Rockwell Automation 42QA ColorSight Series 9000 Photoelectric Sensors - Manual (Page 14)

14 ColorSight Series 9000 PHOTOSWITCH R Photoelectric Sensor
75027--031--01(A), November 1999
Terms and Definitions
Average Mode
A mode of operation, which takes multiple samples of the target being
sensed. A typical application using this mode would be the color
discrimination of textured materials such as textiles and lumber.
Color Only Mode
A mode of operation found in some color recognition sensors in which the
target color is determined by measuring the hue and chroma attributes
only. This type of mode is ideal when there is a large contrast between the
targets being sensed. An example being, the discrimination of yellow
versus red caps in a bottling application.
Color Plus Intensity
A mode of operation found in some color recognition sensors in which the
target color is determined by measuring the absolute RGB values (hue,
value, chroma). This type of mode is intended for applications where very
high precision levels of color discrimination are required. An example is
the discrimination of close shades of red.
NPN
A solid state output type for low voltage DC sensors with a sinking output.
The load is connected between the (+) power connection and the sensor
output. Low leakage currents, fast response times, and high switching
currents are typical characteristics of this output type.
OFF Delay
A type of time delay which will delay the operation of the output for a set
period of time after the target being sensed is no longer detected. An OFF
time delay is typically used to “stretch” the output signal to provide ample
scanning time for slower PLCs.
PNP
A solid state output type for low voltage DC sensors with a sourcing
output. The load is connected between the sensor output and the (--)
power connection. Low leakage currents, fast response times, and high
switching currents are typical characteristics of this output type.
Single Mode
A mode of operation, which takes only single sample of the target being
sensed. This mode of operation is suited for color discrimination on flat or
untextured surfaces.