Arranging two XIC instructions in series in a PLC program demonstrates which type of logic element?

Arranging two XIC (Examine If Closed) instructions in series within a PLC program illustrates AND logic. In this configuration, the output will only be true (or "on") if both XIC instructions are true. Each XIC instruction checks for a specific condition; therefore, for the overall output to be active, both conditions must be fulfilled simultaneously.

This series arrangement essentially requires both inputs to be present before the output can be triggered, which aligns perfectly with the principles of AND logic. In contrast, other logic types like OR would allow for a true output with just one active condition, while NAND and XOR have distinct functionalities that do not apply to this scenario. Thus, using XICs in series clearly demonstrates the AND operation within the context of a PLC program.