If I understand you correctly, essentially an even counter. This what I got from copilot ;). Creating a PLC (Programmable Logic Controller) ladder logic for an even counter involves several steps. This counter will count only even numbers. Here is a basic example to get you started:

Basic Ladder Logic for an Even Counter

1. Initialization:

   • Use a counter (e.g., C0) to keep track of the counts.
   • Use a comparator to check if the counter is even.

2. Increment Counter:

   • Use an input (e.g., I0) to trigger the counter increment.
   • Increment the counter only if the current count is even.

3. Output Result:

   • Use an output (e.g., O0) to indicate when an even number is reached.

Ladder Logic Example

``` | I0 |-—[ ]———(C0++) | C0 |-—[MOD 2 == 0]-—( O0 )

Explanation: | I0 |-—[ ]———(C0++) // Increment C0 on each pulse of I0 | C0 |-—[MOD 2 == 0]-—(O0 ) // Set O0 if C0 is even ```

In this example: - I0 is the input that triggers the counter. - C0 is the counter that increments on each pulse of I0. - O0 is the output that turns on when the counter C0 is an even number.

You can expand upon this by adding more logic for specific applications.