Rockwell Automation 42G PHOTOSWITCH Series 9000 On/Off and Timing Photoelectric Sensors - Manual (Page 7)

7
Retroreflective and Polarized Retroreflective Versions
1. Visually align the sensor (or fiber optic cable) on the reflector until the green output LED turns ON (with light-operate
mode) or turns OFF (with dark-operate mode). Also verify that the red margin LED is on.
2. 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) midway
between both positions.
3. Break the beam with the object to be detected and check if the output indicator turns ON (dark-operate mode). If this
does not occur, 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 red margin LED comes ON. If this does not occur, increase
the size of the reflector or decrease the distance between the reflector and the sensor.
Diffuse Mode
1. Visually align the sensor (or fiber optic cable) on the object until the green output LED turns ON (with light-operate
mode) or turns OFF (dark-operate mode).
2. 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) midway
between both positions.
3. 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. If the sensor continues to pick up background reflections it will be necessary to eliminate those
reflections (i.e. paint with a nonreflective color) or to replace the sensor with a background suppression, sharp cutoff
diffuse, or retroreflective sensing mode version.
Configuring the Sensor—42FSP- 9000 Models
Use the information below to align and configure the sensor.
User Interface
Using an instrument screwdriver, open the top cover of the sensor to gain access to the user interface panel. This panel
contains two pushbuttons and three LED status indicators. The left pushbutton is used to put the sensor into teach mode
while the righthand one is for light/dark operate selection.
Teach Mode
The teach mode of the 42GSP--9000 enables the sensor to learn both the light and dark conditions presented to it and to
automatically adjust sensitivity to its optimal level for the application. This mode replaces the adjustment screw of a
conventional photoelectric sensor.
With the sensor pointed at the light condition (target), momentarily press the Teach button until the RED indicator turns
ON. After three seconds, this indicator will flash indicating it is ready to receive the dark condition (background). The RED
indicator will momentarily remain steady, then turn OFF. This indicates that the teach operation was successful.
The 42GSP--9000 photoelectric sensor also contains a two position pushbutton. This button is used to select either light
or dark operate mode of the sensor. In light operate mode, the sensor output will turn ON when light is being reflected
back to it (indicated by the output LED being ON). In dark operate mode, the sensor output will turn ON when no light is
being reflected back to it.
The table below describes the function of the three LED status indicators.
Label Color State Status
OUT Yellow OFF Output de-energized
ON Output energized
SET/SCP Red OFF Normal operation
ON Teach Mode Active present dark condition
Flashing
Teach Mode Active present light condition, Output
SCP active
PWR/STAB Green OFF Sensor not powered
ON Sensor powered
Flashing Unstable margin condition
42GSP—Top View Detail
Teach Button
Light/Dark
Operate Pushbutton
LED Status Indicators
Configuring the Sensor—42GTx Models
In addition to the switch and knob, some versions of the Series 9000 photoelectric sensor contain a four-bank DIP switch
(S1...S4) and two rotary knobs (R2 and R3). These are used to configure internal ON, OFF, and ONE-SHOT time delays
making it possible to provide some degree of local control in an application.
Timing Sensors—Top View Detail
Green Output
Indicator
Yellow Power
Indicator
One Shot/
Time Delay
Red Margin/
SCP Indicator
Sensitivity
Adjustment
Off Delay Adjustment On Delay Adjustment
Short/Long
Off Delay
Short/Long
On Delay
Light/Dark
Operate
S1 S2 S3 S4
Note that these timers are nonretriggerable. The timing can be set for short (0–1.5 sec) or long (0–15 sec) duration using
the DIP switches and adjusted via the two 15-turn rotary knobs. Use the illustration below to aid in configuring these
timers.
IMPORTANT:After initial sensor configuration ensure that the user interface
cover is closed tightly to maintain specified environmental
ratings!
42GRL Models
PWR 9003 DEFAULT
Note that for the 9003 models, the switch must be pushed to the left towards “9003.” For all other models, the switch must
be pushed to the right towards “Default.”