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涓栫磤(j矛)鏄熺祫鎱�(t脿i)杌熶欢鍜孷isual Basic 6.0鏁�(sh霉)鎿�(j霉)浜ゆ彌

鏅�(sh铆)闁擄細2009-11-26 13:38:32渚嗘簮锛歾hangting

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3.2 VB澶栨帥绋嬪簭闁嬬櫦(f膩) 锛� 鍓�(chu脿ng)寤轰竴鍊�(g猫)VB妯�(bi膩o)婧�(zh菙n)宸ョ▼銆� 锛� Projiec鈥擟omponents鈥擠BComm ActiveX Control Moudle銆� 锛� 鍒濊│鍖朌BComm dbcomm_pid.InitComm 锛� 寰炰笘绱€(j矛)鏄熺祫鎱�(t脿i)杌熶欢璁€鍙栨韩搴﹁ō(sh猫)瀹氬拰瀵�(sh铆)闅涘€� SV= dbcomm_pid.tagReadFloat 锛�"sv"锛� PV= dbcomm_pid.tagReadFloat 锛�"pv"锛� 锛� y0杓稿嚭鏅�(sh铆)闁撹▓(j矛)绠楀嚱鏁�(sh霉)锛堟牴鎿�(j霉)P=0.5锛孖=0.5锛孌=0锛� Private Function PIDCalc锛坧p As PID, ByVal NextPoint As Double锛� As Double Dim dError As Double Dim Error As Double Error = pp.SetPoint - NextPoint pp.SumError = pp.SumError + Error dError = pp.LastError - pp.PrevError pp.PrevError = pp.LastError pp.LastError = Error PIDCalc = pp.P 锛� Error + pp.i 锛� pp.SumError + pp.D 锛� dError End Function 3.3 鍔犵啽杓稿嚭鎺у埗 鏍规摎(j霉)2涓▓(j矛)绠楃殑鍔犵啽鏅�(sh铆)闁擄紙鏅�(sh铆)闁撶櫨鍒嗘瘮锛寈%锛�1s锛�锛屽皪(du矛)PLC鐨刌0 閫�(j矛n)琛岃几鍑烘帶鍒�銆� Y0 ON/OFF锛歵agWriteDisc 锛�"y0",1锛�/ tagWriteDisc 锛�"y0",0锛夛紝Y0鑴堝瑾�(di脿o)鍒跺涓嬪湒鎵€绀猴細
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