Mitsubishi Electronics FR-V500 instruction manual Troubleshooting Machine operates unstably

Page 92

Troubleshooting

6.4.5Machine operates unstably

(1) Speed control

The machine operates unstably.

Is the acceleration/

Y

deceleration time longer

 

than the setting?

 

N

Y

Is torque insufficient?

Increase the torque restriction value, or increase the excitation

N ratio (Pr. 854).

<Refer to the Instruction Manual (detailed).>

Increase the motor and inverter capacities.

Is the load inertia large?

Y

Is the acceleration/ deceleration time extremely short?

N

Is the speed control gain too high. (Vibration/hunting)

N

Set the acceleration/

deceleration time that matches

 

 

the load inertia.

 

 

Y

Increase the acceleration/ deceleration time.

Y

N

Does speed fluctuation occur at low speed?

N

Perform easy gain tuning. Decrease the speed control proportional gain (Pr. 820). Increase the speed control integral time (Pr. 821).

Y

Is the carrier frequency high?

N

Is the speed control gain low?

N

Y

Decrease the carrier frequency (Pr. 72).

Y

Increase the speed control proportional gain (Pr. 820). Decrease the speed control integral time (Pr. 821).

AND PROTECTIVE FUNCTIONS

Please contact your sales representative.

 

 

Y

Is torque insufficient?

 

 

 

 

 

 

 

 

The possible cause is the

N

adverse effect of weak

excitation.

 

 

 

 

Increase the excitation ratio

 

 

(Pr. 854). <Refer to the

 

 

Instruction Manual (detailed).>

 

 

 

ERRORS

6

88

Image 92
Contents Biases and gains of speed setting terminals Thank you for choosing this Mitsubishi Vector Inverter101 102Electric Shock Prevention Transportation and installation WiringTrial run OperationMaintenance, inspection and parts replacement Emergency stopDisposing of the inverter General instructionsAbbreviations Harmonic Suppression GuidelineProduct check and name of parts Front viewBasic configuration Basic configuration and connection of peripheral devicesBasic configuration and connection of peripheral devices Select the NFB type according to the power supply capacity Selection of peripheral devices200V class 400V classRemoval and reinstallation of the front cover ReinstallationStructure StructureReinstallation Structure Removal and reinstallation of the operation panelReinstallation using the connection cable Install the inverter under the following conditions Installation of the inverterInstallation of the inverter Connection diagram Connection diagram, PLG cable, PU connectorConnection diagram, PLG cable, PU connector Terminal Symbol Terminal Name Description Connection diagram, PLG cable, PU connector Main circuitSpecification of main circuit terminal Terminal arrangement of the main circuit terminal Screw size M8400V class Screw size M6Cables and wiring length 200V class When input power supply is400V class When input power supply is Cable gause for the control circuit powerType Length L m Setting the PLGPLG output circuit jumper connector Parameter Name Factory Setting Setting Range Remarks Pr Setting Relationship between the motor and PLGType Terminal Terminal Name Description Symbol Connection diagram, PLG cable, PU connector Control circuitSpecifications of control circuit terminals Control circuit terminal layout Wiring instructionsNot output during inverter reset Changing the control logic When using an external power supply for transistor output For computer link communication Setting the m otor Setting the motorParameter Name Factory Setting Setting Range Dedicated motor SF-V5R 1500r/min seriesAt-a-glance guide to motor setting When using other manufacturers’ motorsMotor Rated Voltage Precautions for use of the vector inverterPrecautions for use of the vector inverter Basic operation Speed setting, run, speed meter adjustment Setting the speed and running the motorChecks prior to test run Checks prior to test runBasic operation Speed setting, run, speed meter adjustment Turn on the start switch STF or STRPU jog operation Operation status indication FWD or REV flickersExternal jog operation Changing example Display the present operation speed by pressing SET toIt may take some time until the pointer moves To stop the inverterNames and functions of the operation panel Names and functions of the opera- tion panelKey indication Unit indication, operation status indicationSpeed setting Used to set the running speed in the PU operation modeAlarm *1 absent MonitoringOperation mode Once, press SET , and restart the setting from the beginningAlarm history clear Clears all alarm history Names and functions of the opera- tion panel Help modeAlarm history Parameter clear All clearNames and functions of the opera- tion panel Copy mode Parameter setting modeSetting procedure Speed control operationSpeed control operation Speed controlSpeed control operation Operation command setting Forward and reverse rotation commands terminals STF, STRSpeed command Torque restrictionTorque restriction level Second torque restriction levelGain adjustment Preset speed-speedTorque restrictions during acceleration and deceleration Pr deceleration torqueWhen 0 is set in Pr or Pr acceleration/deceleration time Torque control operationTorque control operation Torque controlO signals Following table indicates the operations of the signalsSignal Terminal Name Remarks Operation example Pr =0Torque control operation Setting procedure Torque command right selectionTorque command setting Perform secure wiring. Refer to Set the PLG. Refer toSpeed restriction 10E +10V When Pr =Used to give a speed restriction command Position command from parameter setting Position command from PLCPosition control operation Position control operationControl mode switchover timing Control mode switchover timing〈 Example Speed Position, when Pr = 4〉 Assumes that the Pr value is the factory settingEasy gain tuning Easy gain tuningEasy gain tuning execution procedure Start signalEasy gain tuning Precautions for easy gain tuning Automatically set parameters by easy gain tuningChecking the Pr control system selection value Load inertia estimation restriction conditionsPage Online auto tuning Online auto tuning2 Pr =1 start-time tuning 3 Pr = 2 normal tuning/adaptive magnetic flux observerSetting Output speedTorque % 10VSetting change 1.5 s Read Pr to display the currently set gain speedValue is 100% Current analog voltage adjustment valueExample When the analog Simple mode parameter list Function list Simple mode parametersFunction list Simple mode parameters Setting Carrier Frequency You can change the motor soundRefer to page 62 for Pr soft PW M control Pr maximum speed, Pr minimum speedRefer to page 46 for details Setting Drive System Control Method Remarks Refer to page 43 for detailsPr extended function display selection Pr control system selectionFunction list Extended function parameters Function list Extended function parametersDeceleration pattern RegenerativeSpeed jump 1A Speed jump 1BRemote setting Intelligent modeAlarm occurrence DA1 terminal functionPWM frequency Selection Speed setting signalApplied motor Reset selection Parameter write Disable selection Reverse rotationOperation mode Online auto tuning Selection Auto tuning setting123 Waiting time setting 144 Speed settingSwitchover 117 Station number157 OL signal output TimerPower failure Stall prevention 156 Operation selectionMaker setting parameters. Do not make setting 169 168171 Actual operation hour Meter clear DI1 terminal function232 Multi-speed setting Multi-speed setting 233234 Multi-speed setting 236 Multi-speed settingCommand selection Switchover speedCommand 357 In-position zone 286 Droop gainPosition command Command pulse 420 Scaling factor NumeratorCommand filter 427 Excessive level errorDigital position 464 Control sudden stop465 First position feed Amount lower 4 digitsSelection 801 Torque characteristic Characteristic805 Torque command Value RAM Torque command818 Easy gain tuning Response level setting 819 822 Speed setting filter826 Torque setting filter 832 Speed setting filterAdjustment 840 Torque bias selection841 Torque bias 842 Torque bias874 OLT level setting Fault definition890 Maintenance output Setting time 892 Maintenance outputMajor faults Errors AlarmsErrors Alarms OV During Acc OV During DecMotor Overload Inv. OverloadBr. Cct. Fault Ground FaultInst. Pwr. Loss Under VoltageOH Fault Option FaultOption slot alarm 1 to Stll Prev STP OL shown during stallFault 1 to Fault CPU FaultCorrupt Memry PU Leave OutFault Indication Fault NameOperation Panel P24 Operation Panel P12No encoder signal Excessive position errorNo encoder a signal Overspeed occurrenceStall prevention Minor faultFan Failure Operation Panel Err Indication Errors Alarms How to recover from PU stop error PS Reset from operation panelCorrespondences between digital and actual characters Resetting the inverterCorrespondences between digital and actual characters Memo Troubleshooting TroubleshootingMotor generates abnormal noise Vector controlTroubleshooting Motor does not rotate Vector controlCommand been Is the torqueFor speed restriction? ParameterF control Troubleshooting Motor generates heat abnormally Being made? Troubleshooting Motor huntsSpeed control Troubleshooting Machine operates unstably Does the inverters speed command match the motor speed? Troubleshooting Speed command does not match motor speedHave you set the motor type? Is the PLG setting correct? Troubleshooting Motor rotates but speed does not change Troubleshooting Torque control is not exercised normally Is the wiring length short?Torque control Pr , Pr Is an externalIs the torque command unvaried? Reduce noiseFrequency low? Filter PrPrecautions for maintenance and inspection Precautions for maintenance and inspectionInsulation resistance test using megger Check itemsDo not conduct a pressure test. Deterioration may occur Precautions for maintenance and inspection Pressure testDaily and periodic inspection Replacement of parts Part Name Standard Replacement Interval DescriptionInterval Area Inspection DescriptionRelays Cooling fanSmoothing capacitors Measurement of main circuit voltages, currents and powers Examples of Measuring Points and InstrumentsMeasuring Points and Instruments 100% Pf1 =100% Pf2 =Model specifications Model specificationsThree-phase, 380 to 480V 50Hz/60Hz Three-phase, 380V to 480V 50Hz/60Hz10.0 12.8 19.0 24.6 30.4 35.8 46.3 59.5 68.5 91.0 10.0 14.5 18.5 27.5 35.5 51.8 132Common specifications Common specificationsOutline dimension drawings Outline dimension drawingsInverter outline dimension drawings FR-V520-1.5K‚ 2.2K FR-V540-1.5K‚ 2.2K250 FR-V520-11K‚ 15K FR-V540-7.5K‚ 11K, 15K, 18.5KFR-V520-18.5K FR-V520-22K, 30K‚ 37K !FR-V540-22K, 30K‚ 37K Inverter TypeSF-V5RH 1K SF-V5RH 2K ‚ 3KSF-V5RH 5K ‚ 7K SF-V5RH 30K ‚ 37K ‚ 45K ‚ 55K 110For Maximum Safety Print Date Manual Number Revision