What does the LED display connected to a PLC output module show?

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The LED display connected to a PLC output module shows the decimal form of the binary coded decimal value (BCD). This format allows users to easily read and interpret the output state represented in binary.

In a BCD representation, each decimal digit is encoded in a four-bit binary number. For instance, the decimal number 25 would be represented as 0010 0101 in BCD, where the first group (0010) corresponds to the digit '2' and the second group (0101) corresponds to the digit '5'. The display often translates these binary values into a more user-friendly decimal form, making it easier to understand the status of the outputs without needing to convert or interpret binary codes directly.

This clarity is especially valuable in industrial settings where quick diagnostics of system statuses are essential. The other options do not align with the common use of LED displays in this context. Binary numbers might be displayed, but they're typically converted to decimal for human readability. Hexadecimal values are not standard for these applications, as the focus is generally on decimal representation. Raw input values from sensors are not shown on output modules but are relevant at input modules, further solidifying the appropriateness of the chosen answer.

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