2011

■ Edits to a panel footprint update the associated schematic parent, child
symbols, nameplates, and peer one-line symbols.
■ Edits to a panel nameplate update the associated schematic parent, child
symbols, panel footprints, and peer one-line symbols.
■ Edits to a schematic child do not update the associated schematic parent,
panel footprints, nameplates, or peer one-line symbols.
■ Edits to a one-line terminal do not update any other terminal symbols.
Schematic and panel symbol relationship
The schematic ladder diagram can be created first and the physical panel
layout created from the schematic drawing.
Each symbol shown on the schematic ladder diagrams can map to a scaled,
physical representation on the panel layout drawings. The physical layout
drawing might be a control panel enclosure door layout. The door layout
shows where to mount each component and can indicate the size of the hole
in the sheet metal door for mounting.
NOTE One-line terminals are not mapped to panel layout terminals.
Example
For example, pilot light components come in many styles, sizes, and ratings
from dozens of vendors. On the schematic ladder diagrams, all pilot lights of
a given type are identified by the same schematic symbol whether they are
miniature pilot lights or a large, explosion projected pilot light. It is on the
physical panel layouts where the pilot lights are shown as they actually look
and in actual size (that is, the physical footprint representation).
Look at the three pilot light symbols shown in this schematic drawing.
1532 | Chapter 19 Panel Layout