entry function propertysettings and executes display in accordance with the General settings.For details on the method of display according to the General settings, refer toCommon Attributes (page 186).Alarm lists allow the screen to be switched in accordance with bit memory tableentry settings.
For details, refer to 2-3-3 Bit Memory Table (page 83).Alarm HistoryApart from the Common Attributes, alarm histories have the properties indicatedbelow.PropertiesSettingsHistory InfoPresence/absence of occurrence time/occurrencefrequency displays (this means the presence orabsence of the time of occurrence in the case of orderof occurrence, and the presence or absence of theoccurrence frequency in the case of order of frequency)Check mark (present)/No check mark (absent)Order TypeType of displayorder of frequency/order of occurrenceInfo TypeMethod of display for the time of occurrence (setting effective only when order of occurrence is set for Order Typeand a check mark is set for History Info.)Y/M/D h:m188Year/month/day hour:minute (15 digits)M/D h:mMonth/day hour:minute (12 digits)h:mHour:minute (6 digits)Section 2-11Alarm List, Alarm HistoryReference: The number of characters in the specified date/time display are added to themax.
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