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8.
If the required sensor-to-target distance is such that the lightest sample, with the highest signal
level, saturates one or more color channels, it is necessary to reduce the illumination setting.
In the Sensor Settings frame, lower the illumination and press the Send BFS 30M Color
Sensor Settings button.
Repeat this adjustment until the color levels are near 80% as indicated in the Current Reading
frame.
Note that any change in the illumination setting after teaching of one or more Color
Recognition Channels may require re-teaching of these channels for reliable operation.
9.
Once the sensor–to-target distance and illumination level have been established the Color
Recognition channels may be programmed.
10.
Select a channel in the Channel pull-down list.
11.
Select the Recognition Mode, Color & Luminosity or Color Only.
12.
Select the Recognition Enabled check box.
13.
Set the tolerance levels for each color component in text box below each color value.
Generally, a tolerance of 5% to 10% is suitable for color recognition when the target colors
are visually different.
In cases where the colors are very similar, it may be necessary to use lower tolerance settings.
14.
Select the Match output to be high or low.
15.
Place the target in the sensor field of view and press the Teach BFS 30M Color Sensor Channel
button.
The sensor will determine the RGB for the samples and store them for the selected channel.
16.
Repeat this process with each of the samples, selecting a different Color Recognition Channel for
each.
Once all of the samples have been programmed into a channel, place each sample, one at a
time in the sensors field of view and verify that the correct channel indicates a match while
the other channels do not indicate a match.
Input/Output Signal Descriptions
Discrete Outputs
The discrete output(s) are a PNP/NPN configuration allowing the user to provide a load on this output
that is either pulled high to sensor V+ or low to ground. This output is typically connected to a PLC.
The output remains active as long as the target meets the criteria for a color match. In high-speed
applications it may be useful to use the Minimum Output Duration feature to lengthen the signal
duration to meet acquisition requirements of the PLC.
External Trigger
The triggering options include Free Run, Level and Edge. Level and Edge triggering require the use of
the External Trigger input on the sensor I/O connector. Applying a voltage, 12-30VDC, not exceeding
the sensor supply voltage, activates the External Trigger input. When Level is selected, and the External
Trigger input is active, the sensor will continuously check for a color match and update the discrete
outputs until the Trigger input is deactivated. The discrete outputs will remain in the state that they are
in when the Trigger input is deactivated. When Edge is selected, the sensor will check for a color match
on the each rising edge of the External Trigger input and update the discrete outputs. The discrete
outputs will remain in the state that they are in when the Trigger input is deactivated. The External
Trigger input is generally used when a separate proximity sensor detects the presence of a sample and
