44 Rockwell Automation Publication 1756-UM013B-EN-P - October 2019
Chapter 2 Features Common to 1756 ControlLogix Digital Safety I/O Modules
Module Firmware
The digital safety I/O modules are manufactured with module firmware
installed. If updated module firmware revisions are available in the future, you
can update the firmware.
If the module is configured for Exact Match, the controller checks to make sure
that the module has the correct firmware revision.
Updated firmware revisions are made available for various reasons, for example,
to correct an anomaly that existed in previous module firmware revisions.
You access updated firmware files at the Rockwell Automation® Product
Compatibility and Download Center (PCDC). The PCDC is available at:
https://compatibility.rockwellautomation.com/Pages/home.aspx
Only download firmware and access product release notes from the Rockwell
Automation® PCDC.
Do not download firmware from non-Rockwell Automation sites.
Producer/Consumer
Communication
Digital safety I/O modules use the Producer/Consumer communication model
to produce data without a controller polling them first. The modules produce the
data, and the owner-controller (and controllers with a Listen Only connection to
the module) can consume the data.
When an input module produces data, the controllers can consume the data
simultaneously. Simultaneous data consumption minimizes the need for one
controller to send the data to other controllers.
IMPORTANT Verify that the module firmware revisions for the 1756 ControlLogix digital
safety I/O modules that you use are correct before commissioning your system.
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