Siemens SIMATIC S7-1500 System Manual page 257

Options for downloading
To download project data into the S7-1500R/H redundant system, you have the following
options:
• Loading the complete project data in STOP system state
• Loading the changed user program in RUN-Solo system state
• Loading the changed user program in RUN-Redundant system state
NOTE
Loading in the RUN-Redundant system state: Check for sufficient free space before a
write function
Before a write function is performed, the system checks whether there is enough free space
on the SIMATIC memory cards of the CPUs for the function. Write functions are online
functions with the PG/PC, e.g. test functions, loading a modified user program in the RUN-
Redundant system state.
If there is not enough space on a SIMATIC memory card or on both SIMATIC memory cards,
the write function is aborted and the redundant system continues operation with the original
configuration. The redundant system will remain in the RUN-Redundant system state.
NOTE
Password for confidential configuration data
With S7-1500R/H CPUs, the password for confidential PLC configuration data is only loaded
onto one of the two CPUs during loading. In order that the SYNCUP process works and that
the partner CPU also works properly, the password must be transferred to the partner CPU
before the SYNCUP, using the Online and Diagnostics editor:
• In the Online and diagnostics view, you specify the area "Password to protect confidential
PLC configuration data".
• Enter the required password and click the "Set" button. If the correct password has been
entered, the partner CPU can use the protected PLC configuration data and start the
SYNCUP process.
NOTE
Loading the safety program with an F-system SIMATIC Safety with the 1518HF-4 PN
CPUs
You can find the exact procedure in the SIMATIC Safety - Configuring and Programming
(https://support.industry.siemens.com/cs/ww/EN/view/54110126) programming and
operating manual.
Downloading project data to the CPU
By default, the project data is downloaded to the primary CPU.
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD
Commissioning
11.3 Commissioning procedure
257