Avoiding overvoltage tripping | Toshiba VF-FS1 specification

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.

F-36

Image 132

Toshiba VF-FS1 instruction manual Avoiding overvoltage tripping

Contents

Industrial Inverter Page Safety precautions Meanings of symbolsSafety precautions Explanation of markings General Operation Transportation & installation Wiring Operations When retry function is selected inverter Maintenance and inspection Disposal Attach warning labels Features II. Introduction  Contents  E6581381 Iii Read first Check product purchase Contents of the product Names and functions Outside view Bottom Power circuit and control circuit terminal boards Power circuit terminal board VFFS1-2004 ∼ 2037PM VFFS1-4004 ∼ 4055PL E6581381 E6581381 Grounding capacitor disconnecting switch and taps Control circuit terminal board AWG How 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 torque Inverters Braking motorMeasures to protect motors against surge voltages Protecting inverters from overcurrent Power factor correction capacitor If power supply distortion is not negligibleOperating at other than rated voltage MCCB1 What to do about the leak current Effects of leak current across groundRemedies Elcb Affects of leakage current across lines Installation Installation environment 5cm How to install Standard installation Side-by-side installation Operating motor Calorific Values w Installing more than one unit in a cabinet Page Connection Control and main power supply WiringStandard connections Preventing radio noise Standard connection diagram Standard connection diagram Power circuit terminals Description of terminals Power circuit Control circuit terminalsControl circuit terminals VIA VIB FLA 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 stop How to set the frequency Example of a Hoqf setting procedureExample of operating a run from the panel HOQF Setting the frequency using the operation panel HOQF= or Frequency setting How 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 parameters How to set the basic parameters Changes the parameter setting Saves the changed value How to set extended parameters Search and resetting of changed parameters I4W Example of parameter settingHow to search and reprogram parameters ITW Setting a parameter, using the wizard function CWH CEEHTH How to use the wizard function How Parameters of Quick setting wizard How to use the history function CWJJgcf Parameters that cannot be changed while running CW Returning 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 HOF RES PLC VIA VIB OFF Selection of operation mode Setting mode Switching of commands and references Command mode selection Frequency setting mode selection Preset-speed operation Meter setting and adjustment Houn Meter selection HO Meter adjustmentHOUN= Houn Resolution 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 operation Maximum frequency Upper limit and lower limit frequenciesHJ Maximum frequency WN Upper limit frequency NN Lower limit frequency Base frequency XN Base frequency XNX Base frequency voltage Selecting control mode RV V/F control mode selection Constant torque characteristics Setting for fans and pumps Increasing starting torque Motor constant must be set Precautions on vector control + Motor constant must be setEnergy-saving Operating a permanent magnet motor E6581381 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 H Preset-speed operation speeds in 7 steps UT UT Preset-speed operation frequenciesThermal memory selection H UT UTUT UT Below is an example of 7-step speed operation Low-speed signal Low-speed signal output frequencyExtended parameters Input/output parameters Output of designated frequency reach signal Speed reach detection band Output of set frequency speed reach signal Designated frequency Input 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 output Modifying 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-FLC Switching motor characteristics via terminal input Basic parameters Setting of switching terminals Frequency priority selectionAD2 VF2 MOT2 OCS2 OFF External switching Input terminal function 38 Fchg enabled Automatic switching by frequency command Setting frequency command characteristics 10Vdc voltage input adjustment VIA, VIB VIA, VIB terminals Setting of frequency with the input from an external contact Sample sequence diagram 1 Adjustment with continuous signals Adjustment with pulse signals Parameter-setting example About the setting of the initial up/down frequency Frequency adjustment rangeMinimum unit of frequency adjustment About the change of the initial up/down frequency Fine adjustment of frequency setting signal 2 Run/stop control with frequency setting signals Starting frequency settingOperation frequency Starting frequency DC braking DC braking OFF Jump frequency jumping resonant frequencies Bumpless operation Bumpless operation selection PWM 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 starting Instantaneous power failure coast stop selection Instantaneous power failure coast stop selection Retry function Retry selection Selecting the number of times E6581381 Avoiding overvoltage tripping Output voltage adjustment/Supply voltage correction Canceling the operation command Reverse-run prohibition Droop control  Droop gain  Droop insensitive torque band E6581381 Conducting PID control External connection Setting 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 constants Set the auto-tuning parameter H to Auto-tuning enabled E6581381 Setting motor constants 2 Details E6581381 Acceleration/deceleration time Selecting an acceleration/deceleration pattern Switching acceleration/deceleration time 1 E6581381 Setting motor electronic thermal protection Protection functions Setting 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 panel Output phase failure detection Output phase failure detection mode selection Input 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-up Over-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 trip Trip 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 NNWN Adjustment 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 pattern Title 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-communication Wiring Parameters for options Permanent magnetic motorsPage Setting the operation frequency Applied operationHOQF HOQF P24 Hoqf Hoqf PLC VIA SS3 VIB RES Setting the operation mode RES SC/LC RES SC/LC PLC VIA VIB Status monitor mode Monitoring the operation statusStatus monitor under normal conditions LED KK VIA RES Pgtt ⇔ 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 information Input 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 directive Compliance with Installation Compliance with UL Standard and CSA StandardMeasures to satisfy the low-voltage directive Compliance with Connection AIC, Fuse and Wire sizes Motor thermal protectionAIC a Selection of wiring materials and devices Peripheral devices Selection of wiring devices Input current a Installation of a magnetic contactor Magnetic contactor in the primary circuit Installation of an overload relay Magnetic contactor in the secondary circuit Optional external devices Page Table of parameters and data 11.1 User parameters11.2 Basic parameters Houn UT Extended parameters Input/output parameters Frequency parameters Operation mode parameters NNWN Torque boost parameters Acceleration/deceleration time parameters Protection parameters Output parameters Operation panel parameters Communication parameters Default settings by inverter rating PM motor parameters Table of input terminal functions AD2 OHN Table of output terminal functions LLN UCN Pidfn Order of precedence of combined functions Specifications Models and their standard specificationsStandard specifications Common specification Display Outside dimensions and mass Outside dimensions and mass Outline drawing Fig.A Fig.E Before making a service call Trip information and remedies Trip causes/warnings and remedies QR 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 inspection Periodical 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 Toshiba