VLT ® 2900 Series Special motor characteristic [8]. It is possible to deter- mine a U/f characteristic on the basis of four definable voltages and three frequencies. The voltage at 0 Hz is set in parameter 133 Start voltage . See parameter 423 U1 voltage . Set the output frequency (F2) that is to match the sec- ond output voltage (U2), parameter 425 U2 voltage . 0.0 - 999.0 V par. 103 See parameter 423 U1 voltage . Set the output voltage (U1) that is to match the first output frequency (F1), parameter 424 F1 frequency . Set the output voltage (U3) that is to match the third output frequency (F3), parameter 428 F3 frequency . 0.0 - par. 426 F2 frequen- cy Par. 104 Motor fre- quency Par.
426 F2 frequency - 1000 Hz Programming See parameter 423 U1 voltage . Par. 104 Motor fre- quency See parameter 423 U1 voltage . Set the output frequency (F1) that is to match the first output voltage (U1), parameter 423 U1 voltage . Set the output frequency (F3) that is to match the third output voltage (U3), parameter 427 U3 voltage . 0.0 - 999.0 V NB! Parameters 437-444 are only used if in parameter 100 Configuration a selection has been made of Process regulation, closed loop. [3]. See parameter 423 U1 voltage . par. 103 Set the output voltage (U2) that is to match the second output frequency (F2), parameter 426 F2 frequency. Normal (normal) [0] Inverse (inverse) [1] Par.
424 F1 frequency - par. 428 F3 frequency It is possible to choose whether the process regulator is to increase/reduce the output frequency if there is a Par. 104 Motor fre- quency = factory setting, () = display text, [] = value for use in communication via serial communication port MG.29.A3.02 - VLT ® is a registered Danfoss trademark 49 Function: Description of choice: 427 U3 voltage (U3 voltage) Value: Function: Description of choice: Description of choice: 424 F1 frequency (F1 frequency) Value: 428 F3 frequency (F3 frequency) Value: Function: Function: Description of choice: Description of choice: 425 U2 voltage (U2 voltage) Value: Function: Description of choice:
437 Process PID normal/inverse control (proc no/inv ctrl) Value: 426 F2 frequency (F2 frequency) Value: Function: