Programming the route VOIE 3

What is the purpose of the route VOIE 3 ?

Synoptic-Track 3

By doing the same reasoning, we see that this time the turnout D is in the diverging position, as F, but, in addition, C must be diverging and G must be in the direct position (reminder: G has been represented upside down for drawing convenience, but it is clear that its green LED is on).

How do we program the route VOIE 3 ?

Let’s fill in the table seen above:

Turnout A B C D E F G
Coil Q1 Q2 Q3 Q4 Q5 Q6 Q7
Route VOIE 1 1 X X 0 X 0 X
Route VOIE 3 1 X 1 1 X 1 0

The coil SQ1 (turnout A) must therefore be excited by VOIE 1 OR VOIE 3, hence the new writing (remember that OR is written with the + sign):

We can see that if a coil is to be controlled by several routes, these different commands are added with a logical OR.