Special Features; Special Situations When Downloading In Step 7; Cpu Behavior When Shutting Down The Operating System; Timeouts - Siemens SIMATIC S7-1500 Operating Instructions Manual

7.4

Special features

7.4.1

Special situations when downloading in STEP 7

No connection possible
In order to download the project to the target system, an online connection must be
established.
If an online connection to the target system is not possible, check the interface settings, such
as the IP address.
7.4.2

CPU behavior when shutting down the operating system

When you switch off your PC, the operating system is shut down automatically and all active
applications are closed.
Note
Loss of retentive data
To prevent the loss of retentive data during a Linux restart, first shut down the CPU with the
CPU Control tool command "--PowerOffCPU".
You can shut down the operating system using the following actions:
● In case of graphical user interface, PC is switched off via the corresponding button
● PC is shut down via the command-line command "shutdown"
When you restart the PC, the CPU starts as previously configured.
7.4.3

Timeouts

The PCI Express bus of the PC is shared by all applications on the PC. A high PCI Express
bus load can therefore lead to runtime influences between applications. To keep the number
of timeouts as low as possible, use a high send clock for isochronous mode in particular and
avoid large loads (for example: 3D graphics).
CPU 1505SP (F) Ready4Linux Version 2.7
Operating Instructions, 05/2019, A5E46864285-AA
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7.4 Special features
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