Rockwell Automation 7000L PowerFlex 7000 Medium Voltage AC Drive C Frame - Marine - Manual (Page 283)

Component Definition and Maintenance 4-107
7000 ―C‖ Frame - Marine 7000L-UM302B-EN-P – June 2013
Positional Encoder Operations 
Besides quadrature encoders, the Universal Encoder Interface will
also accept positional (absolute) encoders. Parallel positional data is
converted to a serial stream and transmitted to the DPM when
requested by the drive. The board will also generate ―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 will
invert the incoming gray code data and then convert it to binary
for transmission to the DPM.
2. Natural Binary, Low True. No conversion is done on the
incoming data but it is inverted.
3. Gray code, High True. In this configuration, the incoming gray
code data is simply converted to binary. No inversion is done on
the input data.
4. Natural Binary, High True. The positional data is simply
converted to the serial stream. No inversion or conversion is
done on the data.
 Consult factory for availability of Positional Encoders.