From the course: PLC Program Flow and Control Instructions

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FFL (FIFO load) parameters, part 1

FFL (FIFO load) parameters, part 1 - Ladder Logic Tutorial

From the course: PLC Program Flow and Control Instructions

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FFL (FIFO load) parameters, part 1

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- [Instructor] For our first in first out instructions, both load and unload half the same parameters, except load instruction has a source and unload instruction has a destination. I'm going to go over the parameters of FIFO load instruction first, starting with source. The source is the word address from which the data are entered into the FIFO file. Data of the source could be coming from an input device, like thumbwheel input address, or from an internal location, like a counter accumulator. Second parameter is FIFO. This is the address of the file in which the data are entered. The address must start with a hashtag sign. The FIFO parameter specifies the first word of the FIFO stack. Here is an example, data is coming from the counter accumulator, which is the source, and saved in file B3, starting from ward zero. Typically, the source and the FIFO are the same data type. We know that there are some differences…

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