Baldor MN770 manual Final Installation, Overload = Fault Following Error = on Torque Proving = on

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Final Installation

After the control has been mounted and wired, the final settings can be made.

1.The CALC PRESETS, CMD OFFSET TRIM (if using any analog mode), and CUR LOOP COMP auto tune tests should be performed. Close the armature contactor when doing the CUR LOOP COMP test.

2.The elevator should be operated at inspection speed to set the FEEDBACK DIRECTION and verify the jumper settings on the DC tachometer expansion board (if one is installed). The feedback direction is correct when the motor runs in both directions at a stable speed with an inspection speed command. If the motor attempts to ªrun awayº, change the FEEDBACK DIRECTION parameter in the DC CONTROL block (or reverse the DC Tachometer leads at terminals 1 and 4 of the DC Tachometer expansion board).

3.When the motor can be rotated using automatic control, the field current and voltage should be measured and verified against the motor nameplate rating. Field Forcing, Running and Standing currents can be produced in only the two Hoist modes. Forcing the field is possible using an external input signal.

4.Operate the car at contract speed. Adjust the ACCEL, DECEL and S-CURVE parameter values as required for best ride.

Note: The BIPOLAR HOIST MODE is used in many applications with an external S-curve generator. In this case, Accel, Decel and S-Curve parameters should be set to 0.

5.In the DC CONTROL block, adjust the RATE PROP and RATE INT gains to provide the smoothest ride and best performance for empty car, balanced car and full capacity conditions.

6.When optimum conditions are achieved, set the following LEVEL 2, PROTECTION block parameters:

OVERLOAD = FAULT FOLLOWING ERROR = ON TORQUE PROVING = ON

Be certain to test these settings under empty car and full capacity conditions, and in both directions of travel. It may be necessary to increase the Level 1 OUTPUT block, At Speed Band parameter value to prevent a trip at capacity in the down direction. Torque proving may not be usable with low current motors.

5-2 Set-Up Information

MN770

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Contents MN770 Elevator Application GuideTable of Contents Ii Table of Contents MN770 Modernizations Section General InformationIntroduction Drive DefinitionLimited Warranty Safety Notice Underwriter Laboratory requirements VAC or 460 VAC maximum per control ratingPerform a ªMeggerº test. Failure to disconnect motor from Drive Performance Comparison FeatureSection Technologies Overview20H Control DC SCR Control21H Control Inverter15H Control 22H Control Vector17H & 18H Controls Section Application Considerations Electric Drives Available Operating Modes Common Control FeaturesOperating Mode Metric Measurement System Elevator Motor Horsepower SelectionUS Measurement System Motor Sizing OCW = Dynamic Brake Hardware SelectionCable Preparation Section Hardware InformationGeneral Considerations Encoder RetrofitEncoder Cables Single Ended Connections Encoder Cable ConnectionDifferential Connections Encoder End Control EndBuffered Encoder Output Feedback Section Set-Up InformationDC SCR Controls Field ControlOverload = Fault Following Error = on Torque Proving = on Final InstallationFinal Adjustments Contactor Armature EnableBrake Release Signal Speed CommandInverter Controls Initial Installation and StartupPage TURN-ON Vector Controls Full Load Test Balanced Car TestSeries 18H Control Considerations Final Wiring ConnectionsInitial Set-up ProcedureFinal Set-up Slip Adjustment ValueRated Motor Load Slip Adjustment Value Power Up/Down Sequence for Vector Controls Date Pre-Installation TestsVector Control Worksheet Set-Up Information MN770 Section Troubleshooting Electrical Noise Display Electrical Noise Considerations R-C Snubber Circuit & twisted-pair10HP, 460VAC Drive 30HP, 500VDC Drive, Shielded 10 Isolated Mounting Method Encoder Circuits Wiring PracticesPower Wiring Analog Signal WiresFiber Optics Optical IsolationPlant Ground Optical CouplersLoad Weighing / Torque Feed Forward Appendix aDescription of Operation Table A-1Serial Communications Appendix BAppendix B MN770 Elevator Industry Glossary Appendix CPage Page Appendix C MN770  Baldor Electric Company MN770 97 C&J300 Box

MN770 specifications

The Baldor MN770 is an impressive industrial motor designed for a variety of applications, showcasing robust construction and advanced technology. Known for its reliability and efficiency, the MN770 is manufactured by Baldor Electric Company, a prominent name in the electric motor industry.

One of the main features of the MN770 is its high-efficiency design. This motor adheres to stringent efficiency standards, helping to reduce energy consumption and lower operational costs. It typically meets or exceeds NEMA Premium Efficiency ratings, making it an excellent choice for businesses looking to optimize their energy use.

The MN770 motor is built with a durable cast iron frame, ensuring longevity and resistance to harsh operating conditions. Its weatherproof design is ideal for both indoor and outdoor applications, making it suitable for various environments, including manufacturing plants, water treatment facilities, and agricultural operations.

Another significant characteristic of the MN770 is its versatility. The motor is available in a range of horsepower ratings, allowing users to select the model that best fits their specific needs. Additionally, it offers various mounting configurations and voltage options, further enhancing its adaptability for diverse applications.

The motor utilizes advanced insulation systems and cooling technologies to ensure optimal performance and a longer lifespan. The robust design helps to dissipate heat effectively, enabling the motor to operate efficiently even under heavy loads. This characteristic is essential for applications requiring continuous operation without compromising reliability.

Moreover, the Baldor MN770 incorporates advanced design features such as precision-balanced rotors and high-performance bearings. These characteristics contribute to reduced vibration and noise levels, promoting a quieter working environment and improving overall operation efficiency.

In summary, the Baldor MN770 motor stands out due to its high efficiency, robust construction, versatility, and advanced technologies. Its ability to perform reliably in various industrial applications makes it a popular choice among engineers and facility managers. Investing in the MN770 not only enhances operational efficiency but also supports sustainability efforts by reducing energy consumption in industrial environments.
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