Step 1: Read The Precautions And General Information - Allen-Bradley PowerFlex 70 Installation Instructions Manual

Step 1: Read the Precautions and General Information

Qualified Personnel
ATTENTION: Only qualified personnel familiar with adjustable frequency AC drives and associated machinery can plan or implement the installation, startup,
and subsequent maintenance of the system. Failure to comply can result in personal injury and/or equipment damage.
Personal Safety
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 terminal of the Power Terminal Block and the -DC test point (refer to
Points on page 19
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: The drive start/stop/enable control circuitry includes solid-state components. If hazards due to accidental contact with moving machinery or
unintentional flow of liquid, gas or solids exist, an additional hard-wired stop circuit may be required to remove the AC line to the drive. An auxiliary braking
method may be required.
Product Safety
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: 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 Guarding Against Electrostatic Damage, publication
ATTENTION: Configuring an analog input for 0...20 mA operation and driving it from a voltage source could cause component damage. Verify proper
configuration before applying input signals.
ATTENTION: A contactor or other device that routinely disconnects and reapplies the AC line to the drive to start and stop the motor can cause drive hardware
damage. The drive is designed to use control input signals that start and stop the motor. If an input device is used, operation must not exceed 1 cycle per minute
or drive damage can occur.
ATTENTION: The "adjust freq" portion of the bus regulator function is useful for preventing nuisance overvoltage faults that result 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 can 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 F25
"OverSpeed Limit" fault occurs if the speed reaches P82 [Max Speed] + P83 [Overspeed Limit]. If this condition is unacceptable, take theses actions;
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 [Bus Reg Mode A] and 162 [Bus Reg Mode B]).
• Actual deceleration times can be longer than commanded deceleration times; however, a "Decel Inhibit" fault 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 [Bus Reg Mode A] and 162
[Bus Reg Mode B]). In addition, installing a properly sized dynamic brake resistor provides equal or better performance in most cases.
Note: These faults are not instantaneous and have shown test results that take 2...12 seconds to occur.
for location). The voltage must be zero.
Rockwell Automation Publication 20A-IN009F-EN-P - April 2018
Frame A, B, C, D Power Terminal Block, and DC Bus Test
8000-4.5.2 or any other applicable ESD protection handbook.
PowerFlex 70 Adjustable Frequency AC Drive
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