VLT ® 2800 SeriesInstallation441 = Integration time (I-time) 3-10 sec.(experienced value)442 = Differentiation time (D-time) 0-10sec. (experienced value)205 = Max. reference is to be set equal toparameter 415 (example: 10 bar)215 = Preset reference 1. Set the preset referenceto the wanted min. reference value (example: 5 bar)(Parameter 205 and 215 are shown in the processunit chosen in parameter 416).The value in brackets [ ] are data valuescorresponding to the wanted function. Example:Parameter 308 Feedback signal = [2]If the motor is supposed to always run at aminimum speed, a such can be selected inparameter 204 = output frequency low limit. (Forpump works it is typically 15-20 Hz).With the above connections and settings all normalpump and fan applications will work properly. Incertain cases it might be necessary to optimizethe PID-controllerr (parameter 440, 441 and 442)beyond the mentioned experienced values.MG.28.E9.02 - VLT is a registered Danfoss trademark 59
