Siemens SIMATIC S7 System Manual page 91

What happens when you download
STEP 7-Micro/WIN SMART and the CPU perform the following tasks in sequence on your
project components when you download:
Step
1.
2.
3.
4.
5.
If the download attempt produces compiler errors or download errors, correct the errors and
reattempt the download.
See also
Uploading project components (Page 92)
See also
Hardware troubleshooting guide (Page 578)
S7-200 SMART
System Manual, V2.3, 07/2017, A5E03822230-AF
Action
Project components in the program
editors serve as input for the download
operation, based on the download
objects you selected. The program
editors can include new program data
that you've entered, a saved and
opened .smart project, or an uploaded
ASCII import file.
STEP 7-Micro/WIN SMART compile
A compile or download command
starts the compiler. If the compile
passes, control passes to the next
step; if not, the compile or download
operation exits.
Send blocks to CPU across communi-
cation network for PLC compile.
PLC compile
If PLC compile succeeds, control
passes to the next step; if not, down-
load exits with error(s).
Program is in CPU permanent memory
and ready to be executed in RUN
mode.
4.3 Saving and restoring data
Related topics, additional description
File open
Range checking
Project file I/O errors
Program editor errors
All STEP 7-Micro/WIN SMART compiler errors
are listed in the Output Window. Double-click
the error and the editor scrolls to the error loca-
tion. A successful compile shows the resulting
block size of the program and data block.
Communication Errors
To download (Editor to PLC) or upload (PLC to
Editor), PLC communication must be operating
properly. Make sure your network hardware and
PLC connector cable are working.
The PLC Compiler verifies that the PLC hard-
ware supports all program instructions, ranges,
and structure.
Click the PLC button from the Information area
of the PLC menu to view the first compile error
found.
Fatal Errors (Page 796) and non-fatal run-time
errors (Page 792) are accessible from the In-
formation area of the PLC menu.
PLC concepts
91