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Rockwell Automation Publication 35-UM001A-EN-P - May 2022
Chapter 1 Armor PowerFlex Variable Frequency Drives Overview
(STO) mode. See
Hardwired Safe Torque Off (STO) Function on page 91
details.
Integrated Safety Functions
When the Armor PowerFlex is applied with a suitable safety programmable
controller, additional functionality is available. This functionality includes
network safety functions such as STO, timed SS1, SBC, and Safety I/O. When
adding a suitable safety encoder to the Armor PowerFlex drive, it can support
additional safe speed monitoring functions, such as SLS, SLP, SDI, and SS1
ramp.
In addition to safety I/O features, the drive supports these functions:
integrated STO, timed SS1, Safe Brake control (SBC), and ramped SS1 when a
safety encoder is used.
See
for details on integrated safety I/O and safety functions.
Standard Encoder
Operation and Diagnostics
The Armor PowerFlex drive has a feedback interface that allows an external
feedback device (encoder) to be connected to the product. An encoder can
provide more accurate velocity control by providing an indication of the actual
speed of the motor/load.
Supported standard encoder types:
•
Digital Incremental, Single Channel, Single Ended
•
Digital Incremental, Single Channel, Differential
•
Digital Incremental, Dual Channel, Single Ended
•
Digital Incremental, Dual Channel, Differential
The encoder signals are connected in parallel for both safety and standard
drive control. Standard control can use single-ended encoder signals, but
differential signals are required for safety functions. The standard and safety
feedback must be configured separately. If the feedback device uses safe speed
monitor functions, additional diagnostics and configuration values must be
considered. See
Safety Feedback Interface (SFX) Instruction Operation on
for more information on the controller-based safety encoder support
Configure Encoder Feedback on page 160
for information
on how to configure the standard and safety encoder.
The Armor PowerFlex can supply either 5V or 12V to the encoder, through the
encoder output. The encoder voltage supply switch, next to the IP address
switches, must be set to the proper supply voltage (5V or 12V) for the connected
encoder. See
Remove Front Logic Cover on page 62
for information on how to
gain access to the encoder voltage supply switch.
SWITCH