Rockwell Automation Publication 871TM-UM002C-EN-P - October 2017
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Review the 1734-4IOL IO-Link Add-on Profile
Chapter 9
Controller Tags
The controller tags have two process data tags that show the status of the sensor
concerning the output and the margin status.
Triggered:
This process bit turns toggles to (1) when the sensor detects the
target and to (0) when the sensor does not detect the target. The sensor
operates as normally open when connected to IO-Link regardless of whether its
normally closed.
Margin Status:
The bit can be used as a low margin warning indicator to
detect the target is beyond the recommended working range of the sensor. This
process bit toggles to High (1) when the sensor detects a target AND the target
is between 0…80% of the operating range of the sensor. The process bit toggles
to Low (0) when the sensor detects a target beyond 80% of the specified
operating range of the sensor.
The recommended working range of the sensor is less than 80% of the specified
or nominal sensing range. Operation within the working range of the sensor
helps sustain stable operation with typical environmental temperature, load,
and supply voltage fluctuations and differences due to the manufacturer
tolerances.