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Logix5000 Controllers General Instructions - SLAC Confluence

Logix5000 Controllers General Instructions - SLAC Confluence

Logix5000 Controllers General Instructions - SLAC Confluence

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Input/Output <strong>Instructions</strong> (MSG, GSV, SSV, IOT) 163The following diagrams show how the typed and word-rangecommands differ. The example uses read commands from a PLC-3processor to a <strong>Logix5000</strong> controller.Typed read commandWord-range read command16-bit words inPLC-3 processor32-bit words in<strong>Logix5000</strong> controller16-bit words inPLC-3 processor32-bit words in<strong>Logix5000</strong> controller1112122243333444The typed commands maintain data structure and value.The word-range commands fill the destination tagcontiguously. Data structure and value change depending onthe destination data type.Specify PLC-2 messagesThe PLC-2 message types are designed for PLC-2 processors.Select this commandPLC2 Unprotected ReadPLC2 Unprotected WriteIf you want toread 16-bit words from any area of the PLC-2 data table or the PLC-2 compatibility file ofanother processor.write 16-bit words to any area of the PLC-2 data table or the PLC-2 compatibility file ofanother processor.The message transfer uses 16-bit words, so make sure the <strong>Logix5000</strong>tag appropriately stores the transferred data (typically as anINT array).Publication 1756-RM003I-EN-P - January 2007

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