Rockwell Automation Publication 1756-RM100F-EN-P - October 2018 79
Replacement Considerations with CompactLogix and Compact GuardLogix Systems Chapter 3
Download the Program to
the Controller
The first time that you download a program, it can take longer than subsequent
downloads. These situations can affect download/compile times:
• The capability of the personal computer or laptop.
• You download the project immediately after a project import or upload,
but before Logix Designer has compiled the project once.
• You edit a User Defined Tag (UDT), Add-On Instruction (AOI), or an
object that is used in many places.
• Increased load when Logix Designer compiles and generates code.
Build Button
The new Build button in Logix Designer creates binary files that are compiled
from user subroutines, and caches them in the project .ACD file.
If these files are present in the project during a download, then Logix Designer
does not have to recompile them, and saves time during the download process.
Every download requires that only the changed subroutines must be
recompiled. You can perform a build offline, save the project .ACD file, and
later distribute it to many controllers without recompilation.
This manual build step is optional. If you do not use the build button, Logix
Designer builds all necessary files when you initiate a download.
An imported project requires a complete rebuild, and extends the download
process the first time you attempt a download.
Downloading Workflow Change on page 80
provides an explanation of the
download changes for 5380 controllers.
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