Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - ForGe Control (PanelView 550) - Manual (Page 137)

Rockwell Automation Publication 7000-UM151E-EN-P - January 2013 137
Component Definition and Maintenance Chapter 3
For the redundant encoder option, remove both the CD_QUAD and
POL_QRDNT jumpers and place them in PARK. With this configuration, the
drive will switch over to the redundant encoder when it detects a problem with
the primary encoder.
When the drive switches over to the redundant encoder, it cannot switch back
without recycling control power.
Positional Encoder Operations
Besides quadrature encoders, the Universal Encoder Interface also accepts
positional (absolute) encoders. The Interface converts parallel positional data to a
serial stream and transmits it to the DPM. The board also generates “pseudo”
quadrature differential signals, including a zero position mark, derived from the
binary data to the DPM.
There are three different positional encoder configurations available. For all of
these configurations remove the ENC_TYPE jumper. The other jumpers
configure the board for the type of positional data (Gray Code or Natural Binary)
set by CD_DQUAD and High or Low True data set by POL_QRDNT.
1. Gray code, Low True. In this configuration the board inverts the incoming
gray code data then converts it to binary for transmission to the DPM.
2. Natural Binary, Low True. The board does not convert incoming data but
does invert it.
3. Gray code, High True. The board converts incoming gray code data to
binary without inverting the input data.
4. Natural Binary, High True. The board converts positional data to the serial
stream without inverting or converting it.
IMPORTANT Consult the factory for availability of dual Quadrature Encoder options.
IMPORTANT Consult the factory for availability of Positional Encoder options.