Which aspect of a counter is typically not changeable during operation?

In a counter, the preset value is typically designed to remain constant during its normal operation. This value defines the number that the counter will reach before it resets or triggers an output condition. Once the counter is set with a preset value, it is intended to be used to count toward that specific number during operation.

Changing the preset value while the counter is actively counting could lead to inconsistency in operation and unpredictable behavior, as the function of the counter relies heavily on the stability of that preset.

In contrast, the accumulated value of the counter changes continuously as it counts up or down based on the input logic. The input logic itself can be adjusted to change how the counter behaves, and while it is possible to change the tag associated with the counter in a programming environment, this is also more of an administrative change rather than one that affects the counter's counting process.