General Precautions. Allen-Bradley powerflex 700

General Precautions

Preface

ATTENTION:

This drive contains ESD (Electrostatic Discharge) sensitive parts and assemblies. Static control precautions are required when installing, testing, servicing or repairing this assembly. Component damage can result if ESD control procedures are not followed. If you are not familiar with static control procedures, reference A-B publication 8000-4.5.2, “Guarding Against

Electrostatic Damage” or any other applicable ESD protection handbook.

ATTENTION:

An incorrectly applied or installed drive can result in component damage or a reduction in product life. Wiring or application errors, such as, undersizing the motor, incorrect or inadequate AC supply, or excessive ambient temperatures can result in malfunction of the system.

ATTENTION:

Only qualified personnel familiar with adjustable frequency AC drives and associated machinery should plan or implement the installation, start-up and subsequent maintenance of the system. Failure to comply can result in personal injury and/or equipment damage.

ATTENTION:

To avoid an electric shock hazard, verify that the voltage on the bus capacitors has discharged before performing any work on the drive.

Measure the DC bus voltage at the +DC & –DC terminals of the Power Terminal

Block (refer to the Installation Instructions for location). The voltage must be zero.

ATTENTION:

Risk of injury or equipment damage exists. DPI or SCANport host products must not be directly connected together via 1202 cables.

Unpredictable behavior can result if two or more devices are connected in this manner.

ATTENTION:

An incorrectly applied or installed bypass system can result in component damage or reduction in product life. The most common causes are:

•

Wiring AC line to drive output or control terminals.

•

Improper bypass or output circuits not approved by Allen-Bradley.

•

Output circuits which do not connect directly to the motor.

Contact Allen-Bradley for assistance with application or wiring.

ATTENTION:

Loss of control in suspended load applications can cause personal injury and/or equipment damage. Loads must always be controlled by the drive or a mechanical brake. Parameters 600-611 are designed for lifting/torque proving applications. It is the responsibility of the engineer and/or end user to configure drive parameters, test any lifting functionality and meet safety requirements in accordance with all applicable codes and standards.

Rockwell Automation Publication 20B-UM002G-EN-P - July 2014

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Preface

ATTENTION:

The “adjust freq” portion of the bus regulator function is extremely useful for preventing nuisance overvoltage faults resulting from aggressive decelerations, overhauling loads, and eccentric loads. It forces the output frequency to be greater than commanded frequency while the drive's bus voltage is increasing towards levels that would otherwise cause a fault.

However, it can also cause either of the following two conditions to occur.

•

Fast positive changes in input voltage (more than a 10% increase within 6 minutes) can cause uncommanded positive speed changes. However an

“OverSpeed Limit” fault (F25) will occur if the speed reaches [Maximum Speed]

+ [Overspeed Limit], (parameters 82 and 83). If this condition is unacceptable, action should be taken to 1) limit supply voltages within the specification of the drive and, 2) limit fast positive input voltage changes to less than 10%.

Without taking such actions, if this operation is unacceptable, the “adjust freq” portion of the bus regulator function must be disabled (see parameters 161 and 162).

•

Actual deceleration times can be longer than commanded deceleration times.

However, a “Decel Inhibit” fault (F24) is generated if the drive stops decelerating altogether. If this condition is unacceptable, the “adjust freq” portion of the bus regulator must be disabled (see parameters 161 and 162). In addition, installing a properly sized dynamic brake resistor will provide equal or better performance in most cases.

These faults are not instantaneous. Test results have shown that they can take between 2…12 seconds to occur.

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Rockwell Automation Publication 20B-UM002G-EN-P - July 2014