NT21_Reference Manual (V069-E1-1) (986756), страница 22
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When theresume function is used, the previous values will be used even if the initial valuesare changed, so changes to the initial values won’t be reflected in the table entries. Initialize the memory table values before starting operation to reflect changes in initial values.With the NT21, the resume function can be used only if the optional Battery isused. Without the Battery, the resume function will not operate even if the function is set to Yes.InitializeThe initialize setting determines whether the contents of character stringmemory table entries are written to the allocated word(s) in the host when thepower to the PT is turned ON, when the PT is reset, or the PT is switched to RUNmode from the System Menu.Here, initialize means the initialization of the contents of host word(s) as they areoverwritten by the contents of the numeral memory table entry.
If no words areallocated for the character string memory table entry in the host, this setting hasno effect.Reference: When the PT starts operation, the contents of character string memory table entries are as follows depending on whether or not the character string memorytable entry is allocated words in the host, on the initial setting for the characterstring memory table entry, and on whether or not the resume function is used:Words alallocatedat host?Resume FunctionInitial SetSettingCheckedYesUsed (Battery must bepresent.)Existing character stringmemory table value retained (at host word(s)also)Initial value of characterstring memory table entryused (at host word(s) also)When the character string memory table is initialized bySystem Menu operation: initial value of the characterstring memory table entry (at host word(s) also)Not checkedContents of host word(s)Existing character stringmemory table valueNoNot Used(Ineffective)Initial value of characterstring memory table entryWhen the character string memory table is initialized bySystem Menu operation: initial value of the characterstring memory table entryDisplay FunctionsCharacter string memory table entries themselves have no display function.To display the contents of character string memory table entries, use 2-9 Character String Display (page 148).Character strings can also be displayed as messages by using the alarm list(page 182) and alarm history (page 182) functions.Specify character string memory table entries when displaying character stringdisplays as guide characters of lamps or touch switches as well.Input FunctionsWhen one or more words are allocated for a character string memory table entryin the host, the contents of the words is read and stored.However, reading is only executed for those character string memory table entries that are being used for the currently displayed screen (when copying acharacter string memory table entry, the contents of the allocated word(s) of thecopy source memory table entry is read).82SectionMemory Tables2-3Output FunctionsWhen one or more words are allocated for a character string memory table entryat the host, the contents of the character string memory table entry are written tothe word(s).However, writing is only executed in the following cases.• When the contents of the character string memory table entry have changedas a result of operations at the PT, such as memory table copying by touchswitch operation, or use of the character string input function• When the Initial setting of string table entry is checked when the power to thePT is turned ON, the PT is reset, or on transition from the System Menu to theRUN mode (the contents of all words allocated for character string memorytable entries in the host and whose initial setting is checked are written.)Processing FunctionsCharacter string memory table entries have no data processing function.Relationship with Other Elements• When character string display is used, the contents of character string memorytable entries can be displayed in real time as character strings (page 148).• When alarm list or alarm history is used, the contents of the character stringmemory table entry can be displayed as a message (page 182).• When a lamp’s guide character is made into a character string display, the contents of a character string memory table entry can be displayed as guide characters in real-time (page 112).• When a touch switch’s guide character is made into a character string display,the contents of a numeral memory table entry can be displayed as guide characters in real-time (page 119).• When character string input is used, character strings can be input into thecharacter string memory table entry from the screen of the PT (page 210).
It isalso possible to input character strings from a bar code reader connected tothe PT.• When the touch switch copy setting function is used, the contents of a character string memory table entry can be copied (page 135).• By operation of the PT status control area. data can be copied betweenmemory table entries from the host (page 52).• If the contents of character string memory table entries are changed by operation at the PT, the change is notified to the PT status notify area (page 61).2-3-3 Bit Memory TableFunction OutlineThe bit memory table is held in memory for bit data.Bits are allocated to bit memory table entries in the host, and the status of the bitis monitored so that a specific function can be executed in accordance with thestatus of the bit.Bit memory table entries are assigned bit memory table entry numbers so thatthey can be managed and designated individually.Bit memory table entries have the following functions.Screen Changeover FunctionWhen the host bit allocated for a bit memory table entry changes status from 0(OFF) to 1 (ON), the screen whose screen number is set in the bit memory tableentry is displayed.BitScreen number 11displayedScreen number 10Screen number 11Screen number 12No.
1No. 2No. 3000PC← 1 (ON)83SectionMemory Tables2-3If the allocated bits of multiple bit memory table entries come ON at the sametime, the bit memory table entry with the smallest number takes priority.Alarm List/History FunctionWhen the status of the host bit allocated for a bit memory table entry changes to1 (ON), the contents of the character string memory table entry (message), andthe image/library data set for that bit memory table entry are displayed (this is thealarm list function).
In order to use the alarm list function, it must be registered forthe screen in advance. If more than one bit memory table entry is set for thealarm list function, those with smaller bit memory table entry numbers are givendisplay priority, therefore it is possible to assign an order or priority to displayedmessages.If registration in the alarm history is designated, the time when the status of thehost bit allocated for the bit memory table entry changes to 1 (ON) is recorded inthe alarm history (alarm history function).For details, refer to 2-11 Alarm List, Alarm History (page 182 ).Character stringmemory table entry 32Image/librarydata 102ACharacter string memory table entry 50Image/library data 0F51No. 13Character string memory table entry 32Image/library data 102ANo.
14Character string memory table entry 54Image/library data 12ABNo. 15Bit000PC← 1 (ON)Message (character string memory table entry 32)and image/library data (102A) set for bit memorytable entry 14.Operation when Using the Alarm List/History FunctionThe operation when using the alarm list/history function is as follows:Reference:S For the alarm list function, display is in ascending order of bit memory tableentry numbers.
For the alarm history function display is in occurrence order(from newest record/from oldest record) or frequency order.S With the alarm list function, when the host bit allocated for the bit memory tableentry returns to 0 (OFF) during display, the message and image/library data isautomatically cleared.1, 2, 3...1. When the status of a bit memory table entry changes to 1 (ON), the contentsof the set character 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).PROCESS 3 STOPPEDWATER TANK OVERHEATING84If 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.SectionMemory Tables2-32.
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 messageThe alarm list is composed oftouch switches. When a displayedalarm message is pressed, thecorresponding image/library data isdisplayed. The pressed alarmmessage is displayed in reversevideo.PROCESS 3 STOPPEDWATER TANK OVERHEATINGFAULTProcess 3 stopped by fault.Check DM2500.3. In case multiple messages are displayed, pressing another message willcause the newly pressed one to be displayed in reverse video, and the corresponding image/library data will be displayed.Image/library data corresponding to the second alarm messageIt 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.PROCESS 3 STOPPEDWATER TANK OVERHEATINGURGENTCheck the thermostat!4.
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