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Drives Service & Support > Powerflex 755 > FAQ

What voltage and horse power (HP) ranges will be available in the initial release?

The initial launch will have drives available for both 400/460V AC applications. The power ranges are as follows:

  • 7.5…250 kW at 400V AC & 540V DC input
  • 10…350 Hp at 480V AC & 650V DC input

 

What is the overload capability of the drive?

  • Normal Duty
    • Continuous operation at rated output current
    • 110% Overload for 1 minute every 10 minutes
    • 150% Overload for 3 seconds every 1 minute
  • Heavy Duty
    • Continuous operation at the appropriate rated output current
    • 150% Overload for 1 minute every 10 minutes
    • 180% Overload for 3 seconds every 1 minute

 

Is there a plan for a 200V and 600V Class version of this drive?

Yes, we plan to have a 200V AC and 600/690V AC version of the PowerFlex 755 drive. Release schedules are being defined and will be published in a future update of this document. Please contact the Product manager for additional information.

 

What are some of the new hardware features?

  • Embedded Ethernet
  • Slot based for easy installation of options
  • Real Time Clock with battery backup
  • (1) 24V DC/120V AC configurable Input
  • RoHS Compliant parts
  • Conformal Coated parts

 

What are some of the Standard firmware features?

  • DeviceLogix
  • TorqProve
  • Preventative Diagnostics
  • Selectable Motor Control Algorithms; Vector Control with Force Technology™, Permanent Magnet Sensorless, and V/Hz
  • Selectable Control for Speed, Torque, and Position Control with New PCAM features
  • Assisted Start-up Routine
  • Feedback Loss Switchover (in speed mode)
  • Performance Application Features (Inertia Adaptation, Filters, Inertia Compensation., etc.)
  • Analog Loss Detection
  • Motor Overload Retention
  • Adv. Drive Overload Protection
  • Bus Regulation

 

Where is this drive positioned within the PowerFlex family?

The PowerFlex 755 provides increased system productivity along with basic and enhanced safety options to provide greater functionality across manufacturing systems. Designed for ease of integration, application flexibility, and performance, at initial release the PowerFlex 755 is positioned between the PowerFlex 700 and PowerFlex 700S.

 

What certifications does this drive have?

The PowerFlex 755 drive has CE, EMC EN61800-3, Low Voltage EN61800-5-1, UL, cUL, C-Tick, TUV FS, and SEMI F47 certifications and ROHS compliance for world wide applications support.

 

What enclosure types are available with this drive?

  • IP20, NEMA/UL Type 0 = 0 -50˚ C (32-122˚ F) All Frames, All Ratings
  • IP20, NEMA/UL Type 0 Front/IP66, NEMA UL Type 4X Back/Flange = 0 -40˚ C (32-104˚ F) All Frames, All Ratings
  • IP54, NEMA/UL Type 12 = 0 -40˚ C (32-104˚ F) Frames 2-5

 

What communication interfaces are supported?

EtherNet/IP, ControlNet, DeviceNet, Remote I/O, RS485 DFI, PROFIBUS DP, Interbus, Modbus/TCP, Bluetooth, CANopen, HVAC

 

How many digital inputs and outputs are available?

The I/O count is determined by the number of I/O option cards configured. The PowerFlex 755 can be configured to use as many as 5 I/O options cards. One Option card can have as many as 6 inputs and 3 outputs.

 

What feedback interfaces are available with this drive?

Incremental, EnDat and Hiperface for Stegmann and Heidenhain high resolution feedback, SSI for Stahltronis and Temposonics and BiSS for linear feedback

 

Is this drive supported by drive software tools for startup and configuration?

Yes, the PowerFlex 755 is supported by the following:

  • DriveTools™ SP Software Suite; DriveExecutive™ and DriveObserver™
  • DriveExplorer™ Software
  • RSLogix™ 5000

 

What versions of DriveExplorer and DriveTools SP / DriveExecutive can be used with the PowerFlex 755?

The PowerFlex 755 is supported by v6.01 or higher of DriveExplorer and v5.01 or higher of DriveTools SP / DriveExecutive. Older versions of drive software tools should not be used. Support includes startup wizards for the drive and the Safe Speed Monitor option.

 

What is DeviceLogix and how is it used in this drive?

DeviceLogix is an embedded control technology in some Allen-Bradley products that can control outputs and manage status information onboard a device. In the PowerFlex 755, DeviceLogix is used to provide additional control capability at the drive level based on application needs. A function block based program can be configured to control drive functions and physical and networked I/O.

 

How is DeviceLogix programmed in the PowerFlex 755?

The PowerFlex 755 DeviceLogix is programmed using:

  • v6.01 or higher of DriveExplorer
  • v5.01 or higher of DriveTools SP / DriveExecutive
  • v2.01 or higher of RSLogix 5000 Drive AOPs

The DeviceLogix editor in RSNetWorx for DeviceNet can not be used.

 

Is DeviceLogix network dependant in the PowerFlex 755?

No, DeviceLogix is not network dependant with the PowerFlex 755.

 

Is there a RSLogix 5000 Add-On Profile (AOP) available for the PowerFlex 755?

Yes, it is available in the v2.01 release of Drive AOPs and it can be downloaded at: http://www.ab.com/support/abdrives/webupdate/software.html

 

What control options are available with this drive?

  • I/O; 24V DC Option, 115V AC Option
  • Feedback; Incremental Encoder Option, Dual Incremental Encoder Option, Universal Feedback Option which includes support for Incremental, EnDat and Hiperface for Stegmann and Heidenhain high resolution feedbacks, SSI for Stahltronis and Temposonics and BiSS for linear feedback
  • Safety; Safe Torque Off Option, Safe Speed Monitor Option
  • Communication; 750-Series DeviceNet, Legacy 20-Comm modules are supported with the Communication Carrier option
  • 24V Aux Power Supply Option and New Human Interface Modules (HIM)

 

Are control options factory installed?

No, the PowerFlex 755 base drive can be ordered with option kits separately. Base drive configurable options includes the drive rating, enclosure type, DC terminals, internal brake resistor and braking transistor.

 

What are benefits of the Safe Speed Monitor option?

The Safe Speed Monitor Safety option combines Safe Torque-Off capability and embedded Safety relay with the Rockwell Automation Safe-Speed Control core technology in one hardware option that is embedded in the drive. This option helps save space, reduces system wiring and complexity by allowing input devices to be connected directly to the PowerFlex 755, and is certified at PLe/SIL3.

 

What is Rockwell Automation’s Safe-Speed Control core technology?

Rockwell Automation’s Safe-Speed Control core technology gives the drive the ability to reduce and monitor the speed of a motor driven application to a point that helps allow an operator to safely inspect and perform some process maintenance work without stopping the machine completely. This core technology is embedded in the PowerFlex 755 and MSR57 currently supporting the following functionality:

  • Stop Categories 0, 1 and 2
  • Safe Stop
  • Safe Limited Speed
  • Safe Maximum Speed
  • Safe Maximum Acceleration
  • Safe Direction
  • Door Control and Monitoring
  • Enabling switch input