Siemens SIMATIC S7-1500 System Manual page 98

Configuring
6.1 Configuring the CPU
Upload blocks from the CPU to a project
You use this option to load blocks from the CPU back to the offline project.
The following requirements must be met before you start to backup the blocks:
● The project associated with the user program is open.
● The CPU has been set up in the project.
● The CPU is connected to the programming device/PC via the PROFINET interface.
PROFIBUS interfaces of the CPU and interfaces of CMs/CPs are also supported.
● The CPU is online.
● The blocks that are to be loaded must be compatible with STEP 7.
● The CPU is in STOP or RUN mode.
To upload all blocks from the CPU to a project, select the "Program blocks" folder in the
project tree. In the "Online" menu, select the "Upload from device (software)" command.
To upload an individual block, select the required block in the "Program blocks" folder. In the
"Online" menu, select the "Upload from device (software)" command.
When a block is uploaded, the start values from the load memory of the CPU is transferred
as start value in the offline version of the project.
A block is only uploaded from the CPU to a project if the online version of the block differs
from the offline version of the block in the project.
After you have completed the backup of blocks from the CPU, you can perform the required
changes offline and transfer the block to the CPU again. To do so, proceed as described in
the following section.
Upload blocks from a project to the CPU
To upload one or multiple blocks to the CPU, select the "Program blocks" folder in the
project tree. Select the "Download to device" > "Software (only changes)" command from the
shortcut menu. Alternatively, select the "Download to device" command in the "Online"
menu.
The block or blocks is/are compiled consistently. The download is terminated if an error
occurs during compiling. You can only load blocks that are compiled without errors.
Note
Loading external objects
If you load blocks to the CPU which contain references to objects (other DBs, FCs, FBs,
system constants, global tags) outside the project, these blocks cannot be compiled without
errors.
Reloading blocks while the plant is operating
Reloading blocks while the plant is operating can cause serious damage to property or
injury to persons if there are functional disturbances or program errors. Make sure that no
dangerous situations can arise before you start the actions.
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WARNING
Automation system
System Manual, 12/2014, A5E03461182-AC