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MITSUBISHI ELECTRIC
Frequency Inverter
Installation Guideline
FR-A741-5.5K to 55K
Art. No. 224739
INDUSTRIAL AUTOMATION
MITSUBISHI ELECTRIC
08 04 2009
Version A

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  • Page 1 MITSUBISHI ELECTRIC Frequency Inverter Installation Guideline FR-A741-5.5K to 55K Art. No. 224739 INDUSTRIAL AUTOMATION MITSUBISHI ELECTRIC 08 04 2009 Version A...
  • Page 3: Table Of Contents

    Thank you for choosing this Mitsubishi Inverter. Please read through this Installation Manual and the Instruction Manual to operate this inverter correctly Do not use this product until you have a full knowledge of the equipment, the safety information and the instructions.
  • Page 4 Print Date Manual Number Revision 04/2009 pdp-gb 224739 First edition For Maximum Safety Mitsubishi transistorized inverters are not designed or manufactured to be used in equipment or systems in situations that can affect or endanger human life. When considering this product for operation in special applications such as machinery or systems used in passenger transportation, medical, aerospace, atomic power, electric power, or submarine repeating applications, please contact your nearest Mitsubishi sales representative.
  • Page 5 This section is specifically about safety matters Do not attempt to install, operate, maintain or inspect the inverter until you have read through this Installation Guideline and appended documents carefully and can use the equipment correctly. Do not use the inverter until you have a full knowledge of the equipment, safety information and instructions.
  • Page 6 Wiring CAUTION Do not install assemblies or components (e. g. power factor correction capacitors) on the inverter output side, which are not approved from Mitsubishi. The direction of rotation of the motor corresponds to the direction of rotation commands (STF/STR) only if the phase sequence (U, V, W) is maintained.
  • Page 7: Installation Of The Inverter And Instructions

    1 INSTALLATION OF THE INVERTER AND INSTRUCTIONS Unpack the inverter and check the capacity plate on the front cover and the rating plate on the inverter side face to ensure that the product agrees with your order and the inverter is intact. 1.1 Inverter Type A741 Rating plate example...
  • Page 8 INSTALLATION OF THE INVERTER AND INSTRUCTIONS 1.3 General Precaution The bus capacitor discharge time is 10 minutes. Before starting wiring or inspection, switch power off, wait for more than 10 minutes, and check for residual voltage between terminal P/+ and N/− with a meter etc., to avoid a hazard of electrical shock.
  • Page 9: Outline Dimension Drawing

    2 OUTLINE DIMENSION DRAWING (Unit: mm) Inverter Type FR-A741-5.5K FR-A741-7.5K FR-A741-11K FR-A741-15K FR-A741-18.5K FR-A741-22K FR-A741-30K FR-A741-37K FR-A741-45K FR-A741-55K...
  • Page 10: Wiring

    3 WIRING 3.1 Terminal connection diagram Source logic Main circuit terminal *1 Do not connect any options to P/+ and N/−. Control circuit terminal 3-phase AC power supply Motor Jumper *2 To supply power to the Main circuit control circuit separately, Earth remove the jumper across Control circuit...
  • Page 11 WIRING 3.2 Main circuit terminal specifications 3.2.1 Terminal arrangement of the main circuit terminal, power supply and the motor wiring FR-A741-5.5K, 7.5K FR-A741-11K, 15K Screw size (M4) Charge lamp Screw size (M4) Jumper Charge lamp Jumper Screw size (M4) Screw size (M5)
  • Page 12 The following table indicates a selection example for the wiring length of 20m. 400V class (when input power supply is 440V) Crimping Terminal Tightening Torque Applicable Inverter Type Terminal Screw Size * [Nm] R/L1, S/L2, T/L3, P1, + U, V, W FR-A741-5.5K FR-A741-7.5K 5.5-4 5.5-4 FR-A741-11K 5.5-5 5.5-5 FR-A741-15K FR-A741-18.5K...
  • Page 13 WIRING 3.3.2 Maximum permissible motor wiring length The overall wiring length for connection of a single motor or multiple motors should be within 500m. (The wiring length should be 100m maximum for vector control.) The lengths in the following table are for unshielded cables. When shielded cables are used divide the values listed in the table by 2.
  • Page 14 WIRING 3.4 Control circuit specification 3.4.1 Standard control circuit terminal layout Terminal screw size: M3.5 Tightening torque: 1.2Nm 3.4.2 Wiring instruction Terminals PC, 5, and SE are all common terminals (0V) for I/O signals and are isolated from each other. Avoid connecting the terminal PC and 5 and the terminal SE and 5 (ground).
  • Page 15: Precautions For The Useof The Inverter

    4 PRECAUTIONS FOR USE OF THE INVERTER The FR-A701 series is a highly reliable product, but incorrect peripheral circuit making or operation/handling method may shorten the product life or damage the product. Before starting operation, always recheck the following items. Use crimping terminals with insulation sleeve to wire the power supply and motor.
  • Page 16 PRECAUTIONS FOR USE OF THE INVERTER Instructions for overload operation When performing operation of frequent start/stop of the inverter, increase/decrease in the temperature of the transistor element of the inverter may repeat due to a continuous flow of large current, shortening the life from thermal fatigue. Since thermal fatigue is related to the amount of current, the life can be increased by reducing bound current, starting current, etc.
  • Page 17: Failsafe Of The System Which Uses The Inverter

    5 FAILSAFE OF THE SYSTEM WHICH USES THE INVERTER When a fault occurs, the inverter trips to output a fault signal. However, a fault output signal may not be output at an inverter fault occurrence when the detection circuit or output circuit fails, etc. Although Mitsubishi assures best quality products, provide an interlock which uses inverter status output signals to prevent accidents such as damage to machine when the inverter fails for some reason and at the same time consider the system configuration where failsafe from outside the inverter, without using the inverter, is enabled even if the inverter fails.
  • Page 18: Parameter

    6 PARAMETER For simple variable-speed operation of the inverter, the initial setting of the parameters may be used as they are. Set the necessary parameters to meet the load and operational specifications. Parameter setting, change and check can be made from the operation panel.
  • Page 19 PARAMETER Parameter Name Setting Range Initial Value Parameter Name Setting Range Initial Value Second output Rated motor voltage 0 to 1000V 400V 0 to 400Hz 30Hz frequency detection Rated motor 10 to 120Hz 60Hz Second electronic frequency 0 to 500A, 9999 9999 thermal O/L relay Speed control gain...
  • Page 20 PARAMETER Parameter Name Setting Range Initial Value Parameter Name Setting Range Initial Value PU communication Stall prevention 0, 1, 10, 11 0 to 220% 150% stop bit length level at 0V input PU communication Stall prevention 0, 1, 2 0 to 220% 200% parity check level at 10V input...
  • Page 21 PARAMETER Parameter Name Setting Range Initial Value Parameter Name Setting Range Initial Value User group clear 0 to 999, 9999 9999 Rated slip 0 to 50%, 9999 9999 0 to 9, 12 to 20, Slip compensa- STF terminal function 22 to 28, 42 to tion time con- 0.01 to 10s 0,5s...
  • Page 22 PARAMETER Parameter Name Setting Range Initial Value Parameter Name Setting Range Initial Value Brake opening RS-485 commu- 0 to 30Hz frequency nication CR/LF 0, 1, 2 selection Brake opening 0 to 220% 130% current Communication EEPROM write 0, 1 Brake opening selection current detec- 0 to 2s...
  • Page 23 PARAMETER Parameter Name Setting Range Initial Value Parameter Name Setting Range Initial Value Acceleration S- 0 to 8, 13 to 18, 0 to 50% pattern 1 Second applied 30, 33, 34, 40, 9999 motor 43, 44, 50, 53, Deceleration S- 0 to 50% 54, 9999 pattern 1...
  • Page 24 PARAMETER Parameter Name Setting Range Initial Value Parameter Name Setting Range Initial Value Protocol selec- Lower 4 digits 0 to 9999 0, 1 tion NET mode opera- tion command 0, 1, 9999 9999 Upper 4 digits 0 to 9999 source selection PU mode opera- Lower 4 digits 0 to 9999...
  • Page 25 PARAMETER Parameter Name Setting Range Initial Value Parameter Name Setting Range Initial Value Torque limit input Torque bias 0, 1 0 to 3, 9999 9999 method selection selection Set resolution Torque bias 1 0, 1, 10, 11 switchover 600 to 1400%, Torque bias 2 9999 Torque limit level...
  • Page 26 PARAMETER Parameter Name Setting Range Initial Value Parameter Name Setting Range Initial Value Speed feed for- FM terminal ward control/ — — calibration (900) model adaptive 0, 1, 2 speed control selection AM terminal — — calibration (901) Speed feed for- 0 to 1s ward filter Terminal 2 frequency...
  • Page 27 PARAMETER Parameter Name Setting Range Initial Value Parameter Name Setting Range Initial Value PU buzzer control 0, 1 Terminal 4 bias 0 to 300% (torque/magnetic flux) (932) PU contrast 0 to 63 adjustment Terminal 4 gain com- Pr.CL Parameter clear 0, 1 mand (torque/mag- 0 to 400%...
  • Page 28: Troubleshooting

    7 TROUBLESHOOTING When an fault occurs in the inverter, the protective function is activated bringing the inverter to an alarm stop and the PU display automatically changes to any of the following fault (alarm) indications. If your fault does not correspond to any of the following faults or if you have any other problem, please contact your sales representative.
  • Page 29 TROUBLESHOOTING 7.2 List of alarm display Operation Panel Indication Meaning Operation Panel Indication Meaning E - - - Faults history E.PTC* PTC thermistor operation HOLD Operation panel lock E.OPT Option alarm E.OP3 Communication option alarm Er1 to 4 Parameter write error E.1 to Option fault rE1 to...
  • Page 30: Aappendix

    A APPENDIX A.1 Instructions for Compliance with the European Directives A.1.1 EMC Directive Our view of transistorized inverters for the EMC Directive A transistorized inverter is a component designed for installation in an enclosure and for use with the other equipment to control the equipment/device.
  • Page 31 APPENDIX Wiring protection Provide the appropriate UL and cUL listed class T type fuse that are suitable for branch circuit protection in accordance with the table below FR-A741- 018.5 Rated voltage [V] 480V or more Fuse maximum allowable rating [A] * * Maximum allowable rating by US National Electrical Code.
  • Page 32 APPENDIX A.2 Instructions for UL and cUL (Standard to comply with: UL 508C, CSA C22.2 No.14) A.2.1 General precaution The bus capacitor discharge time is 10 minutes. Before starting wiring or inspection, switch power off, wait for more than 10 minutes, and check for residual voltage between terminal P/+ and N/− with a meter etc., to avoid a hazard of electrical shock.
  • Page 33 APPENDIX A.2.5 Motor overload protection When using the electronic thermal relay as motor overload protection, set the rated motor current to Pr. 9 Electronic thermal O/L relay. Electronic thermal relay function characteristic This function detects the overload (overheat) of the Pr.
  • Page 34 APPENDIX...
  • Page 36 Phone: +370 (0)5 / 232 3101 Fax: +370 (0)5 / 232 2980 MITSUBISHI ELECTRIC Mitsubishi Electric Europe B.V. /// FA - European Business Group /// Gothaer Straße 8 /// D-40880 Ratingen /// Germany Tel.: +49(0)2102-4860 /// Fax: +49(0)2102-4861120 /// info@mitsubishi-automation.com /// www.mitsubishi-automation.com FACTORY AUTOMATION...

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