On the Volume four_Digital under Permissive and interlock circuits section figure.
The label on CR1 for red LED was wrong it should be CR2 for red LED.
<snip>

 

This link..,

http://www.allaboutcircuits.com/vol_4/chpt_6/3.html

This picture?

CR1 is not referring to the LED, it is referring to the Ladder Logic relay CR1 coil.

Designations can be tricky, especially if you get used to seeing certain ones for certain components.

I am not the final arbiter of the book. That would be our editor, I'm just the first responder.