Siemens SIMATIC S7-1500 System Manual page 342

Maintenance
13.5 Resetting CPUs to factory settings
Result after resetting to factory settings
The table below gives an overview of the contents of the memory objects after the reset to
factory settings.
Table 13-1 Result after resetting to factory settings
Memory object
Redundancy ID
Actual values of the data blocks, instance data blocks
Bit memories, timers and counters
Retentive tags of technology objects
Entries in the diagnostics buffer (retentive area)
Entries in the diagnostics buffer (non-retentive area)
IP address
Device name (module name)
Counter readings of the runtime meters
Time of day
NOTE
IP address conflict
Resetting the CPU to the factory settings also deletes the IP address of the CPU and resets the
redundancy ID to 1. Please note the following:
An S7-1500R/H redundant system that is already in operation is switched to the STOP system
state. If you reset the CPU with redundancy ID 2 to factory settings, that CPU is assigned the
IP address of the other CPU (with redundancy ID 1). This results in an IP address conflict. You
can only access the CPU with the emergency address. You can find information on the
emergency address in the section Backing up and restoring the CPU configuration (Page 298).
Possible remedy: Using the display, assign the CPU the redundancy ID previously set. You can
then access the CPU over the original IP address again.
NOTE
Password for protection of confidential configuration data
The password for protection of confidential configuration data is retained after the CPU is
reset to factory settings. The password is only deleted when the "Delete password for
protection of confidential PLC configuration data" option is set.
You can find additional information on the password for protection of confidential
configuration data in the Communication
(https://support.industry.siemens.com/cs/ww/en/view/59192925) function manual.
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Contents
Set to "1"
Initialized
Initialized
Initialized
Initialized
Initialized
Depends on the procedure:
• Using mode switch: Is deleted
• Using display: Is deleted
• Using STEP 7: Depends on the setting of the
"Retain IP address"/"Delete IP address" option but­
tons
Is set to "CPUcommon"
Initialized
Set to "00:00:00, Jan. 01, 2012"
System Manual, 11/2022, A5E41814787-AD
S7-1500R/H redundant system