Memory Reset / Reset To Factory Defaults - Siemens S7-400 Equipment Manual

Diagnostics and upkeep
7.3 Maintenance
What to do if a download is interrupted
Disturbances or collisions on the network can lead to packets being lost. In such cases, this
can lead to an interruption of the firmware download. The firmware loader then signals a
timeout or negative response from the module being loaded. En entry is made in the
diagnostics buffer. The CP restarts with the firmware that existed before the aborted
download.
Repeat the download using the active MAC address after the CP has started up again.
If you cannot start the download again following an aborted attempt, you should turn off the
entire rack and turn it on again. You can then restart the firmware download.
7.3.5

Memory reset / reset to factory defaults

The CP has a two-level function available for resetting:
• Memory reset
• Resetting to factory setting
The functions for resetting and resetting to factory defaults described here do not change the
configuration data on the CPU! Only the data kept on the CP (CPLUG and RAM) is deleted.
If you subsequently upload the configuration data from the CPU to a PG you will always
obtain the configuration data that was previously on the CP (with parameters, connections, IP
address).
Note
Memory reset - ACL (access control list) / firewall / VPN configuration
After a memory reset on the module, the following applies:
• ACL or firewall configurations remain active.
• The VPN configuration is deleted.
Effect: After a memory reset, the module can no longer be reached via a VPN tunnel.
Note
Memory reset - PROFINET IO is being used
If you run a memory reset a CPU as of version 5.2, the CP memory is also reset if you are
using PROFINET IO.
Note the restrictions when a protection level is configured for the CPU. See section Effects of
protection levels (Page 57) for information on this.
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Equipment Manual, 03/2023, C79000-G8976-C256-07
CP 443-1 Advanced