NT21_Reference Manual (V069-E1-1) (986756), страница 56
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The error message will be cleared when the data is written properly.268Section 2-17Device Monitor FunctionError messageProbable causeCannot write in RUN modeAttempted to write to a PC in RUN mode.Write-protected memoryAttempted to write to a read-only orwrite-protected area.If the Back touch switch is pressed before the Write touch switch, the inputwill be cancelled and the PT will restart monitoring with the original PV.Changing Binary PVsand Forcing Bit Status1, 2, 3...Use the following procedure to change the status of bits in the monitored word.This procedure cannot be used to change the PVs of timers or counters.1. Press the binary PV table cell in the desired row. (Pressing the cell won’thave any effect if a word isn’t being displayed in the row.)The following popup input window will be displayed.NT31/NT31C input windowNT631/NT631C input windowAt the same time, the binary PV field will be displayed in reverse video.0 1 1 1 1 1 1 1 0 1 0 1 1 1 0 0The cursor is located at the bit that is not displayed in reverse video.Reference:S Monitoring will stop in the row while the popup input window is being displayed.
Monitoring will continue in the other rows and any changes in thosewords will appear on the screen.S No other operations can be performed while the popup input window is beingdisplayed on the screen. (The PT can be controlled from the PC if the PT isoperating.)2. Press the Left and Right Arrow Keys to move the cursor to another bit.3. Specify the bits, value or forced status with the following touch switches onthe popup input window.ActionTouch switchBit displaySet the bit to 1 (ON).11Set the bit to 0 (OFF).00Force-set the bit.Set or Force-setSForce-reset the bit.Reset or Force-resetRIf the Clear touch switch is pressed, the new bit settings will be be cancelledand the display will be returned to the status it had before the popup inputwindow was opened or just after the data was written.Reference: The status of bits in the EM Area (EM or banks EM0 through EMF) cannot beforced.4.
Press the Write touch switch. The new bit values and/or forced status will bewritten to the word in the specified row, the hexadecimal PV, binary PV, and269Section 2-17Device Monitor FunctionPV character will change to match the new settings, and the PT will restartmonitoring. At the same time, the popup input window will be closed.If the new settings cannot be written, an error message will be displayed inthe lower-left corner of the screen and the buzzer will sound. (This buzzersound can be disabled with the PT’s touch switch sound setting.) In thiscase, check the status of the PC and specified data area and try changingthe value again.
The error message will be cleared when the new settingsare written properly.Error messageProbable causeCannot write in RUN modeAttempted to write to a PC in RUN mode.Write-protected memoryAttempted to write to a read-only orwrite-protected area.If the Back touch switch is pressed before the Write touch switch, the inputwill be cancelled and the PT will restart monitoring with the original PV.Reference: If Device Monitor has been used to force-set or force-reset bit(s) in the displayedword, a message will appear in the bottom-left corner of the screen indicating thatthere are bits in the word with forced status.
This message will not appear if the bitstatus was forced by operations at the PC.Clearing All Force-setand Force-reset BitsReference:Use the following procedure to clear the forced status for all of the PC’s bits ortimer/counter Completion Flags that have been force-set or force-reset.S This operation clears the forced status of all bits and Completion Flags in thePC, whether the status was forced from the Device Monitor function or from aProgramming Device connected to the PC.S Bits and timers/counters will have the following status after the forced status iscleared:Bits that were force-set:Bits that were force-reset:Timers/counters that were force-set:Timers/counters that were force-reset:1, 2, 3...01PV reset to 0000PV reset to status before force-reset1. Press the binary PV table cell in the desired row where a word other than atimer/counter is being monitored.
(Pressing the cell won’t have any effect if aword or timer/counter isn’t being displayed in the row.)The following popup input window will be displayed.NT31/NT31C input windowNT631/NT631C input window270Device Monitor FunctionSection 2-17Reference:S Monitoring will stop in the row while the popup input window is being displayed. Monitoring will continue in the other rows and any changes in thosewords will appear on the screen.S No other operations can be performed while the popup input window is beingdisplayed on the screen. (The PT can be controlled from the PC if the PT isoperating.)2. Press the Release or Force release touch switch in popup input window.
Aconfirmation message will be displayed in the bottom-left corner of thescreen.3. Press the Write touch switch to clear the forced status of all bits and timer/counter Completion Flags in the PC.If the Clear touch switch is pressed instead of Write, the forced-status clearoperation will be cancelled and the PT will revert to the ordinary binary PVspecification screen.4. Press the Back touch switch to close the popup input window.If the Back touch switch is pressed before Write, the forced-status clear operation will not be completed and the PT will restart monitoring with the original conditions.Precautions forForce-setting,Force-resetting, andClearing Forced StatusWhen the following operations are performed at the PC or at the PT (with theDevice Monitor), the Device Monitor display may not properly reflect the forceset status, force-reset status, or cleared forced status.• A word displayed with bits that have forced status should be displayed againafter exiting the display.• A bit that was force-set or force-reset from Device Monitor is cleared from thePC (In addition to intentional forced-status clear operations, the same forcedstatus clear condition can occur by turning the PC OFF or disconnectingcables.)• A bit that was force-set from Device Monitor is force-reset from the PC or a bitthat was force-reset from Device Monitor is force-set from the PC.• The PC is switched from RUN mode to MONITOR or PROGRAM mode withthe Forced Status Hold Bit set to OFF.Observe the following precautions in addition to the precautions listed above.• When the PC is in RUN mode, it is not possible to force-set, force-reset, orclear the forced status of bits.• Do not force-set or force-reset the status of bits in write-protected areas orareas where the operation normally cannot be performed.2-17-6 Using the Continuous Monitor ScreenThe continuous monitor screen can be used to display the contents of words inthe DM Area and EM Area.Reference: A word or bit address that has been specified will remain valid until the PT isturned OFF or reset.
The settings will remain valid even if the Device Monitorfunction is closed, so the last valid settings will be displayed the next time that theDevice Monitor function is started.271Section 2-17Device Monitor FunctionNT31/NT31C ScreenData areaAddressHexadecimal PV areaASCII character areaWith the NT31/NT31C, the PVs of up to 25 words (5 words × 5 rows) can be displayed simultaneously.NT631/NT631C ScreenData areaAddressHexadecimal PV areaPV areaWith the NT631/NT631C, two tables of 50 words (10 words × 5 rows) can be displayed simultaneously for a total of 100 words.Data Area and AddressThe first column displays the word address (data area acronym and address) ofthe first (leftmost) of the words being monitored in that row.Hexadecimal PV AreaThis area displays the PVs of the words in hexadecimal.ASCII Character AreaThis area displays the ASCII equivalent of the PVs in the row.
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