Danfoss FC 300 Design Manual

Also see for FC 300: Operating instructions Instruction manual Design guide Design guide Design guide

Contents

Danfoss FC 300 Design Manual Manual pdf 147 page image

• An AMA can only be carried out if the rated motor current is a minimum of 35% of therated output current of the adjustable frequency drive. An AMA can be carried out on upto one oversized motor.• It is possible to carry out a reduced AMA test with a sine-wave filter installed. Avoidcarrying out a complete AMA with a sine-wave filter. If an overall setting is required,remove the sine-wave filter while running a total AMA. After completion of the AMA,reinsert the sine-wave filter.• If motors are coupled in parallel, use only a reduced AMA, if any.• Avoid running a complete AMA when using synchronous motors. If synchronous motorsare applied, run a reduced AMA and manually set the extended motor data. The AMAfunction does not apply to permanent magnet motors.• The adjustable frequency drive does not produce motor torque during an AMA. Duringan AMA, it is imperative that the application does not force the motor shaft to run, whichis known to happen with windmilling in ventilation systems, for example. This disturbsthe AMA function.7.1.9. Smart Logic Control ProgrammingA new useful facility in the FC 300 is the smart logic control (SLC).In applications where a PLC generates a simple sequence, the SLC may take over elementary tasksfrom the main control.SLC is designed to react based on an event sent to or generated in the FC 300. The adjustablefrequency drive will then perform the pre-programmed action.7.1.10. SLC Application ExampleOne sequence 1:Start – ramp-up – run at reference speed 2 sec – ramp-down and hold shaft until stop.Set the ramping times in par. 3-41 and 3-42 to the desired times.tramp =tacc ×nnorm (par. 1 − 25)Δref RPMFC 300 Design Guide 7. Application ExamplesMG.33.B9.22 - VLT® is a registered Danfoss trademark. 1477