A memory map organizes addresses for which PLC resources?

A memory map organizes addresses for which PLC resources?

• A. Firmware ROM addresses
• B. Only output module addresses
• C. Network addresses
• D. I/O and memory locations

Answer: (D)

A memory map shows how the PLC’s address space is organized, detailing where different resources are accessed by the CPU. It assigns specific addresses to I/O points (inputs and outputs) as well as internal memory locations (data registers, memory bits, and other data storage). This mapping lets the PLC read inputs, drive outputs, and store or retrieve data using consistent addresses. It isn’t about firmware ROM, which is fixed in the device, and it isn’t about network addressing, which is separate from the PLC’s internal I/O and data memory. So the memory map is the layout for I/O and memory locations.

A memory map shows how the PLC’s address space is organized, detailing where different resources are accessed by the CPU. It assigns specific addresses to I/O points (inputs and outputs) as well as internal memory locations (data registers, memory bits, and other data storage). This mapping lets the PLC read inputs, drive outputs, and store or retrieve data using consistent addresses. It isn’t about firmware ROM, which is fixed in the device, and it isn’t about network addressing, which is separate from the PLC’s internal I/O and data memory. So the memory map is the layout for I/O and memory locations.