Comment every rung
The instructions already show what a rung does. The comment says why.
Add a comment
- Stop the PLC. Editing is locked while it runs.
- Click Add comment above the rung, or select the rung and type in the Inspector.
Good comments
- "Fan runs on 5 s after the motor stops to cool it" says why. "TOF on Motor" does not.
- Note anything a reader cannot see in the rung, such as how a sensor is wired.