Beijer Electronics BoX2 base v2 Configuration Manual page 32

Getting Started and Commonly Used Functions
NOTE
The PLC functionality has support for storing non-volatile variables. Those
variables can be stored dynamically in two different modes:
• Power-fail mode (Default setting)
If the voltage drops below a hardware given threshold (that is, during a power
loss or power dip), the system instantly copies all persistent data defined in
the PLC application from RAM into the battery backed SRAM. They are verified
and restored when the device is restarted.
• Cyclic mode
The PLC is instructed to store all retain and persistent data directly into SRAM
synchronously with every PLC cycle. This means all device types can use the
whole available memory, which is 128 kB. However, writing to the SRAM might
increase the configured PLC cycle depending on the size of used retain and
persistent data, because a SRAM is naturally slower than a RAM. This possible
increase is dependent of the application and to find out about the possible
increase one would need to monitor the configured task(s) of the project. For
projects with large amounts of persistent data, cyclic mode is recommended.
These settings must match the settings made in "Retain data options", see
Update the CODESYS Runtime Version Using USB or SD Card
CODESYS Runtime Version Over
Make sure that Create directory for project is checked and click Next.
5.
6. In the following window, choose the programming language for the POU created by the wizard,
and click Finish.
5.4.2. Compile the Project
When the program is ready, a compile is needed to generate the executable code for the BoX2
device.
There are two ways to compile the project, the Generate code function which is an offline compile
and the online compile, which is triggered when logging into the device if there is a code change
from the last online session.
2023-06
Ethernet.
32
or Update the
Beijer Electronics, MAEN363