Logix5000 Controllers General Instructions - SLAC Confluence

162 Input/Output Instructions (MSG, GSV, SSV, IOT)Specify PLC-3 messagesThe PLC-3 message types are designed for PLC-3 processors.Select this commandPLC3 Typed ReadIf you want toread integer or REAL type data.For integers, this command reads 16-bit integers from the PLC-3 processor and storesthem in SINT, INT, or DINT data arrays in the Logix5000 controller and maintains dataintegrity.PLC3 Typed WriteThis command also reads floating-point data from the PLC-3 and stores it in a REAL datatype tag in the Logix5000 controller.write integer or REAL type data.This command writes SINT or INT data, to the PLC-3 integer file and maintains dataintegrity. You can write DINT data as long as it fits within an INT data type (−32,768 ≥data ≤ 32,767).PLC3 Word Range ReadThis command also writes REAL type data from the Logix5000 controller to a PLC-3floating-point file.read a contiguous range of 16-bit words in PLC-3 memory regardless of data type.This command starts at the address specified as the Source Element and readssequentially the number of 16-bit words requested.PLC3 Word Range WriteThe data from the Source Element is stored, starting at the address specified as theDestination Tag.write a contiguous range of 16-bit words from Logix5000 memory regardless of datatype to PLC-3 memory.This command starts at the address specified as the Source Tag and reads sequentiallythe number of 16-bit words requested.The data from the Source Tag is stored, starting at the address specified as theDestination Element in the PLC-3 processor.Publication 1756-RM003I-EN-P - January 2007