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 13-1Result after resetting to factory settings
Memory object Contents
Redundancy ID Set to "1"
Actual values of the data blocks, instance data blocks Initialized
Bit memories, timers and counters Initialized
Retentive tags of technology objects Initialized
Entries in the diagnostics buffer (retentive area) Initialized
Entries in the diagnostics buffer (non-retentive area) Initialized
IP address Depends on the procedure:
• Using mode switch: Is deleted
• Using display: Is deleted
• Using STEP7: Depends on the setting of the
"Retain IP address"/"Delete IP address" option but
tons
Device name (module name) Is set to "CPUcommon"
Counter readings of the runtime meters Initialized
Time of day Set to "00:00:00, Jan. 01, 2012"
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.
342
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD
Maintenance
13.5 Resetting CPUs to factory settings
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