P-4 Overview
The PowerFlex 700 catalog numbering scheme is shown on page P-5
.
!
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.
1. 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 will occur if the speed reaches
[Max Speed] + [Overspeed Limit]. 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).
2. 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 and 162). In addition, installing a
properly sized dynamic brake resistor will provide equal or better
performance in most cases.
Important: These faults are not instantaneous. Test results have
shown that they can take between 2-12 seconds to
occur.
!
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.
Catalog Number Explanation
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