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HC900-Crawler/docs/HW_Universal_Modbus/Troubleshooting/Troubleshooting_history_backfill-QB5.htm
windpacer b4606fd91d docs: HC900 작업 문서 추가
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- HW_Universal_Modbus/: HC900 Modbus 통신 매뉴얼
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2026-06-04 09:44:42 +09:00

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<h1 class="topictitle"><a name="aanchor2156"></a>
<MadCap:concept term="trb" />Troubleshooting history backfill</h1>
<p>The <a href="#" class="MCTextPopup MCTextPopupHotSpot MCTextPopup_Open MCTextPopupHotSpot_ MCTextPopupHotSpot_Popup #text #textPopup">controller<span class="MCTextPopupBody popupBody"><span class="MCTextPopupArrow"> </span>Also known as remote terminal unit, RTU. A generic term for a device that is used to control and monitor one or more processes in field equipment. The most common control and monitoring device in an access control and security system is an access control panel. Other devices include security monitoring panels, elevator controllers, and fire monitoring devices. Controllers include programmable logic controllers (PLCs), loop controllers, bar code readers, and scientific analyzers. See also: C200 controller, control processor, CPM, hybrid controller, network node controller, PLC.</span></a> performs a history backfill and there are <a href="#" class="MCTextPopup MCTextPopupHotSpot MCTextPopup_Open MCTextPopupHotSpot_ MCTextPopupHotSpot_Popup #text #textPopup">trend<span class="MCTextPopupBody popupBody"><span class="MCTextPopupArrow"> </span>A display in which changes in value over time of one or more point parameters are presented in a graphical manner. See also: display, point parameter.</span></a> gaps/missed samples even though there has been no problem with the controller.</p>
<p>Using the HC Historian application, ensure that the controller has missed the specified samples.</p>
<p>A possible cause could be that the controller time is being changed or is being synchronized from another time source and the time has been moved forward.</p>
<p>Ensure only one <a href="#" class="MCTextPopup MCTextPopupHotSpot MCTextPopup_Open MCTextPopupHotSpot_ MCTextPopupHotSpot_Popup #text #textPopup">server<span class="MCTextPopupBody popupBody"><span class="MCTextPopupArrow"> </span>The computer on which the Experion database software and server utilities run. See also: Experion server TPS.</span></a> is connected to this controller. Also ensure that an engineering tool, such as HC (Hybrid Control) Designer, has not changed the controller time.</p>
<p>In HC Designer, if points are configured with <span class="uicontrol">Use Signal Tag</span> in the <span class="uicontrol">Trend Backfill Log Point Selection</span>, the backfill data cannot be matched to points built in <span class="ph"><span class="ph" MadCap:conditions="Combo_HPS.exp_ehs_elx" xmlns:MadCap="http://www.MadCapsoftware.com/Schemas/MadCap.xsd">Experion</span></span>. This results in bad address log messages when backfill is running. For more information, see the <a href="#" class="MCTextPopup MCTextPopupHotSpot MCTextPopup_Open MCTextPopupHotSpot_ MCTextPopupHotSpot_Popup #text #textPopup">HC900<span class="MCTextPopupBody popupBody"><span class="MCTextPopupArrow"> </span>Hybrid controller.</span></a> section in "Troubleshooting problems with specific controller models."</p>
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