Maintenance And Repair - Siemens SIMATIC S7-1500 System Manual

Reference
You can find more information on "Reset to factory settings" in the section on memory areas
and retentivity in the function manual Structure and use of the CPU memory
(http://support.automation.siemens.com/WW/view/en/59193101), and in the STEP 7 online
help. For information on CPU memory resets, please refer to the section CPU memory reset
(Page 294).
13.6

Maintenance and repair

The R/H CPUs are maintenance-free.
NOTE
Repairs to the R/H CPUs may only be carried out by the manufacturer.
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD
Maintenance
13.6 Maintenance and repair
343