Rockwell Automation Publication 871FM-UM002A-EN-P - April 2017
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871FM Miniature Metal Flat Pack with IO-L
ink
Overview
Chapter 3
871FM Sensor
IO-Link Features
The following features are available in the 871FM sensor:
•
Triggered:
The process data bit that indicates the change in state of the
871FM sensor upon the detection of a target. The status of the triggered
bit can be viewed in a Studio 5000 controller tag.
•
Polarity:
Changes the operation of the triggered parameter. It performs
the same function as normally open or normally closed in standard I/O
(SIO) mode.
•
Margin Status:
The process data bit that indicates the target is within or
beyond 80% of the maximum sensing range of the sensor. The margin
status bit can be viewed in Studio 5000 controller tag.
•
Timer
: Measures the amount of time the output is present and absent
up to a maximum of 4 seconds.
Correlation
The AOP reads all configuration read/write (R.W.) parameters directly from
the connected IO-Link devices and compares the values to ones stored in the
controller. This action determines if there are differences (note that the
correlation does not work for read-only (R.O.) in the parameters or for
competitive sensors.). This feature is for Allen-Bradley enabled IO-Link devices
only and is an online only function that runs when opening up the AOP.
•
No differences
: You go directly into the AOP.
•
Differences
: If there are differences, you are provided with a differences
dialog window that identifies the IO-Link parameters that, do not match
for each channel. You can then choose, on a channel by channel basis
(where differences exist) to upload the parameters that are currently in
the device and store them in the controller. Alternatively, you can choose
to download the parameters that are stored in the controller to the
connected IO-Link device.