Programmable controller with fiber optic input/output module
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United States of America Patent
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-
May 9, 1989
Grant Date -
N/A
app pub date -
Feb 9, 1987
filing date -
Feb 9, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fiber optic communication system especially adapted for use with a programmable industrial controller includes a machanism for evaluating the quality of the fiber optic link. The system includes a transmitter for sending a different unique character over the fiber optic cable at a plurality of light intensities. A receiver is coupled to the fiber optic cable for receiving the characters from the transmitter. The receiver determines whether information was received at each of the plurality of light intensities by determining which of the unique characters were received. In response to the determination of the light intensities that were received an evaluation of the quality of the fiber optic communication system is made.
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