Omron Vision Sensor FH Series Connection Manual page 30

Precautions for Correct Use
The implementation procedures for robot programs noted in this chapter are a
reference. You should design, implement, and test actually operating robot programs
based on your specific environment and applications.
In the Main Window or "Layout setup" of the Vision Sensor, check that the "Output"
of the current layout is ON. If the setting were OFF, the Vision Sensor will not output
measurement values.
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