Avoiding overvoltage tripping | Toshiba VF-S9 guide

E6580757

4) Minimum resistances of connectable braking resistors

The minimum allowable resistance values of the externally connectable braking resistors are listed in the ta- ble below.

Do not connect braking resistors with smaller resultant resistances than the listed minimum allowable resis- tance values.

Inverter rated	200V class		400V class
output capacity	Resistance of	Minimum allowable	Resistance of	Minimum allowable
(kW)	standard option	resistance	standard option	resistance

0.2	200Ω	63Ω	-	-
0.4	200Ω	63Ω	-	-
0.75	200Ω	42Ω	200Ω	99Ω
1.5	75Ω	30Ω	200Ω	99Ω
2.2	75Ω	30Ω	200Ω	73Ω
3.7	40Ω	24Ω	160Ω	73Ω
5.5	20Ω	10Ω	80Ω	44Ω
7.5	15Ω	10Ω	60Ω	44Ω
11	10Ω	7Ω	40Ω	22Ω
15	7.5Ω	7Ω	30Ω	22Ω

6.12.5			Avoiding overvoltage tripping
6				: Overvoltage limit operation
		•	Function
			This parameter keeps the output frequency constant or increases the frequency to prevent overvolt-
			age tripping due to increases in DC voltage during deceleration or constant-speed operation. The
			deceleration time during overvoltage limit operation may increase above the designated time.
			Overvoltage limiting level
	Output
		frequency
	DC voltage					Overvoltage limiting level
	DC voltage
		[Parameter setting]
			Title		Function		Adjustment range	Default setting

				Overvoltage limit operation			0: Enabled	0
				Overvoltage limit operation			1: Prohibited	0
							1: Prohibited

F-30

Image 114

Toshiba VF-S9 manual Avoiding overvoltage tripping, Minimum resistances of connectable braking resistors

Contents

Tosvert VF-S9 Contents E6580757 Iii Safety precautions Safety precautionsMeanings of symbols 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 Read first Check product purchaseMandatory Contents of the product code Names and functions Outside view Charge lamp Terminal board cover E6580757 Main circuit and control circuit terminal boards 2022PL 2015PM VFS9-2022PM/2037PM VFS9-4007PL ∼ 4037PL VFS9-2055PL/2075PL 4055PL/4075PL How to open the front terminal board cover See 2.3.2 for details on all terminal functions Motors Occurrence of instability Braking a motor when cutting off power supplyExtremely low loads and low inertia loads Loads that generate negative torque Protecting inverters from overcurrent Power factor improving capacitorsInverters Inverter capacity Circuit interupting fuse What to do about leak currentEffects of leak current across ground MCCBn+1 INVn Ffects of leak current across lines PowerRemedies Supply Use the electronic thermal built into the inverter Continuous operation this may result in fire InstallationInstallation environment Not examples for resistance to fire or explosion Consult with Toshiba about these measures How to install Installation location Cabinet must be ventilated and cooled Inverter Type Installing more than one unit in a cabinet Connection equipment Control and main power supply WiringPreventing radio noise Standard connections Standard connection diagram 1 sink common CC This diagram shows a standard wiring of the main circuit Standard connection diagram 2 source common P24 VF-S9 Main circuit terminals Power supply and motor connectionsDescription of terminals Connections with peripheral equipment Control circuit terminals sink logic Main circuit Put. Standard default setting output cur 1mA full-scale dc Input Standard default setting 0~10Vdc input Internal imped~60Hz60Hz setting frequency By jumper JP302 switching Full scale DC am Output Detects the operation of the inverters 30Vdc-1A Multifunction programmable relay contact= 1, 30Vdc-1A, 250Vac-1A cos φ = At resistance load During protection function operation Input Common Output Logic switching/voltage-current output switching jumper Operations Motor How to operate the VF-S9Wiring Main circuit E6580757 Mccb Motor Adjustment range Simplified Operation of the VF-S9Monitor display selection Is set to How to start and stop How to set the frequency Moves the frequency down Setting the frequency using the operation panelExample of operating a run from the panel Potentiometer E6580757 Basic VF-S9 operations Setting monitor mode Mode for setting inverter parametersStatus monitor mode Mode for monitoring all inverter status VF-S9 has the following three monitor modes How to set parameters Setting monitor mode How to set the basic parameters Press the Enter key to save the changed maximum frequency How to set extended parameters Key and the key to select Search and resetting of changed parameters Example of parameter settingKey to change the dynamic braking selection from How to search and reprogram parameters How to program setup parameters Returning all parameters to standard default setting Command mode selection Set , and and canParameters that cannot be changed while running Key operated LED display Operation Key or the key to change the set value. To return toPressing the Enter key displays Automatic acceleration/deceleration Setting acceleration/deceleration timeBasic parameters Set automatic acceleration/deceleration to or Acceleration time Seconds Manually setting acceleration/deceleration timeParameter setting Title Function Adjustment range Deceleration time Seconds Increasing starting torque Automatic torque boost If auto-tuning error Appears, see 6.13 Automatic torque boost and V/F control mode selectionSet V/F control mode selection to 0 V/F constant Auto Automatic environment setting Setting environmental protectionSetting parameters by operating method Automatic function setting VIA/II UP/DOWN Command mode selection Selection of operation modeCommand mode selection Frequency setting mode selection Title Function Adjustment range Meter setting and adjustment Preset-speed operationMeter selection Meter adjustment Example of 4-20mA programmed output for details, see Adjustment scale with meter adjustment parameterResolution Connect meters as shown below Default setting Standard default settingAdjusting the meter in inverter stop state Tion Is set to Selecting forward and reverse runs operation panel only Setting valuesParameter setting Forward/reverse run selection Maximum frequency Maximum frequencyUpper limit and lower limit frequencies Upper limit frequency Lower limit frequency Base frequency Base frequencyBase frequency 25 ∼ 400 Hz Time Selecting control modeControl mode selection Selection Constant torque characteristics general method of use Setting for fans and pumps Motor constant must be set Setting V/F control selection Automatic torque boostIncreasing starting torque This gives steady torque for stable runs Sorless vector control Precautions on vector controlEnergy-saving Somewhat lower Setting the electronic thermal Manual torque boost increasing torque at low speedsTorque boost Protection Stall Title Function Adjustment range Default settingOverload Motor electronic thermal pro Setting of motor electronic thermal protection level Default setting 100% Press Key to change the parameter to Setting the motor electronic thermal protection level Setting value Overload protection Overload stall Preset-speed operation frequencies 1~7 Preset-speed operation speeds in 15 stepsInverter over load characteristics Preset-speed operation frequencies 8~15 Terminal functions are as follows Terminal S1 Preset-speedS3-CC =6 SS1 Using other speed commands with preset-speed command Example of 7-step speed operation Low-speed signal output frequency ∼ Hz Low-speed signalLow-speed signal output frequency Extended parameters Output of designated frequency reach signal Parameter setting of output terminal selectionSpeed reach detection band Parameter setting of set frequency and detection band Output of set frequency speed reach signalSpeed reach setting frequency Speed reach detection band Title Function Adjustment range Setting Input signal selection Changing the standby signal functionST standby signal selection Setting the reset signal Modifying input terminal functions Terminal function selectionKeeping an input terminal function always active on Always-active function selection Input terminal selection 3 RST Reset Setting of contact input terminal functionTerminal Title Function Adjustment range Default setting Connection method Contact input Sink logic Sink logic/source logic input Example of application ... Three-wire operationCase of three-wire operation Set to Input terminal selection Examples of application Setting of output terminal functionModifying output terminal functions Output terminal selection Switching motor characteristics via terminal input Setting of switching terminalsBasic parameters Automatic frequency switching Frequency priority selection External contact UP/DOWN External switching Fchg enabledSet frequency is cleared automatically after power-off Contact input. See Setting frequency command characteristics 10Vdc voltage input adjustment VIA, VIB 20mAdc current input adjustment Sample sequence diagram 1 Adjustment with continuous signals Adjustment with pulse signals Parameter-setting example Minimum unit of frequency adjustment Sample sequence diagram 2 Adjustment with pulse signalsFrequency adjustment range Simultaneous input Starting frequency Starting frequency settingOperation frequency Function Frequency set with the parameter 2 Run/stop control with frequency setting signals DC brakingDC braking Jog run mode Jog run frequency Jog run stopping patternDC braking time 20.0 sec Jog run setting Jump frequency jumping resonant frequencies Jump frequency Jumping width Jump frequency 3 Jumping width Random mode Preset-speed operation frequency 8 to∼ Preset-speed operation frequency 8 to PWM carrier frequency Trip-less intensification Auto-restart Restart during coastingAuto-restart control selection Restarting motor during coasting Motor speed search function DC braking during restart If momentary power failure occurs Regenerative power ride-through controlRegenerative power ride-through control Application Canceling conditions Retry functionRetry selection Dynamic regenerative braking Dynamic braking selection Braking resistor operation rate Connecting an external braking resistor optional Parameter setting Title FunctionSeparate-type optional resistor with thermal fuse Setting the braking resistor operation rate 12.5 Avoiding overvoltage tripping Minimum resistances of connectable braking resistorsOvervoltage limit operation Output voltage adjustment/Supply voltage correction To the base frequency So that no Output voltage unlimited 100.0 Integral gain Conducting PI controlExternal connection 100.0 Gain adjustment parameter Setting PI controlAdjusting the PI control gain level Types of PI control interfaces Adjusting analog command voltages Set the auto-tuning parameter to Setting motor constantsSelection 1 Setting by automatic torque boost See .2 for details of the setting method Rameters Auto-tuning Application of individual settings Perform adjustments according to the actual operation To the actual operation Deceleration time 3600 s Acceleration time 3600 s Acceleration/deceleration patterns Linear acceleration/deceleration Switching to acceleration/deceleration Selection using parameters Setting motor electronic thermal protection Protection functions Stall prevention level Setting current stallInverter trip retention Inverter trip retention selection Is set to Emergency DC braking, also set External input trip stop mode selectionExternal trip stop via terminals Emergency DC braking time Failure detection signal generated FL relay deactivated Output phase failure detectionOutput phase failure detection mode selection Emergency stopping from the operation panel Input phase failure detection Control mode for small currentInput phase failure detection mode selection Over-torque trip Specified time Title Function Adjustment rangeDisabled Enabled Over-torque trip/alarm level ∼ 250 % Level flows for more than Output terminal function 12 OT Over-torque detection Detection signalNo trip Over-torque detection Pre-alarm signal No trip Over-torque Undervoltage trip selection Undervoltage trip15.10 4-20mA dc calibration Meter bias Prohibition of change of parameter settings Prohibition of change of parameter settingsExamples of setting Setting methods Unit selection Resetting methodChanging the display unit to A/V/min-1 Free unit selection Display in percentage terms Display in amperes/volts Changing the status monitor display format Changing the display format while power is onStandard monitor mode ⇒ Standard monitor display selection Standard monitor display selection Communication function Common serial Transmission specifications Using the RS232C/RS485Setting the communication functions Communication function parameters Common serial options Next data Use the terminal board to branch the cable Command by communicating independentlyExample of connection for RS485-communication Number, to the host computer Setting the operation frequency Operation panel key settingApplied operation S1 UP S2 Down S3 CLR To switch to VIA/II setting, use the external PNL/TB Preset-speed settingSwitching between external contact UP/DOWN VIA input S1FCHG Setting by means of a remote input device Switching between analog setting and preset-speed settingSignal Voltage signal Operation is controlled in accordance with Setting Setting the operation mode Terminal board operation Eration holding S1 terminal set to Case of three wire operation Set toEnable to run at HD on Operation, inverter stop S2 PNL/TB VIA VIB Operation from an external input device OFF LED Display of trip information Display of trip information Example of call-up of trip information E6580757 How to cope with the CE directive Taking measures to satisfy the CE/UL directiveAbout the EMC directive Measures to satisfy the EMC directive Example of wiring Single-phase 200V class Inverter satisfies the low-voltage directive About the low-voltage directiveMeasures to satisfy the low-voltage directive Plate. Refer to the .1 for earth cable sizes Selection of wiring materials and devices Peripheral devices Selection of wiring devices Installation of a magnetic contactor Magnetic contactor in the primary circuitMagnetic contactor in the secondary circuit Installation of an overload relay Optional external devices Or less Input AC reactor DC reactor Effect Reactor type Power factor Harmonics Suppression200V-3.7kW Improvement Other model Actor effective for external surge suppression Model PWU001Z Extension panel Ward/reverse switch Model CBVR-7B1Parameter writer UP/DOWN key, Monitor key, and Enter key Model RKP001Z Devices Input AC re Actor DCL Devices External dimensions and connections Foot Mounted Noise filter Devices External dimensions and connections Braking Resistor Sion panel Devices External dimensions and connections ParameterWriter Exten Communica Four automatic functions Table of parameters and dataUser parameters Other Basic parameters Extended parameters Input/output parameters Frequency parameters VIB, VIA/II 0213 VIB input point 400 Frequency Frequency Down Operation mode parameters Torque boost parameters Acceleration/deceleration time parametersProtection parameters Operation panel parameters Communication parameters Default settings by inverter rating Table of input terminal functions 1/3 Table of input terminal functions 2/3 ST+PNL/TB Table of input terminal functions 3/3 Table of output terminal functions 1/2 Table of output terminal functions 2/2 POL Order of precedence of combined functions Specifications Models and their standard specificationsStandard specifications Specification Outside dimensions and mass Outside dimensions and mass Fig.A Plate Before making a service call Trip information and remedies Trip causes/warnings and remedies Problem Possible causes Remedies Overvoltage during Problem Possible causes Remedies Small-current opera Process of initializa Values 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 problems Inspection and maintenance Regular inspection Check items Periodical inspectionCheck points Call the local sales agency Replacement of expendable parts Standard replacement cycles of principal parts Making a call for servicingKeeping the inverter in storage Warranty Disposal of the inverter Toshiba Corporation