2.3           Layout diagram

To start routing, a layout diagram is required. The routing is two-dimensional.

The following conditions have to be complied:

·            In the layout diagram the shapes have to be placed in frontal view.

·            Objects in the layout diagram have to be placed with an angle of 0° or 90°.

·            The pin position of all layout symbols must be center-left. This applies to devices, terminals, cable ducts, mounting rails and mounting plates. To control this, the Size & Position window in Visio can be checked.

·            The reference point of the layout form has to be bottom left.

·            The sheets of the layout diagram have to be associated with the same unit as the devices and terminals displayed in the layout diagram.

·            When placing devices and cable ducts, it must be ensured that there are no overlaps.

In the layout diagram a scale can be defined that is taken into account for the layout representation and the length calculation.