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Rockwell Automation 1769-ASCII Compact I/O ASCII Module User Manual

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Rockwell Automation Publication 1769-UM012B-EN-P - January 2014

Chapter 2 Configure the 1769-ASCII Module

Input Ladder

The Input ladder does the following tasks:

Moves the RxID for Channel 0, at first scan, to the OldRx. This identifies

the initial RxID number.

Moves to see if the current RxID has changed that tells when the Data is in

the buffer ready to be moved.

Receives data and then the data is copied. A Latched bit is set that

identifies when the data has been copied to complete action on the new
data. Then the new RxID number is moved as the old to set up for new
data on the received.