Publication 1734-UM009A-EN-P - June 2002
Using the 1734-232ASC Module with the ControlLogix System Application Examples B-5
The following ControlLogix ladder logic checks to see if the
transaction ID in Local:1:I.Data[0] has changed from a previously
stored value. If it has changed, the data starting in Local:1:I.Data[4] is
copied to a file and the current ID is stored into a data location.
If data is being received quite often, we recommend storing the
receive data into some kind of large rotary buffer so as not to
overwrite an older packet before it is decoded.
Spare Allen-Bradley Parts
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