Rockwell Automation 42JT VisiSight Photoelectric Polarized Retroreflective Sensors - Manual (Page 2)

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Mounting the Sensor
Securely mount the sensor on a firm, stable surface or support. An
application which is subject to excessive vibration or shifting may
cause intermittent operation. For installation convenience,
Rockwell Automation offers a wide range of mounting brackets
(see the Accessories section for more details).
Alignment Indication
For short range applications the visible light beam of the sensor
suffices as alignment aid.
The alignment feature may be used for longer range applications.
Alignment of the sensor is indicated via change in intensity of the
green LED in the Alignment Mode, as follows:
1. Press and release the push button twice within three seconds.
After three seconds, the green LED turns OFF for 0.5 second
indicating the sensor is in the alignment mode.
2. Align the sensor to the reflector. The intensity of green LED
increases with better alignment. Secure it in a position that
yields the highest intensity of the green LED. Press and release
the button once to return to the RUN mode—or the sensor
returns to the RUN mode automatically in two minutes.
VisiSight™ Configuration
The 42JT VisiSight is configured using the push button Remote
Teach or via IO-Link and the LED indicators on the sensor. There
are five features that can be configured:
• Static Teach: Standard sensitivity/sensing range adjustment
• Dynamic Teach (running process)
• Light operate (L.O.) or dark operate (D.O.) output
• Auto PNP/NPN, dedicated NPN or dedicated PNP
• Push button lock/unlock
The sensor output is disabled during Teach.
Teach Sensitivity/Sensing Range
The default setting is the maximum sensitivity/range.
Static Teach
Teaching the sensitivity/sensing range is a two step process: teach
the reflector (first condition) and teach “target” (second
condition).
Standard Teach
1. To teach the reflector (first condition):
Align the sensor to the reflector. Press and hold button for three
seconds until the yellow LED starts flashing. Release the button.
The first condition has now been taught.
t > 3 s
Reflector
2. Teach “target” (second condition):
Restore to factory default setting of maximum range: Perform
steps 1 and 2 with “no target” in the sensor’s field of view and no
reflector.
Dynamic Teach (Running Process):
If the targets to be detected are moving with the sensor aimed at
the running process, press and hold the button for three seconds
until the yellow LED starts flashing. The sensitivity will
automatically be taught in the next 30 seconds provided the
sensor sees two cycles of “target” and “no target.”
Teach Light Operate (L.O.) or Dark Operate (D.O.)
The default setting of the output is dark operate (D.O.)
D.O. setting means that output turns ON when the target is
detected. If the application requires the output to turn OFF when
the target is detected, the setting may be changed to light
operate (L.O.).
1. To access the teach output mode setting:
2. To change the sensor output mode setting:
Output Type Selection:
Auto PNP/NPN, Dedicated NPN, Dedicated PNP)
The default setting is Auto PNP/NPN. This means the sensor
monitors the load connection and automatically configures for
the proper operation, i.e., PNP or NPN. If no load is connected, the
sensor defaults to PNP.
Insert the target between the sensor and the reflector. Press and
release the button. The teach process is complete.
If the push button is not pressed within 30 seconds, the sensor
exits teach mode and returns to RUN mode without learning
new setting.
Press and hold button for six seconds until green LED starts
flashing. Release the button. The current setting is indicated by
the yellow LED:
L.O.: Yellow LED ON
D.O.: Yellow LED OFF
Press and release the button within ten seconds to toggle from
L.O. to D.O., the selection indicated by the yellow LED.
The sensor retains the setting per the last button depression and
returns to the RUN mode ten seconds after the last button is
depressed.
t < 0.5 s
Reflector
Target
t > 6 s
t < 0.5 s