Danfoss VT2800 Series Design Manual

Contents

VLT ® 2800 SeriesProgramming207 Ramp-up time 1(RAMP-UP TIME 1)Value:0.02 - 3600.00 sec ✭ 3.00 sec (VLT 2803-2875)10.00 sec (VLT 2880-2882)Function:The ramp-up time is the acceleration time from 0Hz to the rated motor frequency f M,N (parameter104 Motor frequency, f M,N). It is assumed that theoutput current will not reach the current limit (setin parameter 221 Current limit ILIM).Description of choice:Set the required ramp-up time.208 Ramp-down time 1(RAMP DOWN TIME 1)Value:0.02 - 3600.00 sec ✭ 3.00 sec (VLT 2803-2875)10.00 sec (VLT 2880-2882)Function:The ramp-down time is the deceleration timefrom the rated motor frequency f M,N (parameter104 Motor frequency, f M,N) to 0 Hz, providedno overvoltage arises in the inverter because ofgenerating operation of the motor.Description of choice:Set the required ramp-down time.209 Ramp-up time 2(RAMP UP TIME 2)Value:0.02 - 3600.00 sec. ✭ 3.00 sec (VLT 2803-2875)10.00 sec (VLT 2880-2882)Function:See description of parameter 207 Ramp-up time 1.Description of choice:Set the required ramp-up time. Shift from ramp 1 toramp 2 by activating Ramp 2 via a digital input.210 Ramp-down time 2(RAMP DOWN TIME 2)Value:0.02 - 3600.00 sec. ✭ 3.00 sec (VLT 2803-2875)10.00 sec (VLT 2880-2882)Function:See description of parameter 208 Ramp-down time 1.Description of choice:Set the required ramp-down time. Shift from ramp 1to ramp 2 by activating Ramp 2 via a digital input.211 Jog ramp time(JOG RAMP TIME)Value:0.02 - 3600.00 sec. ✭ 3.00 sec (VLT 2803-2875)10.00 sec (VLT 2880-2882)Function:The jog ramp time is the acceleration/decelerationtime from 0 Hz to the rated motor frequency f M,N(parameter 104 Motor frequency, f M,N). It is assumedthat the output current will not reach the currentlimit (set in parameter 221 Current limit ILIM).✭ = factory setting. () = display text [] = value for use in communication via serial communication portMG.28.E9.02 - VLT is a registered Danfoss trademark 81