Danfoss MCO 305 Operating Instructions Manual

Also see for MCO 305: Operating instructions Design guide Design guide

MCO 305 Operating Instructions__ How to Install __MG.33.K2.02 – VLT is a registered Danfoss trademark 25 Influence to the Control Loop when Changing ParametersThe gain of the control loop changes when one or more of the following parameters is changed: Maximumreference, encoder resolution, and gearing between motor and encoder.When changing these parameters the following rules apply:Increased maximum reference = P and D factors as well as Feed-forward must be reduced.Higher encoder resolution = P and D factors as well as Feed-forward must be reduced.Increase gear-ratio between motor and encoder (encoder turning slower) = P and D factors as well as Feed-forward must be increased.Examples 32-60 32-61 32-62 32-651024 PPR encoder connected directly to the motor shaftand maximum reference 1500 RPM200 1000 5 102004096 PPR encoder connected directly to the motor shaftand maximum reference 1500 RPM50 250 5 25501024 PPR encoder connected behind a 10:1 gearbox andmaximum reference 1500 RPM2000 10000 5 1020001024 PPR encoder connected directly to the motor shaftand maximum reference 3000 RPM100 500 5 5100Further optimizing can easily be done by means of the graphical Test-run tool which is included in theAPOSS editor this however implies that the motor/application can move. Executing a Test ProgramNow connect the motor to the FC 300, make sure that the motor can turn completely freely.NB!:The motor must be provided with an EMERGENCY STOP button.Select the file “Move-S.m” via the MCT 10. APOSSand with that the file is opened automatically.Click on Development and start the test programwith o Execute or [F5].The test is successful if the motor runs slowly backand forth and position 500 is registered.End the test with [Esc] and o Close the File.