Branches...

I may be wrong, but i can't find a good explination on this one.

Is there a difference between using a "New branch" and "Next Branch Level" in RSLogix 5000?

I thought that if there were no "additional" conditions on a branch, a new "level" for the current branch should be used, but if there are more conditions a new branch should be used.

+--||-----+

|         |

|         |

++-||----++

 |       |

 |       |

 +-||----+

or

+--||-----+

|         |

|         |

+--||-----+

|         |

|         |

+--||-----+

Yes there is a difference. You cannot nest branches indefinitely. You can extend branches almost indefinitely.

Nested branches also require more instructions.

Your first example requires the following instructions:
BST XIC NXB BST XIC NXB XIC BND BND

While the second requires only:
BST XIC NXB XIC NXB XIC BND

In Logix5000 you are limited to six nested branches. In Logix500 the limit is four.

See this thread http://www.plctalk.net/qanda/showthread.php?t=43027

Also note that in a L5K you don't have to nest output instructions if there aren't extra conditions. You can place outputs in series.
---( )-----{ }------{ )---

thanks!