Frequency Inverter DF51... - Moeller.com.tr

04/07 AWB8230-1541GB PID controlInverted PID control (PNU A077)With parameter A077 you can invert the differential e = w – x(reference value – feedback value), which is typical in I&C.aW(+)A077 = 00W +–ePIDf 2bX(+)XA071 = 01Figure 146: Standard PIDcontrol: e = w – xa Reference channelb Feedback value channelaW(+)A077 = 01W –+ePIDf 2bX(+)XA071 = 01Figure 147: Inverted PID control: e = –(w – x)a Reference channelb Feedback value channelInverted PID control (PNU A077 = 1) is used in applications inwhich the feedback value generator supplies an inverted signal.Example: With increasing pressure, a pressure sensor’ outputsignal (+10 V…0 V = 0…max. bar) drops.133