Allen-Bradley PowerFlex 755 Manual
Drives headquarters teamwork & technology, flying start ac drives, for classroom use only
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Also See for PowerFlex 755:
- User manual (270 pages) ,
- Product information (10 pages) ,
- Reference manual (497 pages)
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Table of Contents
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Summary of Contents for Allen-Bradley PowerFlex 755
- Page 1 Flying Start PowerFlex 755 AC Drives For Classroom Use Only!
- Page 2 Important User Information This documentation, whether, illustrative, printed, “online” or electronic (hereinafter “Documentation”) is intended for use only as a learning aid when using Rockwell Automation approved demonstration hardware, software and firmware. The Documentation should only be used as a learning tool by qualified professionals. The variety of uses for the hardware, software and firmware (hereinafter “Products”) described in this Documentation, mandates that those responsible for the application and use of those Products must satisfy themselves that all necessary steps have been taken to ensure that each application and actual use meets all performance and safety requirements, including any applicable...
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Page 3: Table Of Contents
About this lab ....................................4 Tools & Prerequisites ..................................4 Network Setup ....................................5 About the PowerFlex 755 DHQ Demo Box ........................... 6 Drive Setup – Reset Defaults ................................. 7 Drive Setup – Auto Tune and Configuration Parameters ......................8 Connect to the Drive using Connected Components Workbench ..................... -
Page 4: Before You Begin
Please review the following information before starting this lab. About this lab This session provides you with an opportunity to explore the Flying Start features of the PowerFlex 755 AC Drive. In this session you will: Demonstrate a scenario in which Flying Start is not used ... -
Page 5: Network Setup
Network Setup Ethernet Connections PF755 Ethernet Port Set IP Address of PowerFlex 755 to 192.168.1.30 by setting the IP address switches. Hundreds – 0 Tens – 3 Ones – 0 Motor with Flywheel attached 5 of 19... -
Page 6: About The Powerflex 755 Dhq Demo Box
About the PowerFlex 755 DHQ Demo Box 6 of 19... -
Page 7: Drive Setup - Reset Defaults
05 Universal Fdbk 06 Dual Encoder 2. Use the Enter key located in the center of the HIM keypad to select 00 PowerFlex 755. 3. Now, use the left or right arrow keys to navigate to the Memory heading, then select Set Defaults. -
Page 8: Drive Setup - Auto Tune And Configuration Parameters
2. In the Device Toolbox expand Discover, then click Browse Connections in the Device Toolbox to open the Connection Browser. 3. Browse to AB_ETH-1, Ethernet, and select 192.168.1.30, PowerFlex 755. CCW will now connect to the drive, showing its information in the main pane of the software window. -
Page 9: Configuring Drive Parameters
Configuring Drive Parameters 1. Select the Parameters button to view the parameters for the PowerFlex 755 drive. 2. Using the Group drop down list, expand Motor Control and select Motor Data. 3. Fill in the following parameters with the values found on the motor nameplate at this station. - Page 10 5. In the Group drop down menu, expand Drive Cfg and select Preferences. Change the following parameters: 300 – Speed Units – RPM 301 – Access Level - Expert 6. In the Group drop down menu, expand Speed Control, select Speed Reference and change the following parameters: 545 –...
- Page 11 Auto Tune Follow the steps below to Auto Tune the Drive. 1. Using the Group drop down list, expand Motor Control and select Autotune, then change the Autotune value to Rotate Tune. Be sure to press Enter to confirm the Autotune value change. 2.
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Page 12: Flying Start
0 Hz to the motor and then ramp up to the desired frequency. If the motor is already rotating, the drive will try to force the motor to stop, which will generate large currents, which will cause an overcurrent fault. There are two options to be considered when using the Flying Start feature of the PowerFlex 755 series drive. Enhanced ... - Page 13 5. For 162 - DI Fwd Reverse, change the values to the following: Port 7 2 – Input 2 6. Verify this change on the HIM module, by watching the display while flipping the IN 2 switch on the demo box. The HIM will display F, then R, as well as an arrow change when flipping the switch back and forth.
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Page 14: Demo
Demo In this demonstration, you will see what happens if a motor that is able to rotate without power is commanded to start by the drive. 1. Press the Start button on the HIM module of the drive. 2. Allow the motor to get up to its commanded speed, 1400 RPM. This may take a few moments. -
Page 15: Sweep Flying Start - Forward
Sweep Flying Start – Forward The Sweep option for Flying Start utilizes a different method of finding the motor’s speed. Use the steps below to configure the drive for this option, then explore the results of that configuration. 1. In CCW, with the motor still turning, change the Flying Start Mode parameter to Sweep. 2. -
Page 16: Sweep Flying Start - Reverse
Sweep Flying Start – Reverse In some applications, it is possible that the shaft of the motor will be found to be rotating in reverse without power applied. Use the steps below to explore how Sweep Flying Start will address that situation. 1. - Page 17 Changed Ki parameter value In the chart below, we see that the frequency trace has a more gradual slope (encircled in red). The drive will take more time to detect the motor at this Ki value – 1000. Changed Kp parameter values 17 of 19...
- Page 18 In the chart below, we see two sweep procedures, paying close attention to the current trace in blue. Notice that in the procedure on the left, the Kp value is set to 25, which results in a deeper dip in current when the motor has been detected.
- Page 19 Notes Publication CE-DM253-EN-P — Sept 2015 Copyright© 2014 Rockwell Automation, Inc. All rights reserved. 19 of 19...
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