Emerson Unidrive M700 User Manual
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Emerson Unidrive M700 User Manual

Low voltage dc operation in elevator applications/frame sizes 3 to 10
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User Guide
Low voltage DC
operation in
Elevator Applications
Unidrive M700
Frame sizes 3 to 10
Issue: 1

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Summary of Contents for Emerson Unidrive M700

  • Page 1 User Guide Low voltage DC operation in Elevator Applications Unidrive M700 Frame sizes 3 to 10 Issue: 1...
  • Page 2 This may also apply to drives returned from an Emerson Industrial Automation Service Centre or Repair Centre. If there is any doubt please contact the supplier of the product.

  • Page 3: Table Of Contents

    This User Guide provides information for installing and operating the drive in Low voltage DC mode. The information is in logical order for designing, configuration set up and operation. Chapter 1 Safety information contains general safety information it is essential that the warnings are observed and the information considered when designing and working with a system.

  • Page 4: Safety Information

    Safety Information Warnings, Cautions and Notes Electrical Safety – General warning The voltages used in the drive can cause severe electrical shock and/or burns, and could be lethal. Extreme care is necessary at all times when working with or adjacent to the drive. Specific warnings are given at the relevant places in this User Guide.

  • Page 5: Motor

    Particular attention must be given to the cross-sectional areas of conductors, the selection of fuses or other protection, and protective ground (PE) connections. The Elevator drive User Guide contains instruction for achieving compliance with specific EMC standards. Within the European Union, all machinery in which this product is used must comply with the following directives: •...

  • Page 6: Introduction

    Introduction Before reading this document it is assumed that the user is familiar with the drives documentation. This User Guide details configuration and operation of the drive with a Low voltage DC supply in an Elevator system. Modes of operation There are three basic configurations of operation supported on the drive for either the AC supply or the Low voltage DC supply as detailed following.

  • Page 7: Power Supplies

    Power supplies For Low voltage DC operation an external DC supply is required which could be in the form of a UPS or external batteries. The length of time that the drives and system will be able to operate and run the motor will be dependent upon the Elevator system supply requirements along with the battery capacity.

  • Page 8: External Components

    The external user 24 Vdc supply is also required for drive frame sizes 6 and larger for the Power Stage dependent upon the final DC Bus voltage level. If the DC Bus is below the AC supply loss level this is required. For drive frame sizes 9 and larger the external user 24 Vdc supply is also required for the heatsink cooling fans dependent upon the final DC Bus voltage level.

  • Page 9: Low Voltage Dc Operation

    For operation with a UPS the external contactors are managed by the Elevator controller to connect and disconnect both the AC supply and UPS supply, both of these being synchronized. The AC supply and UPS supply inrush current is managed through the drives half controlled rectifier. 2.3.3 Contactor control The contactor control for the transition from the AC supply to Low voltage DC supply can be managed...
  • Page 10 During a transitioning from the UPS supply to the AC supply the drive must be in the Under Voltage state where the soft start circuit is active to limit the AC inrush current. Connecting the UPS supply where the DC Bus is discharged will use the drives internal soft start circuit.

  • Page 11: Low Voltage Dc Operation

    Low Voltage DC Operation Following is an example of a drive system electrical panel with an AC supply for normal operation. The AC supply in this system could be for example a 200 V, or 400 V supply and is used to supply all components within the electrical panel including the drive and Elevator controller, Motor contactors and brake along with Elevator car and associated controls such as door controller, lighting etc...
  • Page 12 AC supply ratings Pr 06.065 – Drive Supply loss AC supply voltage rating Standard Under model level Voltage Threshold 200 Vac 200 to 240 + 10 % 400 Vac 380 to 480 + 10 % 575 Vac 500 to 575 + 10 % 690 Vac 500 to 690 + 10 % The AC supply in the example above will be rated to deliver full power to the complete Elevator...

  • Page 13: Low Voltage Dc Mode

    AC Supply Under Voltage Timing NOTE: Power down save is carried out when the DC Bus voltage passes Pr 06.065 - Standard Under Voltage Threshold in either direction. NOTE: If the external 24Vdc is permanently connected to the drive and powering the control stage there will be no power down save carried out, any parameter save must be carried out prior to power down with parameter mm.xxx = 1001 Low Voltage DC Mode...
  • Page 14 Pr 06.072 - User Supply Select (external user 24 Vdc supply) Off (0) Pr 06.068 - Low Voltage DC Supply Mode Enable Off (0) Pr 06.067 - Low Under Voltage Threshold Select On (1) Elevator system with Low voltage DC supply Elevator system Electrical panel (Drive + Controller + Auxiliary devices) Braking resistor...
  • Page 15 This situation could occur for example during a power supply brownout. • Minimum Under voltage threshold for a 400 V drive is 330 Vdc • Maximum allowed supply voltage for a 400 V drive is 480 + 10 % • Peak of the maximum allowed supply voltage = 480 x 1.1 x √2 = 747 Vdc •...

  • Page 16: Ac Supply Mode With Seem-Less Transition To Low Voltage Dc Mode + Contactor Control

    Low Voltage DC Supply Under Voltage Timing NOTE: For drive frame sizes 7 and larger when operating with a single phase UPS the power supply should be connected to L1 and L2. Input L3 should be connected directly to L2 to avoid a supply loss fault, and to allow the half controlled rectifier to start up and limit the inrush current for operation with the single phase UPS.
  • Page 17 Any drive can be configured for Low voltage DC operation however there are differences in the electrical connections and operating voltage range depending on the drive frame size. When set up for Low voltage DC operation the drive can deliver rated torque to the motor up to the speed which can be supported from the Low voltage DC supply.
  • Page 18 3.3.1 Drive frame sizes 3 to 6 operation The various items that make up final drive enable can be seen in Pr 06.010 - Enable Conditions. Looking at the different operating states for Low voltage DC operation as shown above for drive frame sizes 6 and smaller: 1.
  • Page 19 b. If the drive is enabled then the internal charge system is inactive so that the drive can run from the Low voltage DC supply. In this case the AC contactor will be opened so that it is not possible for the AC supply to charge the DC Bus. 3.

  • Page 20: External User 24 Vdc For Low Voltage Dc Mode

    NOTE: For drive frame sizes 7 and larger the external contactor which is used to support the soft start charging system for Low voltage DC mode is located in the DC supply connections. Initial charging from the Under Voltage state is limited by the inrush resistor and then as the DC Bus exceeds Pr 06.066 - Low Under Voltage Threshold the external DC contactor will be closed using the output from Pr 06.069 - Under Voltage System Contact Output.

  • Page 21: Running The Motor

    NOTE: If the external 24Vdc is permanently connected to the drive and powering the control stage there will be no power down save carried out, any parameter save must be carried out prior to power down with parameter mm.xxx = 1001 NOTE: During operation in Low voltage DC mode where the Low under voltage threshold is selected there is no power down parameter save carried out, any parameter save must be carried out prior to power...
  • Page 22 Where the Low voltage DC supply is in the form of a battery / UPS the length of time that the drive and system will be able to operate and run the motor will be dependent upon the drive systems power supply requirements along with the battery capacity.

  • Page 23: Parameter Section

    Parameter section For Low voltage DC mode there are a number of parameters within the drive which support configuration of the drive, these include settings for the Low voltage DC supply, UPS and Brake control. The following section details the user parameters within the drive which are used for configuration of the Low voltage DC mode.
  • Page 24 Pr 06.067 - Low Under Voltage Threshold Select = Off (0), the power supply used is determined as follows for drive frame sizes 3 to 6. When the drive first powers up it attempts to use the AC supply or the external user 24 Vdc supply in turn until the drive fully powers up, beginning with the AC supply.
  • Page 25 Pr 06.065 Pr 06.066 - Low Minimum Standard Maximum Over voltage Drive model Under Voltage Under Voltage Threshold Threshold 200 Vac * 24 to 175 400 Vac * 24 to 330 575 Vac * 24 to 435 690 Vac * 24 to 435 1190 * For Low voltage DC operation Pr 06.066 - Low Under Voltage Threshold is setup based upon the external Low voltage DC power supply being used.
  • Page 26 required at the next power up before the drive control system is active. The values will be retained when they are changed up to 128 times, if any more changes are made between power up and power down the new values are not retained. AC Supply Control If Pr 06.068 - Low Voltage Supply Mode Enable = On (1) or Pr 06.067 - Low Under Voltage Threshold Select where Pr 06.066 - Low Under Voltage Threshold is being used the internal drive power...
  • Page 27 Voltage level 200 V 400 V 575 V 690 V VM_STD_UNDER_VOLTS [MIN] Drives frame sizes 7 and larger Drive frame sizes 7 and larger use a DC Bus charge system based on a half controlled thyristor input bridge, the charge system is activated based on the level of the voltage at the AC supply terminals of the drive.
  • Page 28 Low voltage mode for drive frame sizes 3 to 6 The following state diagram shows Pr 10.016 - Under Voltage, the control signal to the external contactor Pr 06.069 Under Voltage Contactor Output and Pr 06.044 - Active Supply. When Pr 06.068 - Low Voltage Supply Mode Enable = On (1) a maximum is applied to Pr 06.066 - Low Under Voltage Threshold to prevent this from being increased above Pr 06.065 - Standard Under Voltage Threshold / 1.1 so that the 5 % hysteresis band on the Pr 06.066 - Low Under Voltage...
  • Page 29 If Pr 05.005 - DC Bus Voltage is above Pr 06.066 - Low Under Voltage Threshold , but below Pr 06.065 - Standard Under Voltage Threshold, there are two possible states depending on whether the Final drive enable is Off (0) or On (1). If the Final drive enable = Off (0) then Pr 10.016 - Under Voltage = On (1), the internal charge system is active and Pr 06.070 Under Voltage System Contactor Closed = On (1), so that the DC Bus can be charged by the AC supply.
  • Page 30 Drive frame sizes 3 to 6 under voltage timing, Pr 06.068 - Low Voltage Supply Mode Enable = On (1) Low voltage mode drive frame size 7 and larger, Pr 06.068 - Low Voltage Supply Mode Enable = On (1) Low voltage mode is intended to provide a smooth transition, without disabling the drive, from the AC supply to the Low voltage DC supply and vice versa.
  • Page 31 Low voltage mode states for drive frame size 7 and larger The low voltage supply system contactor is used to provide the charge system for the Low voltage DC supply. The charge system for the AC supply is provided by the half controlled thyristor input bridge within the drive.
  • Page 32 Drive frame size 7 and larger under voltage timing with Pr 06.068 - Low Voltage Supply Mode Enable = On (1) Parameter Pr 06.068 - Low Voltage Supply Mode Enable Short description Set to 1 to enable the backup supply mode Minimum Off (0) Maximum...
  • Page 33 Parameter Pr 06.067 Low Under Voltage Threshold Select Short description Set to On (1) to enable the low under voltage threshold in parameter O14 Minimum Off (0) Maximum On (1) Default Off (0) Units Off (0) or On (1) Type 1 Bit User Save Update Rate Background read...
  • Page 34 Parameter Pr 06.069 Under Voltage Contactor Close Output Short description Low voltage DC supply control output Minimum Off (0) Maximum On (1) Default Off (0) Units Off (0) or On (1) Type 1 Bit Volatile Update Rate 4ms write Display Format Standard Decimal Places Coding...
  • Page 35 Under voltage system and AC supply control Parameter Pr 06.071 Slow Rectifier Charge Rate Enable Short description Enable to reduce the charge rate of the DC Bus and limit charging current Minimum Off (0) Maximum On (1) Default Off (0) Units Off (0) or On (1) Type...
  • Page 36 Pr 06.073 Braking IGBT Lower Threshold Parameter Pr 06.074 Braking IGBT Upper Threshold Short description Defines the lowest level of the DC Bus voltage where the braking IGBT becomes active Minimum −VM_DC_VOLTAGE_SET Maximum VM_DC_VOLTAGE_SET Default See exceptions below Units Type 16 Bit User Save Update Rate 4ms read...
  • Page 37 Parameter Pr 06.075 Low Voltage Braking IGBT Threshold Short description Defines the threshold used for low voltage braking Minimum −VM_DC_VOLTAGE_SET Maximum VM_DC_VOLTAGE_SET Default Units Type 16 Bit User Save Update Rate 4ms read Display Format Standard Decimal Places Coding RW, VM As default if Pr 06.076 - Low Voltage Braking IGBT Threshold Select = Off (0) the standard braking voltage thresholds are used in both parameter Pr 06.073 - Braking IGBT Lower Threshold and Pr 06.074 - Braking IGBT Upper Threshold.

  • Page 38: Electrical Installation

    In this case, consult Emerson Industrial Automation or their authorized distributor. Equipment supplied by plug and socket Special attention must be given if the drive is installed in equipment which is connected to the AC supply by a plug and socket.

  • Page 39: Power Connections

    Power Connections Drive frame size 3 power connections Internal DC Bus reactor P a g e | 39...
  • Page 40 Drive frame size 4 power connections Internal DC Bus reactor P a g e | 40...
  • Page 41 Drive frame size 5 power connections Internal DC Bus reactor P a g e | 41...
  • Page 42 Drive frame size 6 power connections Internal DC Bus reactor P a g e | 42...
  • Page 43 Drive frame size 7 and 8 power connections Drive frame 7 Internal DC Bus reactor Drive frame 8 Internal AC line reactor For drive frame sizes 7 and larger when operating with a single phase UPS the power supply should be connected to L1 and L2. L3 should be connected directly to L2 to avoid a supply loss fault, and to allow the half controlled rectifier to start up and limit the inrush current with the UPS.
  • Page 44 Drive frame size 9A power connections Internal AC line reactor For drive frame sizes 7 and larger when operating with a single phase UPS the power supply should be connected to L1 and L2. L3 should be connected directly to L2 to avoid a supply loss fault, and to allow the half controlled rectifier to start up and limit the inrush current with the UPS.
  • Page 45 Drive frame size 9E 10E power and control connections External AC line reactor required No direct DC supply connections For drive frame sizes 7 and larger when operating with a single phase UPS the power supply should be connected to L1 and L2. L3 should be connected directly to L2 to avoid a supply loss fault, and to allow the half controlled rectifier to start up and limit the inrush current with the UPS.
  • Page 46 Drive frame size 9D 10D power and control connections External AC line reactor required AC supply via external Rectifier For drive frame sizes 7 and larger when operating with a single phase UPS the power supply should be connected to L1 and L2. L3 should be connected directly to L2 to avoid a supply loss fault, and to allow the half controlled rectifier to start up and limit the inrush current with the UPS.

  • Page 47: Ac Supply Requirements

    AC Supply Requirements Number of phases: Maximum AC supply imbalance: 2 % negative phase sequence (equivalent to 3 % voltage imbalance between phases). Frequency range: 45 to 66 Hz Drive model AC supply voltage rating 200 Vac 200 to 240 + 10 % 400 Vac 380 to 480 + 10 % 575 Vac...
  • Page 48 Drives of low power rating may also be susceptible to disturbance when connected to supplies with a high rated capacity. Line reactors are particularly recommended for use with the following drive models when one of the above factors exists, or when the supply capacity exceeds 175 kVA 03200050, 03200066, 03200080, 03200106, 03400025, 03400031, 03400045, 03400062 Note the current rating of the AC input line reactors should be as follows:...

  • Page 49: External User 24 Vdc Supply Requirements

    at the same time a high current will flow to ground and blow the fuses in the Low voltage DC supply path. • The wiring from the drive to fuses must be protected to a voltage rating equal to or exceeding the rectified AC supply voltage.

  • Page 50: Ground Connections

    The working voltage range of Low voltage DC mode is as follows: External user 24 Vdc supply specification 24 Vdc supply requirements Nominal operating 24.0 Vdc 18.6 Vdc (Frame 6) Minimum operating (Frame 3 to 5 & 7 to 10) 19.2 Vdc 28.0 Vdc (Frame 3 to 6)

  • Page 51: System Design

    System Design Low voltage DC supply The external DC supply for Low voltage DC operation should be selected based upon the power requirements of the drive system. The Low voltage DC supply can be connected directly to the drives DC Bus connections with (a) Blocking diode (b) Fuse protection (c) Soft start circuit (drive frame sizes 7 and larger) and (d) Contactor for isolation and to allow correct transition from the AC supply to the Low voltage DC and vise versa.
  • Page 52 AC, DC supply protection 6.2.1 AC supply fusing (F1, F2, F3) Fuses are always required on AC connections, and must be of IEC class gG or gR, or UL class J, for further detail refer to the Drive User Guide for recommended AC supply fuses. The AC supply fuses detailed in the Drive User Guide are based on the maximum input current to the drive which can be affected by the supply voltage and supply impedance.

  • Page 53: External Soft Start Circuit

    External contactors The drive in Low voltage DC mode uses external contactors for selection of the power supply, these power supplies being the AC supply, Low voltage DC supply, UPS supply and External user 24 Vdc supply. The external contactors are also required to support the drives seem-less external contactor control for safe operation from the AC supply to the Low voltage DC supply, refer to System 3 and System 4 in section 6.5 following for further details and Pr 06.068, Pr 06.069 and Pr 06.070 External contactors...

  • Page 54: Systems Configurations

    For operation with a Low voltage DC supply connected directly to the drives DC Bus an external soft start circuit is required to limit the inrush current. Failure to fit an external soft start circuit may result in permanent damage to the Drive, Low voltage DC supply and circuit. The external soft start circuit required should be selected based upon the external Low voltage DC supply.
  • Page 55 Low voltage mode can be enabled and disabled if required along with connection of the external user 24 Vdc supply by the Elevator controller following transition to the Low voltage DC supply either via the drives digial inputs and comms. Pr 06.044 Active supply Power supply status...
  • Page 56 Low voltage mode can be enabled and disabled if required along with connection of the external user 24 Vdc supply by the Elevator controller following transition to the Low voltage DC supply either via the drives digial inputs and comms.. P a g e | 56...
  • Page 57 Pr 06.044 Active supply Power supply status Standard under voltage threshold Pr 06.065 Pr 06.066 Low under voltage threshold Low under voltage threshold select Low voltage DC operation using Low under Pr 06.067 voltage threshold select Pr 06.073 Braking IGBT lower threshold Brake control voltage setup and low voltage braking select.
  • Page 58 Low voltage mode can be enabled and disabled if required along with connection of the external user 24 Vdc supply by the Elevator controller following transition to the Low voltage DC supply either via the drives digial inputs and comms. Pr 06.044 Active supply Power supply status...
  • Page 59 Low voltage mode can be enabled and disabled if required along with connection of the external user 24 Vdc supply by the Elevator controller following transition to the Low voltage DC supply either via the drives digial inputs and comms.. P a g e | 59...
  • Page 60 Pr 06.044 Active supply Power supply status Pr 06.065 Standard under voltage threshold Pr 06.066 Low under voltage threshold Low under voltage threshold select Low voltage DC operation using Low under Pr 06.067 voltage threshold select Pr 06.073 Braking IGBT lower threshold Brake control voltage setup and low voltage braking select.
  • Page 61 NOTE: For drive frame sizes 7 and larger as shown above, when operating with a single phase UPS the power supply should be connected to L1 and L2. Input L3 should be connected directly to L2 to avoid a supply loss fault, and to allow the half controlled rectifier to start up and limit the inrush current for operation with the single phase UPS.

  • Page 62: Important Considerations

    Parameter Description Notes Active supply Pr 06.044 Power supply status Pr 06.072 User supply select External user 24 Vdc supply Pr 06.065 Standard under voltage threshold Pr 06.066 Low under voltage threshold Low voltage DC operation using Low under Pr 06.067 Low under voltage threshold select voltage threshold select Pr 06.073...

  • Page 63: Diagnostics

    • For Low voltage DC operation with a loss of the AC supply all relays and contactors must be driven from a maintained supply. As the drives DC Bus voltage varies the motor power available varies in proportion to the voltage. •...

  • Page 64: Displaying Trip History

    Displaying trip history The drive stores all drive trips along with date and time stamping information in Menu 10. Trip log Pr 10.020 - Trip 0 through to Pr 10.027 - Trip 9 store the 10 most recent trips that have occurred where Trip 0 (Pr 10.020) is the most recent and Trip 9 (Pr 10.027) is the oldest.
  • Page 65 NOTE: An auto reset will not occur after any trips with priority levels 1, 2 or 3 and if there has been no trip for 5 minutes the internal auto reset counter is cleared, NOTE: When a manual reset is carried out the auto reset counter is reset to zero. Priority Category Trips Comments...
  • Page 66 Option module, NV Media Card and other status indications First row string Second row string Status Booting Parameters Parameters are being loaded Drive parameters are being loaded from a NV Media Card Booting Option Program User program is being loaded User program is being loaded from a NV Media Card to the option module in slot X Writing To NV Card...

  • Page 67: Troubleshooting And Identifying Faults

    Troubleshooting and Identifying Faults The following section provides some guidance for troubleshooting and fault finding within the Low voltage DC system and operation. Reported fault Root cause Recommended actions Under voltage state AC supply loss Power supply has been lost and the drives DC Bus voltage has Low voltage DC dropped below the active under voltage threshold in either supply loss...
  • Page 68 Reported fault Root cause Recommended actions PSU 24 trip on External user 24 Vdc Failure to connect the external user 24 Vdc supply on the Control power up for Low supply loss to Control PCB of drive frame sizes 3 and larger with Pr 06.072 - User Supply voltage DC Select = On (1) or O12 -Low Voltage Supply Mode Enable = On operation...
  • Page 69 Reported fault Root cause Recommended actions Waiting For Power External user 24 Vdc Failure to connect the external user 24 Vdc supply on the Power Systems on power supply loss to Power Stage of drive frame sizes 6 and larger will result in “Waiting For up for Low voltage Stage Power Systems”...

  • Page 70: Index

    Index Limit the speed………………………...…………….22 Low under voltage threshold……………..…...14 Adjusting parameters…………………………….…..5 Low under voltage threshold select………….……15 AC line reactor……………………………………….53 Low voltage braking IGBT threshold………………41 AC supply contactor…………………………………18 Low voltage DC mode……………………..23, 37 AC supply loss……………………...….12, 48, 67, 74 Low voltage supply system contactor……………..36 AC supply mode……………………………………..11 AC supply mode with seem-less transition to Low voltage DC mode + contactor control....16...

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