A PLC that operates with a ___ is commonly regarded as having a 16-bit architecture.

A PLC that operates with a data bus is regarded as having a 16-bit architecture because the data bus width indicates how many bits can be transmitted simultaneously between the processor and memory or other peripherals. In a 16-bit architecture, the data bus can transfer 16 bits of data at once, which defines the processing capability and performance of the system.

This architecture allows for handling larger amounts of data compared to lower-bit systems, facilitating more complex calculations and enabling more extensive data processing simultaneously. The 16-bit data bus can directly address a larger memory range, improving the overall efficiency and speed of the PLC operations. In industrial applications, this can lead to more sophisticated control and monitoring functions within various programmable logic controller tasks.

The other options do not directly relate to the architectural designation in the same way. Control logic refers to the algorithms and sequences of operations implemented in the PLC, while a memory module pertains to the storage of data and instructions. Input devices are the means through which data enters the PLC but do not define the architecture. Thus, it is the data bus that characterizes the PLC as 16-bit based on its capability to process information.