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Toshiba VF-FS1 instruction manual Avoiding overvoltage tripping

Models: VF-FS1

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E6581381

6.12.4 Avoiding overvoltage tripping

H : Overvoltage limit operation

H : Overvoltage stall protection level

•Function

These parameters are used to keep the output frequency constant or increase it to prevent overvoltage tripping in case the voltage in the DC section rises during deceleration or varying speed operation. The deceleration time during overvoltage limit operation may increase above the designated time.

Overvoltage limit operation level

Output

Frequency

DC Voltage H : Over-voltage stall protection level

6

[Parameter setting]

Title	Function	Adjustment range	Default setting
		0: Enabled
		1: Disabled
H	Overvoltage limit operation	2: Enabled (Quick	2
	(Slowdown stop mode selection)	deceleration)
		3: Enabled (Dynamic quick
		deceleration)
H	Overvoltage limit operation level	100-150%	140

+If H is set to (quick deceleration), the inverter will increase the voltage to the motor (over- excitation control) to increase the amount of energy consumed by the motor when the voltage reaches the overvoltage protection level, and therefore the motor can be decelerated more quickly than normal deceleration.

+If H is set to (dynamic quick deceleration), the inverter will increase the voltage to the motor (over-excitation control) to increase the amount of energy consumed by the motor as soon as the motor begins to slow down, and therefore the motor can be decelerated still more quickly than quick deceleration.

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Toshiba VF-FS1 instruction manual Avoiding overvoltage tripping

Contents

Industrial Inverter Page Safety precautions Meanings of symbolsSafety precautions Explanation of markingsGeneral Operation Transportation & installation WiringOperations When retry function is selected inverter Maintenance and inspectionDisposal Attach warning labelsFeatures II. Introduction Contents  E6581381 Iii Read first Check product purchaseContents of the product Names and functions Outside viewBottom Power circuit and control circuit terminal boards Power circuit terminal boardVFFS1-2004 ∼ 2037PM VFFS1-4004 ∼ 4055PL E6581381 E6581381 Grounding capacitor disconnecting switch and taps Control circuit terminal board AWGHow to open the front terminal board cover-18.5kW or less How to open the front terminal board cover-22kW or More Motors Braking a motor when cutting off power supply Low loads and low inertia loadsOccurrence of instability Load that produces regenerative torqueInverters Braking motorMeasures to protect motors against surge voltages Protecting inverters from overcurrentPower factor correction capacitor If power supply distortion is not negligibleOperating at other than rated voltage MCCB1What to do about the leak current Effects of leak current across groundRemedies ElcbAffects of leakage current across lines Installation Installation environment5cm How to install Standard installation Side-by-side installationOperating motor Calorific Values w Installing more than one unit in a cabinet Page Connection Control and main power supply WiringStandard connections Preventing radio noiseStandard connection diagram Standard connection diagram Power circuit terminals Description of terminalsPower circuit Control circuit terminalsControl circuit terminals VIA VIBFLA FLBFLC PLC Logic switching Operations Simplified Operation of the VF-FS1 EoqfHoqf How to start and stop Example of a Eoqf setting procedureStart and stop using the operation panel keys EOQF= Coast stopHow to set the frequency Example of a Hoqf setting procedureExample of operating a run from the panel HOQFSetting the frequency using the operation panel HOQF= or Frequency settingHow to operate the VF-FS1 Mccb Page Setting monitor mode Mode for setting inverter parameters Mode for monitoring all inverter statusBasic VF-FS1 operations Flow of status monitor mode How to set parameters Basic parameters Extended parameters User parametersHow to set the basic parameters Changes the parameter setting Saves the changed valueHow to set extended parameters Search and resetting of changed parameters I4W Example of parameter settingHow to search and reprogram parameters ITWSetting a parameter, using the wizard function CWH CEEHTH How to use the wizard function How Parameters of Quick setting wizardHow to use the history function CWJJgcf Parameters that cannot be changed while running CWReturning all parameters to standard default setting How to save/load the user setting parametersKpkv Page Setting acceleration/deceleration time Basic parametersAutomatic acceleration/deceleration Manually setting acceleration/deceleration time Methods of setting automatic acceleration/decelerationCWK Function Adjustment range Default setting Specifying an operation mode, using parameters UP/DOWNEOF UP/DOWN HOFRES PLC VIA VIB OFF Selection of operation mode Setting mode Switching of commands and referencesCommand mode selection Frequency setting mode selection Preset-speed operationMeter setting and adjustment Houn Meter selection HO Meter adjustmentHOUN= HounResolution Adjustment scale with parameter HO Meter adjustmentVF-FS1 Adjusting the meter in inverter stop state HOUN=Standard default setting VR Default settingProgrammed value E6581381 Forward/reverse run selection Operation panel operation HT Forward/reverse run selection Operation panel operationMaximum frequency Upper limit and lower limit frequenciesHJ Maximum frequency WN Upper limit frequency NN Lower limit frequencyBase frequency XN Base frequency XNX Base frequency voltageSelecting control mode RV V/F control mode selectionConstant torque characteristics Setting for fans and pumpsIncreasing starting torque Motor constant must be setPrecautions on vector control + Motor constant must be setEnergy-saving Operating a permanent magnet motorE6581381 Valid, Invalid Setting the electronic thermal Manual torque boost increasing torque boost at low speedsXD Torque boost Motor electronic thermal protection level QNO Setting value Overload protection Overload stall Inverter over load characteristics Motor 150%-overload time limit HPreset-speed operation speeds in 7 steps UT UT Preset-speed operation frequenciesThermal memory selection H UT UTUT UTBelow is an example of 7-step speed operation Low-speed signal Low-speed signal output frequencyExtended parameters Input/output parametersOutput of designated frequency reach signal Speed reach detection bandOutput of set frequency speed reach signal Designated frequencyInput signal selection Changing the functions of VIA terminal VIA terminal function selection Terminal function selection Keeping an input terminal function always active onModifying input terminal functions Setting of contact input terminal function Connection method 1 A-contact input Connection with transistor outputModifying output terminal functions Sink Negative logic / Source Positive logic inputExamples of application Assigning two functions to an output terminal Assigning one function to an output terminalRY RC RY-RC Holding the output of signals in on status Input terminal functionHdry Comparing the frequency command values FLA-FLB-FLCSwitching motor characteristics via terminal input Basic parametersSetting of switching terminals Frequency priority selectionAD2 VF2 MOT2 OCS2 OFF External switching Input terminal function 38 Fchg enabled Automatic switching by frequency commandSetting frequency command characteristics 10Vdc voltage input adjustment VIA, VIB VIA, VIB terminalsSetting of frequency with the input from an external contact Sample sequence diagram 1 Adjustment with continuous signals Adjustment with pulse signals Parameter-setting exampleAbout the setting of the initial up/down frequency Frequency adjustment rangeMinimum unit of frequency adjustment About the change of the initial up/down frequencyFine adjustment of frequency setting signal 2 Run/stop control with frequency setting signals Starting frequency settingOperation frequency Starting frequencyDC braking DC brakingOFF Jump frequency jumping resonant frequencies Bumpless operation Bumpless operation selectionPWM carrier frequency 0.75kW 15kW E6581381 Trip-less intensification Auto-restart Restart of coasting motor Auto-restart control selection Restarting motor during coasting Motor speed search function Motor speed search at startingInstantaneous power failure coast stop selection Instantaneous power failure coast stop selectionRetry function Retry selection Selecting the number of timesE6581381 Avoiding overvoltage tripping Output voltage adjustment/Supply voltage correction Canceling the operation command Reverse-run prohibitionDroop control  Droop gain  Droop insensitive torque bandE6581381 Conducting PID control External connectionSetting PID control Adjusting the PID control gain levelTypes of PID control interfaces P-gain adjustment parameter I-gain adjustment parameter D-gain adjustment parameter Adjusting analog command voltagesSetting the time elapsed before PID control starts Setting motor constants Setting motor constantsSet the auto-tuning parameter H to Auto-tuning enabled E6581381 Setting motor constants 2 Details E6581381 Acceleration/deceleration time Selecting an acceleration/deceleration patternSwitching acceleration/deceleration time 1 E6581381 Setting motor electronic thermal protection Protection functionsSetting current stall Stall prevention level Inverter trip retention  Inverter trip retention selection Emergency stop Emergency stop Emergency DC braking timeExternal trip stop via terminals Emergency stopping from the operation panelOutput phase failure detection Output phase failure detection mode selectionInput phase failure detection Control mode for small current Input phase failure detection mode selection Detection of output short-circuit Detection of output short-circuit during start-upOver-torque trip OFF On OFF Cumulative operation time alarm setting Cumulative operation time alarm settingOver-voltage stall protection level Over-voltage stall protection level Undervoltage trip/alarm selection Undervoltage tripTrip at VIA low level input mode Parts replacement alarms Trip at VIA low level input mode Motor PTC thermal protection Evasion from Overvoltage and Imput phase failure Forced fire-speed control function NNWNAdjustment parameters Example of settingCalibration of analog outputs Prohibition of key operations and parameter settings Resetting methodOperation panel parameter Changing the unit to a Current / voltage unit An example of setting when HJ is 80 and H is When H is not 0.00, and H is not 0 disabled Changing the steps in which the value displayed changes Free pressing a panel key once Free panel display Changing the item displayed by default Changing the display format while power is on Standard monitor display selection Integral output power Selection of operation panel stop patternDisplay of the head of the parameters Selection of operation panel stop patternTitle Setting of common function Error by disconnectionCommunication function Common serial Communication rate Communication function parameters Common serial options E6581381 Using the RS485 Setting the communication functionsTransmission specifications Example of connection for RS485-communicationWiring Parameters for options Permanent magnetic motorsPage Setting the operation frequency Applied operationHOQF HOQFP24 Hoqf Hoqf PLC VIA SS3 VIB RES Setting the operation mode RES SC/LCRES SC/LC PLC VIA VIB Status monitor mode Monitoring the operation statusStatus monitor under normal conditions LEDKK VIA RESPgtt ⇔ Display of detailed information on a past trip Display of trip information Trip code displayDisplay of trip information Display of trip information at the occurrence of a trip Example of call-up of trip informationInput terminal KK FE06 OFF Cause of the trip is displayed E6581381 Page How to cope with the CE directive Measures to satisfy the standardsAbout the EMC directive Measures to satisfy the EMC directive Three-phase 400V class Example of wiring About the low-voltage directiveCompliance with Installation Compliance with UL Standard and CSA StandardMeasures to satisfy the low-voltage directive Compliance with ConnectionAIC, Fuse and Wire sizes Motor thermal protectionAIC a Selection of wiring materials and devices Peripheral devicesSelection of wiring devices Input current aInstallation of a magnetic contactor Magnetic contactor in the primary circuitInstallation of an overload relay Magnetic contactor in the secondary circuitOptional external devices Page Table of parameters and data 11.1 User parameters11.2 Basic parameters Houn UT Extended parameters Input/output parametersFrequency parameters Operation mode parameters NNWN Torque boost parameters Acceleration/deceleration time parameters Protection parameters Output parameters Operation panel parametersCommunication parameters Default settings by inverter rating PM motor parametersTable of input terminal functions AD2OHN Table of output terminal functions LLNUCN Pidfn Order of precedence of combined functions Specifications Models and their standard specificationsStandard specifications Common specification Display Outside dimensions and mass Outside dimensions and massOutline drawing Fig.AFig.E Before making a service call Trip information and remedies Trip causes/warnings and remediesQR GTT QHH Restoring the inverter from a trip If the motor does not run while no trip message is displayed How to determine the causes of other problems How to cope with parameter setting-related problemsPage Inspection and maintenance Regular inspectionPeriodical inspection Check pointsCheck items Replacement of expendable parts Standard replacement cycles of principal parts Making a call for servicing Keeping the inverter in storagePage Warranty Disposal of the inverter Page 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