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Toshiba VF-A7  ：Motor shaft fixing control, Braking under normal conditions

Models: VF-A7

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Page 107

[D.C. braking under normal conditions]

(Forward/reverse DC braking priority control =[OFF])

: DC injection braking

Output frequency [Hz]

Set frequency



０

Reference frequency





0

Operating signal (F-CC)

			

〜〜〜〜

①

② ②

〜〜〜〜

〜〜〜〜



time [ｓ]

③

ON

OFF

① If  and  > reference frequency	: DC injection braking，
② If  > reference frequency > 	: Operation at command frequencies,
If  and  > reference frequency	: DC injection braking

③If an operation command is entered during D.C. braking : D.C. braking is discontinued to restart the operation.

[Priority to DC injection braking during forward/reverse operation] (Forward/reverse run D.C. braking priority control  =  (ON))

＝

Output frequency [Hz]



Set frequency 

＝





: DC injection braking



	０	〜〜
	０		time [ｓ]
			time [ｓ]
		④	⑥
	Reference frequency		⑤
	
		〜〜
	０	〜〜
	０		ON
			ON
	signal (F-CC)	〜〜	OFF
	signal (R-CC)		ON
	signal (R-CC)	〜〜	OFF
		〜〜	OFF

④During normal forward/reverse run(＝)：

Not recognized as a stop command, so that DC injection braking is not active. ⑤If a reverse run (or forward) command is entered during forward run (or reverse)

(＝)：DC injection braking starts when the frequency set with  exceeds the reference frequency during deceleration.

⑥If an operation command is entered during D.C. braking：priority is given to D.C. braking.

6.8.2 Motor shaft fixing control

 ：Motor shaft fixing control

・Function

This function is useful for preventing the motor shaft from rotating freely or for preheating the motor.

F-16

Image 107

Toshiba VF-A7 instruction manual  ：Motor shaft fixing control, Braking under normal conditions

Contents

Peripheral Units ConnectionBasic Parameters Extended Marking PrecautionsSymbols Meaning Limited applicationsHandling in general Transportation・Installation Wiring About operation Sticking warning labels When selecting the retry mode Applicable to invertersAbout inspection and maintenance About disposal of invertersⅡ． Preface FeaturesSpecial Type Form Specification code200V-3.7kW Package Name platePanel description Indication alphabet Panel indicationIndication number Page VFA7-2300P, 4300P VFA7-4370P1～4550P1 VFA7-2185P, 2220P VFA7-4185P, 4220PGrounding terminal Page Page P24 Detaching the terminal board front coverHigh-speed operation at a frequency of 60 Hz or over Comparison with commercial power operationAdjustment of overload protection level Operation in low speed rangesMotor with a braking system Braking of a motor after power shutoffLoad producing negative torque Use of an inverter at a voltage other than the rated one Power factor improving capacitorOver-current protective function Inverter capacityMeasures to be taken Power supply InverterInfluences of leakage currents and measures against it Power supply Installation environment Resistor Installation place InstallationFor closed-type Applicable Calorific valueHeat radiation area Required Motor Inverter Page Normal attachment Heat-sink going out attachment Simple type Heat-sink going out attachmentsimple typeInverter, or the inverter could cause a shock or a fire ConnectionPrevention of radio noise Control panel Standard connection diagram for sink logicminus commonStandard connection Motor Main circuitControl Circuit R46 R41 Control＊１ R20 R20 R46Main circuit terminals Explanation of terminalsR20 S20 P0, PA, PB, PC, PA1,PB1,PR1 Terminal symbolInverter internal circuit R0, S0 R46, R41, R20, S20Control circuit terminals sink logicminus common Connect a 1mAdc full-scale ammeter or a Output Default setting Operation frequency commandOutput Default setting Output current. Connect a 1mAdc Input Function Electrical Inverter internalCommon Programmable Inverter Controller Switching logicInput Common P24 Output Common CC Common InputSerial RS485 communication connector Could get a shock Motor is at a standstill, or you could get a shockSensor vector control Optional Control modes of the VF-A7 inverterExample of typical connection Simple operation of the VF-A7 1 Speed control mode1Operation from the terminalexternal signals ）Setting the frequency by a current signal 4 to 20 mA Frequency settingSpeed setting mode selection parameter  at  ）Setting the frequency by voltage signals 0 to 10Speed setting mode selection parameter  at  ）Setting the frequency by voltage signals 0 to 10 Vdc）Setting the frequency by voltage signals 0 to +/-10Vdc ：Start the motor Operation from the control panel ［Control panel operation］Example of control panel operation Selecting a stop mode with the control panelSetting a control mode Simple operation of the VF-A7 2 Torque control modeS4 Control mode Switching RR switching When the motor is out of operation. If the monitor displayMode setting parameter  is set at Running Polarity of torque command Start/stop Operation from the terminalexternal signalTorque command Torque control mode）Torque setting by means of a volume control Torque setting by means of current signals 4 to 20 mAdcTorque setting by means of voltage signals 0~10 Vdc ）Torque setting by means of voltage signals 0~10 Vdc Others Operation from the control panel Setting the start and stop modesSelecting a torque command mode Torque commandＳｔｏｐ：Stops the motor Set the torque commandExample of control panel operation ＲＵＮ：Starts the motorStatus monitor mode Setting monitor mode Setting parameters Setting monitor modeSpeed control mode Torque control modeProcedure for setting a basic parameter How to set basic parameters Basic parameterBasic parameter list Procedure for setting an extended parameter How to set extended parametersRunning frequency Example of parameter settingWhen the motor is out of operation.If the monitor Display mode setting parameter  is set atSearching for a parameter and changing its setting Basic parameters Parameters that cannot be changed during operationOptional analog terminal #2 meter adjustment FM terminal meter selection FM terminal meter adjustmentAM terminal meter adjustment Optional analog terminal #1 meter adjustment･ Function Setting the acceleration and deceleration timesAutomatic acceleration/deceleration  ＝Time s Manually setting the acceleration and deceleration timesChange the parameter setting to  automatic Acceleration/deceleration enabled by pressing key ：Automatic V/f mode setting Increasing starting torque/ energy-saving operation modeIf you fail to make the setting for vector control VF-A7 inverter has been set to this control mode by default Selecting an operation mode Preset speed operation Title Function Set value  Operation commandMode selection Speed setting modePanel stop pattern Speed setting Terminal FM-related parameters Setting and calibrating metersTitle Function Adjustment range ・FunctionCalibrating a meter when the inverter is out of operation ResolutionSet the parameter at  fixed output for meter By setup, before the needle of meter begins to swayReturn the parameter setting to  output current display Frequency display mode.If the monitor display mode settingHz standard setting  =  Factory default setting ：Standard setting mode selection Hz standard setting  = Clearing accumulating operation time  =  Factory default setting  = Reset of user-defined parameters  =  Trip clear  = ：Maximum frequency Parameter settingMaximum frequency ：Forward/reverse selection ：Base frequency #1 Upper and lower limit frequenciesBase frequency ：Upper limit frequency ：Lower limit frequencyMotor control Control mode selection：Motor control mode selection Constant torque characteristic Normal way of useAutomatically Setting suitable for fans and pumps：The torque Boost rate is adjusted To increase the starting torqueControl by pressing the key Value. Default setting Constant torqueChange the parameter setting to Sensorless vector        To set the V/F characteristic arbitrarily5-point setting ※100% adjustment value 200V class 200V,400V classThis control mode involves the setting of the motor constant  ～ Switching between speed control and torque control： Motor control mode selection Speed setting Binary/BCD inputoptional Torque reference Common serial communication option  Communication add-on cassette option Setting the electronic thermal protective functionParameter Title Function Adjustment range Manual boost  ～ %Overload stallSoft stall Setting the electronic thermal protective function Setting the motor overload protection level #1  Explanation of terms ×1.0 ×0.6 Setting of motor overload start level Overload reduction start-up  ～ Hz Motor 150%-overload time limit  Inverter overload characteristicInverters overload protective characteristic Start/stop Preset-speed operation 15 speedsSetting preset-speed frequencies Preset-speed #2 Forward run commandReverse run command Preset-speed #1Setting the operation mode ・Function Frequency signalsLow-speed signal ・Output terminal settingP24-OUT2 Putting out signals of arbitrary frequencies・Function Always-ON Selection of input signalsChanging standby signal function Standard=Stop ［ Disabled Terminal board has no priority ］Forward ReverseSetting value Jog run Priority command from terminal board Operation command terminal board has priority Enabled  Input terminal selection #8S4 Binary/BCD signal selectionExpansion TB option unit ：Binary/BCD signal selectionExpansion TB option unit Forced JOG forward rotationChanging input terminal functions Signal on completion of acceleration/deceleration OUTSelection of terminal functions Keeping an input terminal function always active onRefer to 7.2.3 for details Changing output terminal functionsResponse times of input/output terminals Refer to 7.2.2 for detailsBasic parameters #2 Setting of switching terminalsS1：V/f switching #1 S2：V/f switching #2 OFF S1V/f switching #1 S2V/f switching #2 Parameters selected has priority Speed/torque command gain and biasUsing two types of frequency speed commands  has priorityFrequency reference Command selected with  Setting frequency command characteristicsSetting torque reference characteristics 3 0Hz dead band frequency Operating by means of reference signalsOperation frequency Start-up frequency and End frequencyDC injection braking DC injection brakingForward/reverse DC braking priority control =OFF Motor shaft fixing control ：Motor shaft fixing control Braking under normal conditions ～ Hz Zero-speed stop mode selection ：Zero-speed stop mode selection LED display  lights  lightsExample of jog run Jog run ：Jog run frequency  ：Jog stop control  ～ HzRefer to 5.14 for details Preset-speed #8～15 ～  ：Preset-speed #8～#15 Jump frequency Jumping resonant frequencies PWM carrier frequencyTrip-less enhancement  ：PWM carrier frequencyRestart of coasting motor Motor speed search function Set the mode of Auto-restartRestart after a momentary power failure Set the control method of Auto-restartAdaptation for elevator applications 1Case ＝Case =～ Regenerative power ride-through control / Deceleration stopSet the property of Auto-restart Case = ：Retry selection Retry function ～ Ω Dynamic regenerative braking To urgently stop the motorAn internal braking resistor for 3.7kW model and smaller  Dynamic braking resistor capacity120W 70Ω 200 120W 40Ω 400 120W 150Ω 100 An external braking resistor optionalAny value Class Capacity kW ～ Ω Any value When using a braking resistor without thermal fuse PBR resistor capacity SupplyType Selection of braking resistor option and braking unitConnectable braking resistors and their minimum resistances Avoiding over-voltage trip Adjusting the output voltage and voltage compensation ：Reverse-run prohibition Prohibiting the reverse operation Speed at the drooping gain   ～ Hz Drooping controlDrooping Gain Dead band FrequencyFunction for crane/hoist Commercial power/inverter switching Timing chart Speed feedback/positioning control  ～  ：Preset speed operation modesPID control Refer to 5.2 for details of this setting Setting motor constantsSelection 1 Setting by the automatic V/f mode Set the auto-tuning ＝ Automatic tuning execution Press the Enter key to activate the parameter  Setting parameter  is set at Running frequencyChange the parameter setting to  Automatic tuning Motor is out of operation. If the monitor display momdeSetting the rating of the motor ①Slip frequency gain  Setting motor constantsInverter VFA7 2037PL Motor 7kW, 4P, 60Hz Selection Examples of setting auto-tuning～10Vdc ⇒ RR terminal Torque controlTorque reference ～20mAdc ⇒ II terminal⇒ RX terminal Voltage signal 0 ～± 10VdcTorque reference filter  ：Torque reference filterSetting of reverse speed limit level Speed limits in torque control modeSetting with the control panel Setting of forward speed limit level―― 40 ～20mA Setting by means of external signalsSelection of external signals Torque bias and load sharing gain× ＋  Voltage signals Current signalsSetting of regenerative torque SettingPower running /regenerative torque limit Setting of power running torqueLimiting the torque with external signals  Torque Limit #1 Regenerative Power runningPower running Regenerative Positive/negative torque limitsNegative torque limit  RRvolume/ voltagePositive torque limit Selection Regenerative  Torque LimitSuitable for the operation Slowly in weak-field areas where itSecondary acceleration/deceleration Motor needs to be speeded up toSelection with parameters Switching of acceleration/deceleration #1, 2, 3Acc/dec switching #1 Acc/dec switching #2 Output freq. Hz Setting freq ：Acceleration/deceleration lower limit Parameter settingMinimum acceleration/deceleration times Acceleration/deceleration patternsPattern run   ～ ＜Basic operating＞Monitor displayed during pattern run ④ ：select pattern group #4 Parameter setting Output frequency Hz Setting frequency Step trigger signalInverter trip holding Motor over road protection－level adjust / motor typesSetting of current stall Protection functionsEmergency stop by terminal operation Emergency stopOverload reduction start-up frequency Motors 150%-overload time limitOver-torque trip Detection of output phase failureAction at low currents  ：Cumulative operation time alarm setting Cooling fan control mode selectionCumulative operation time alarm  ：Cooling fan control modeUV stall level System-supporting sequence B-timerOver-voltage stall protection level Under-voltage tripSpecial analog input Additive over-ride Over-rideOutput frequency = Reference × 1 + Over-ride % Output frequency = Reference + Over-ride VI input HzOutput frequency = Reference + Over-rideVI input Hz Output frequency = Reference × 1 + Over-rideVI input %Pulse output to meters Setting of meter outputsSetting of optional meter outputs Meter outputControl panel parameters Prohibiting the change of parameter settings ：Prohibition of parameter setting  ：Current / voltage display modeDisplay of the speed of the load Display the motor speed and the load speed ：Frequency free unit magnification Display of the rotating speed of the motorTime  0.01 s Changing items displayed in status monitor modeSwitching basic parameters  ：Selection of panel V/f1, 2, 3 or ：Panel stop pattern Resetting the inverter from the control panel Panel reset function Selecting a control panel stop patternOverride in panel operation mode Canceling PID control in panel operation modeSetting a torque command in panel operation mode Drooping control in panel operation mode ：Panel operation prohibition SettingCanceling methods Restricting or prohibiting key operation＜Inter-drive communication＞ Communication function RS485/common serialCommon serial optional device ＜Computer link＞ Setting of operation command common serial Operation command ～ Mode selection Terminal block enabledUsing the RS485 port fitted as standard Inter-drive communications ：Wiring ：Data （Host→Inverter）：Wiring ：Data （Master→slave）  Setting of operation command RS485Setting of speed reference RS485 External Operation Operation with External SignalConnection method Setting of contact input terminal functionFunctions of input terminals in case of sink logic Control terminal boardExample of use Push-type operation stop InverterAcc/dec, V/f, torque limit #3 Table of contact input terminal function settingsAcc/dec, V/f, torque limit #2 Functions of output terminals in case of sink logic Setting of output terminal functionsSymbol Title Function Adjustment Default setting Low speed signalParameter setting Or detected OFF All the alarms above are cancelledOFF in positive logic Output of the designated data in 7 bitsOver travel On Over running Completion of positioning On Positioning has been completedAnalog input filter Setup of input/output terminal operation timeSetup of response time Response time settingControl terminal board Setup of external speed command analog signalSetting of analog input terminal functions ～ Setup by analog input signals RR terminalTitle Function Adjustment range  10V VI terminal Setup by analog input signals VI/II terminalSetup by analog input signals RX terminal Status monitor Status monitor modeInformation on input terminals   Information on output terminalsType of connected option Total accumulated operation hoursChanging status monitor function Changing indication of status with power onChanging contents of status monitor indication 1kW FE30 Output power 01kW Details of indications of trip status Indication in trip statusExamples of reading out trip data Indication of alarm, pre-alarm, etc Failure, short-circuit or electric leak Selection of wiring equipmentInverter model Selection of wiring equipmentElectromagnetic contactor in the primary circuit Installation of electromagnetic contactorElectromagnetic contactor in the secondary circuit Installation of overload relayVF-A7 Application and functions of optionsSorts of separate-type options Motor end surge RS-232C ⑬ communication converter unit Model RS2001Z RS-232C Communication Converter cable Selection table of separate-type options Table of optional add-on cassettes Optional add-on cassettesTable of optional add-on cassettes Functions of optional add-on cassettes＊ In a set with SBP002Z ②Expansion TB option unit＊ In a set with SBP001Z Functions of board options Installation of board optionBoard options Table of board optionsMandatory Before installing optional add-on cassette or board optionCase Preparation is not needed Case 2-A. When PG feedback function is usedPrepare for installing according to 9.7.1, 1 to Case 2-B. When PG feedback function is mot usedBasic parameters 1/2 Basic parameters 2/2 Terminal function selection 1/2 Frequency signalInput signal selection Extended parametersTerminal function selection 2/2 Terminal response time setupBasic parameters #2 Point SettingSpeed/torque reference gain/bias setup 1/2 Operation Speed/torque reference gain/bias setup 2/2Operation frequency BrakingPWM carrier frequency Preset speed operation frequency 8- to 15-stage speedTripless intensification setup 1/2 Jumper frequencyFor lift 1/2 Tripless intensification setup 2/2Control Speed feedback/positioning control Commercial/inverter switching functionFunctions for lift 2/2 PID controlVector control Preset-speed operation modeTorque control Motor constantTorque limit Speed/torque reference gain/bias setup #21/2Secondary acceleration/deceleration Speed/torque reference gain/bias setup #22/2 Pattern run selection Disabled, 1 EnabledPattern run mode Patterned operation canceled during stop Preset-speed #2 operation time Ditto Preset-speed #1 operationContinuation mode Preset-speed #1 operation time ～8000 s / minProtection functions Meter output 1/2 Special analog inputOver-ride Control Panel parameters Meter output 2/2Communication function1/2 Reservation area Communication function2/2［Contents of monitor indications］ Monitor FM/AM/pulse output function selection Input terminal function setting 1/2 106 107 VI/II terminal priority 108 109 ［Input terminal function setting 2/2］= = =～ = 104 105［Output terminal function setting 1/2］［Output terminal function setting 2/2］ PWM Default settingsStandard specifications by types Standard specifications by types large capacity types Common specifications Digit FaultProcess, upper/lower limits CausesExternal dimensions and mass External dimensions and massDrawing E Drawing F Outline drawingsDrawing a Drawing B Drawing C Drawing DDimensions for heat-sink going out attachmentsimple type ･ Extend acceleration time #1  Indication Contents Expected causes Countermeasures･ Decrease setting value Also reset the  Main ROM fault ･ Reset the inverter Initial read-error  Main RAM fault･ If undervoltage is detected, set Presence or absence of parameter trip can be selectedSetting signal apart from each ～ Caution! ～ Method of resetting causes of tripRUN/STOP key Is input power Input power Correct?Make a service call Is LED onMeasures against trouble with parameter setting How to check other troublesBy feel touch Regular inspectionCheck points Inspection method･Dont replace any component part Dealer for replacement of partPeriodical inspection Points of inspectionStandard period of years to replace main component parts Replacement of expendable partsWhen retaining the inverter out of operation When making a service callWarranty Disposing manner Blasting during incinerationPlastics