design a ladder diagram to illuminate continuously PL9 5 sec on and 5 second off
Here is a ladder diagram that will continuously illuminate PL9 for 5 seconds on and 5 seconds off:
```plaintext
|----[ ]----[ ]----[/]---[ ]----( )----[ ]----[ ]----[/]---|
| |
| |
| |
|------------------------------------------------------------|
PL9 is connected to the output of the above ladder logic diagram.
Explanation:
- The first rung has a normally open contact that is false when the PLC is started.
- The second rung has a normally closed contact connected to a timer. The timer is set to turn on for 5 seconds and then turn off for 5 seconds.
- When the timer is on, the normally closed contact is closed, allowing PL9 to be energized.
- When the timer is off, the normally closed contact is open, de-energizing PL9.
```
This ladder diagram will continuously illuminate PL9 for 5 seconds on and 5 seconds off.