From the course: PLC Memory Organization

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I/O address format for rack-based PLC

I/O address format for rack-based PLC - Ladder Logic Tutorial

From the course: PLC Memory Organization

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I/O address format for rack-based PLC

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- [Instructor] The I/O addresses for rack-based system are derived using the slot location of the input and output modules within the PLC rack. The rack is the back plane where the controller in the other modules are placed. The modules like input and output modules or the processor module can be plugged in in different locations on the rack or chasis. A slot location is simply the physical location to insert a module on the rack. In the example you see here, an I/O module is being inserted into slot location one. Modules are counted starting from zero. Usually the first module is the PLC controller in slot zero. Then the input and output modules. Here, the controller is in slot zero. Input module is in slot one and output module is in slot two. Keep in mind that there are different arrangements for placing the modules according to various designs. So you might see them in different slots. Here on the left-hand…

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