User program Action Feature to note
FB, FC, DB, user data type UDT New, Change, Delete -
FB, FC Change code, Change interface -
Change properties (change "Optimized
block access" attribute)
-
New Actual values in the new data blocks are set to
start values.
Change name/type of tags, add or delete
tags (memory reserve not enabled)
Actual values of tags in the structurally modi
fied data blocks are set to start values.
DB
Add new tags (memory reserve activated) Actual values of added tags within the memory
reserve are set to start values.
PLC tags Add (timers, counters, bit memories) -
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 download
ing in the RUN-
Redundant system
state
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.
Downloading the modi
fied user program to the
primary CPU
1. Select the S7-1500R/H system in the project navigation.
2. Press the right mouse button. Select the "Download to device" > "Software
(only changes)" command from the shortcut menu.
Downloading the modi
fied user program to the
backup CPU
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.
262
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD
Commissioning
11.3 Commissioning procedure
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