Logix5000 Controllers General Instructions - SLAC Confluence

648 Function Block AttributesCreate a One Scan DelayTo produce a one scan delay between blocks, use the Assume DataAvailable indicator. In the following example, block 1 executes first. Ituses the output from block 2 that was produced in the previous scanof the routine.2 1Assume Data Available indicatorSummaryIn summary, a function block routine executes in this order:1. The controller latches all data values in IREFs.2. The controller executes the other function blocks in the orderdetermined by how they are wired.3. The controller writes outputs in OREFs.Publication 1756-RM003I-EN-P - January 2007