Allen-Bradley PowerFlex 755 Reference Manual

CIP Axis Attributes
Chapter 4
Rockwell Automation Publication MOTION-RM003I-EN-P - February 2018 223
The Velocity Negative Feedforward Gain attribute is a value that reduces or
eliminates velocity overshoot by subtracting a portion of the velocity reference
signal from the velocity error.
Velocity Droop
Usage Access T Data
Type
Default Min Max Semantics of Values
Optional - FPV Set/SSV REAL 0 0
Velocity Units / Sec / %
Rated
Velocity Droop value that provides compliance to the velocity integrator by
subtracting a portion of the velocity loop effort from the velocity error input to
the velocity integrator. The presence of the Torque/Force scaling gain, Kj, in the
droop signal path lets Velocity Droop to be specified in velocity units per % rated
torque output. This parameter is also valid for V/Hz devices and its behavior is
nearly identical, but instead of % rated being related to torque, % rated is related to
current.
Velocity Error Tolerance
Usage Access T Data
Type
Default Min Max Semantics of Values
Optional - PV Set/SSV REAL 0
FD
0
Velocity Units
The Velocity Error Tolerance attribute determines the absolute maximum
Velocity Error value that can be tolerated without causing a Excessive Velocity
Error exception.
Velocity Error Tolerance Time
Usage Access T Data
Type
Default Min Max Semantics of Values
Optional - PV Set/SSV REAL 0.01 0
Seconds
The Velocity Error Tolerance Time attribute determines the maximum amount of
time that the Velocity Error Tolerance can be exceeded without generating an
exception.

Allen-Bradley PowerFlex 755 Specifications

General

Category	AC Drive
Amperage	2.2…1470 A
Output Voltage	0 to Input Voltage
Output Current	2.2…1470 A
Enclosure	IP20, IP30, IP54
Communications	EtherNet/IP, ControlNet, DeviceNet
I/O	Digital, Analog, Encoder, Relay
Safety	Safe Speed Monitor
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overload, Short Circuit, Ground Fault, Overtemperature
Operating Temperature	-10°C to 50°C (14°F to 122°F)
Storage Temperature	-40°C to 70°C (-40°F to 158°F)
Humidity	5…95% noncondensing
Altitude	Up to 1000m (3300ft) without derating
Voltage	200-240V AC, 380-480V AC, 500-600V AC, 690V AC
Input Voltage	200-240V AC, 380-480V AC, 500-600V AC, 690V AC
Control Method	Sensorless Vector