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Appendix
Glossary
This glossary defines terms pertaining to Allen–Bradley Absolute
Encoder Modules. For abroader glossary of programmable controller
words, refer to our Programmable Controller Terms (publication no.
PCGI–7.2).
ABSOLUTE ENCODER:
An encoder with a unique digital output code for each increment of shaft
rotation
BIDIRECTIONAL BLOCK TRANSFER:
The performance of alternating read and write operations between an
intelligent I/O module and the processor data table
DIFFERENTIAL OUTPUT ENCODER:
An encoder using differential line driver output devices that have a bit x
and bit x output signals
ENCODER DATA SETTLING TIME:
The time required for encoder data to settle to reflect a new position
GRAY CODE:
A binary numbering system modified so that only 1 bit changes as the
counting number increases.
MAXIMUM ENCODER SHAFT SPEED:
The maximum speed at which the encoder shaft can turn to give a
one–count resolution while controlling a particular number of outputs.
NEW POSITION THROUGHPUT TIME:
The time between a certain state being applied to the input terminals and
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