Rockwell Automation Publication 22-TD001I-EN-P - June 2013 5
PowerFlex 4 and 40 AC Drives
Performance
• Sensorless Vector Control develops high torque over a wide speed range
and adapts to individual motor characteristics.
•Variable PWM allows the drive to output more current at low
frequencies.
• Integral PID functionality enhances application flexibility.
• Timer, Counter, Basic Logic and StepLogic™ functions can reduce
hardware design costs and simplify control schemes.
–Timer function: Relay or opto outputs controlled by drive
performing timer function. Timer is initiated by activating a digital
input programmed as “Timer Start.”
–Counter function: Relay or opto outputs controlled by drive
performing counter function. Counter function is activated by a
digital input programmed as “Counter Input.”
–Basic Logic: Relay or opto outputs controlled by status of digital
inputs programmed as “Logic Inputs.” Performs basic Boolean logic.
–StepLogic: Logic-based steps using preset speed settings. Each step
can be programmed for a specific speed, direction and accel/decel
profile. Drive outputs can be used to indicate which step is being performed.
I/O
• Two (2) Analog Inputs (one unipolar and one bipolar) are
independently isolated from the rest of the drive I/O. These inputs
can be toggled between via a digital input.
• Three (3) fixed and four (4) fully programmable Digital Inputs
provide application versatility.
• One (1) Analog Output is DIP switch selectable for either
0…10V or 0…20mA. This scalable, 10-bit output is suitable for
metering or as a speed reference for another drive.
• Two (2) Opto Outputs and one (1) form C relay output can be
used to indicate various drive, motor or logic conditions.
Communications
• Integral communication cards such as DeviceNet™, EtherNet/IP™,
PROFIBUS™ DP, LonWorks® and, ControlNet™ can improve machine
performance.
• The DSI Wireless Interface Module (WIM) provides a wireless
communication interface between a Pocket PC, laptop computer or
desktop computer equipped with Bluetooth® wireless technology, and any
Allen-Bradley® product supporting the DSI™ protocol.
• Field installed option allows for future addition of stand-alone drives to a
network.
• Online EDS file creation with RS NetWorx™ providing ease of set-up on a
network.
14
16
Common
+
13
14
-/+ 10V
Common
Analog Signal Follwer
Drive 1
Analog Out
Drive 2
Analog In
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