Siemens SIMATIC S7-1500 System Manual page 380

Note
Response time when downloading a modified user program into the R/H CPUs in the
RUN-Redundant system state
During the download process in the RUN-Redundant system state, the response time of the
system is restricted compared with the normal redundant mode. The more changes the user
program contains, the higher the impact on the response time.
Requirements
• Possible as of firmware version V2.8
• SIMATIC memory cards of the R/H CPUs with sufficient free storage space
• The redundant system is in the RUN-Redundant system state.
Procedure
There are various ways of downloading the modified user program in RUN-Redundant system
state:
Options for down-
loading in the RUN-
Redundant system
state
Downloading the modi-
fied user program to
the primary CPU
Downloading the modi-
fied user program to
the backup CPU
Result: The redundant system remains in the RUN-Redundant system state with the modified
user program.
Note
The redundant system remains in the RUN-Redundant system state only with the menu
command "Download to device" > "Software (only changes)".
The following menu can subsequently stop the redundant system:
• "Download to device" > "Hardware configuration"
• "Download to device" > "Software (all blocks)"
• Download to device >" Hardware and software" (only changes)
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF
Proceed as follows to download the modified user program in the RUN-
Redundant system state:
1. Select the program folder or the blocks of the modified user program in
the project tree.
2. Select the "Download to device" button or select the "Online > Download
to device" menu command.
1. Select the S7-1500R/H system in the project navigation.
2. Press the right mouse button. Select the "Download to device" > "Soft-
ware (only changes)" command from the shortcut menu.
1. Select the S7-1500R/H system in the project navigation.
2. Press the right mouse button. Select the "Download to backup CPU" >
"Software (only changes)" command from the shortcut menu.
Commissioning
12.3 Commissioning procedure
379