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52 Rockwell Automation Publication 871FM-UM002A-EN-P - April 2017
Chapter 9 Review the 1734-4IOL IO-Link AOP
Data Mapping Configuration
In this section, the operator is able to configure the process data to be used. The
process data consists of 4 bytes of data. The following process data maps are
offered in the 871FM sensor:
• Data Map 0 (Default): Triggered, Margin, Proximity, Gain, Signal
• Data Map 1: Triggered, Margin, Proximity, Gain, Contrast, Temp
• Data Map 2: Triggered, Margin, Proximity, Gain, Count
• Data Map 3: Triggered, Margin, Proximity, Gain, Duration
Attribute Description
Triggered Displays the status of the sensor output. This process data element is a bit that indicates when the
target has been detected or not.
Margin Displays the status of the sensor margin low alarm. This process data element is a bit that indicates to
the operator if the sensor signal is marginal or unstable.
Proximity Displays the status of the proximity alarm. This process data element is a bit that indicates if there is
an object close to the threshold (below 1.0X) when the output is OFF.
Gain Displays the excess gain above the sensor threshold to confirm reliability of target detection.
Signal Provides the raw measurement value of the amount of light reflected from the target.
Contrast Displays the difference between the light signal levels that the sensor read the last time that the
output was ON versus the last time the output was OFF.
Temp Displays the current internal temperature of the sensor. This process data element provides the
internal temperature value and can increase or decrease depending on the influence of the ambient
temperature on the internal sensor temperature. This element does not provide a direct and exact
temperature measurement of the ambient temperature in the application.
Count Displays the sensor counter value when enabled. This process data element can count up to 65535
and can be reset via Explicit Messaging to the appropriate index. See Device Parameters on
page 71 for additional information about index.
Duration Displays the amount of time that the sensor output has been OFF (Duration Not Triggered) and ON
(Duration Triggered).