Rockwell Automation 9000 DeviceNet 9000 - Manual (Page 6)

6
Table 2. Configuration Parameters
Parameter Type Options Default
Operate Mode R,W Light or dark operate Light operate
Sensor Output R Bit 0: 0=output OFF, 1=output ON
Diagnostic R Bit 1: 0=OK, 1=alarm
Communication Rate R,W 125, 150, 300kB 125kb
Node Address R,W 0 to 63 63
Diagnostic Operation
The Series 9000 DeviceNet sensors provide a diagnostic output bit to indicate an
unstable sensing condition. This condition can be caused by a “dirty or contaminated”
lens or by sensor misalignment. Strobing models of the sensor will output immediately
upon detection of a margin value between 1 and 2.5. This method, called static
diagnostic, is ideal for web sensing applications where an immediate indication is
required. The diagnostic bit of COS models will not output until a complete “low margin”
transition occurs. Called dynamic diagnostics, this method is best suited for
applications where targets are constantly moving into and out of the sensor field of
view, i.e., conveyor application.
Data Byte 1
Bit 0 Bit 1
Output Diagnostic
0 OFF OK
1 ON ALARM
Transmitted Beam Mode
Visually align the emitter and receiver units (emitter and receiver fibers) until the Output
LED on the top of the control lights up (with Light Operate mode) or goes out (with Dark
Operate mode).
To be certain that the beam is centered, it is required to sweep the emitter or receiver in
the horizontal and vertical plane and determine at what position the output indicator
goes on and then goes off. Set the sensor (or fiber optics) halfway between both
positions. The Margin LED should also be on when the beam is unbroken.
Retroreflective/Polarized Retroreflective Mode
Visually align the sensor (or fiber optic cable) on the reflector until the Output LED on
the top of the control lights up (with Light Operate mode) or goes out (with Dark
Operate mode). Also verify that the Margin LED is on.
To be certain that the beam is centered, it is required to sweep the sensor in the
horizontal and vertical plane and determine at what position the output indicator goes
on and then goes off. Set the sensor (or fiber optics) halfway between both positions.
Break the beam with the object to be detected and check if the output indicator turns
on. When this does not happen turn down the sensitivity adjustment until it does.
Restore the light beam by removing the object and check if the output indicator turns off
again and that the Margin LED comes on. If this does not happen, increase the size of
the reflector or decrease the distance between the reflector and the sensor.
Diffuse Mode
Visually align the sensor (or fiber optic cable) on the object until the Output LED on the
top of the control lights up (with Light Operate mode) or goes out (Dark Operate mode).
To be certain that the beam is centered, it is required to sweep the sensor in the
horizontal and vertical plane and determine at what position the output indicator goes
on and then goes off. Set the sensor (or fiber optics) halfway between both positions.
Remove the object in front of the sensor and eliminate any background signals by
turning down the sensitivity adjustment, if such background signals exist. Replace the
object and verify that the output LED goes on and that the Margin LED is on.
Publication 75025--381--01(A)
May 2001
Printed in USA
PHOTOSWITCH R is a registered trademark of Rockwell Automation/Allen-Bradley.