Rockwell-automation 1734-485ASC POINT I/O ASCII User Manual Manuale Utente Scaricare il pdf (Pagina 65)

Publication 1734-UM009B-EN-P - July 2003

Using the ASCII Modules 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.

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Rockwell-automation 1734-485ASC POINT I/O ASCII User Manual Manuale Utente Pagina 65