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FFL (FIFO load) parameters, part 2

FFL (FIFO load) parameters, part 2 - Ladder Logic Tutorial

From the course: PLC Program Flow and Control Instructions

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FFL (FIFO load) parameters, part 2

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- [Narrator] To continue with FIFO load parameters, the control parameter is the address of the control file for the instruction. It includes the status bits, stack length, and position. Example is R6:0 meaning file six word zero. The status bits of the control word are; enabled bits when the instruction is true, done bits when the instruction position equals the length, empty bits when all the data have been unloaded from the FIFO file. The control file also includes length and position. You can refer to the following manual page 545 for more details about Fifo load instructions. The control file of the load instruction also includes the length and position. Links parameter specifies the maximum number of words in this stack. In this FIFO stack you see, the length is five words. Position parameter is the next available location where to put the data in. The first address in the stack is position zero. For example, if FIFO…

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