IB-11B012 INDUSTRIAL INDEXING SYSTEMS, INC.
USER'S GUIDE MOTION CONTROL SYSTEM, MSC-250
A - 4 GLOSSARY AUGUST 1998
Programmable Logic
Controller: An electronic device that scans on/off type inputs and controls
on/off type outputs. The relationship between the inputs and
outputs are programmable by the user.
Quadrature: When relating to a shaft encoder, indicates that there are two
oscillating outputs whose frequencies are 90° out of phase.
Resolver: A type of feedback device which converts mechanical position
into an electrical signal. A resolver is a variable transformer
that divides the impressed AC signal into a sine and cosine
output signal. The phase of these two signals represent the
absolute position of the resolver shaft.