Danfoss VT2800 Series Design Manual

Contents

VLT ® 2800 SeriesProgrammingoutputs can be programmed to give a warning signalvia terminal 46 and via the relay output.Description of choice:The lower signal limit of the output frequency f LOWmust be programmed within the normal operatingrange of the frequency converter. See drawing atparameter 223 Warning: Low current, I LOW .226 Warning: High frequency f HIGH(WARN.FREQ.HIGH)Value:Par. 200 Frequency range = 0-132 Hz [0]/[1].par. 225 f LOW - 132 Hz ✭ 132.0 HzPar. 200 Frequency range = 0-1000 Hz [2]/[3].par. 225 f LOW - 1000 Hz ✭ 132.0 HzFunction:If the output frequency exceeds the presetlimit f HIGH a warning is given.Parameters 223-228 Warning functions do notwork during ramp-up after a start command andafter stop command or during stop. The warningfunctions are activated when the output frequencyhas reached the resulting reference. The signaloutputs can be programmed to give a warning signalvia terminal 46 and via the relay output.Description of choice:The output frequency’s upper signal limit f HIGH mustbe programmed within the frequency converter’snormal operating range. See drawing at parameter223 Warning: Low current, I LOW.227 Warning: Low feedback, FB LOW(WARN.FEEDB. LOW)Value:-100,000.000 - par. 228 Warn.:FB HIGH✭ -4000.000Function:If the feedback signal falls below the presetlimit FB LOW , a warning is given.Parameters 223-228 Warning functions are out offunction during ramp-up after a start command andafter a stop command or during stop. The warningfunctions are activated when the output frequency hasreached the resulting reference.The signal outputs canbe programmed to give a warning signal via terminal 46and via the relay output.The unit for feedback in Closedloop is programmed in parameter 416 Process units.Description of choice:Set the required value within the feedback range(parameter 414 Minimum feedback, FB MIN and415 Maximum feedback, FB MAX).228 Warning: High feedback, FB HIGH(WARN.FEEDB HIGH)Value:Par. 227 Warn.: FB LOW - 100,000.000✭ 4000.000Function:If the feedback signal gets above the presetlimit FB HIGH , a warning is given.Parameters 223-228 Warning functions are out offunction during ramp-up after a start commandand after a stop command or during stop. Thewarning functions are activated when the outputfrequency has reached the resulting reference.The signal outputs can be programmed to give awarning signal via terminal 46 and via the relayoutput. The unit for feedback in Closed loop isprogrammed in parameter 416 Process units.Description of choice:Set the required value within the feedback range(parameter 414 Minimum feedback, FB MIN and415 Maximum feedback, FB MAX).229 Frequence bypass, bandwidth(FREQ BYPASS B.W.)Value:0 (OFF) - 100 Hz ✭ 0 HzFunction:Some systems call for some output frequenciesto be avoided because of mechanical resonanceproblems in the system. In parameters 230-231Frequency bypass these output frequencies can beprogrammed. In this parameter a bandwidth can bedefined on either side of these frequencies.Description of choice:The frequency set in this parameter will be centeredaround parameters 230 Frequency bypass 1and 231 Frequency bypass 2.✭ = factory setting. () = display text [] = value for use in communication via serial communication portMG.28.E9.02 - VLT is a registered Danfoss trademark 85