how to use trend control of WinCC 7.5SP2 display historian data form OPC HDA？

SIMATIC S7-200/300/400, Step7, PCS7, CFC, SFC, PDM, PLCSIM,
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HOUYI
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Joined: Mon Jul 19, 2010 11:33 am

how to use trend control of WinCC 7.5SP2 display historian data form OPC HDA？

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how to use trend control of WinCC 7.5SP2 display historian data form OPC HDA？
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