Siemens CPU 410-5H Process Automation - Step 1: Modify the Hardware Configuration Offline; Step 2: Modify and Download the User Program

System modifications during redundant operation
10.4 Removal of components
CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 10/2013, A5E32631667-AA
149
10.4.1
Step 1: Modify the hardware configuration offline
Starting situation
The fault-tolerant system is operating in redundant system mode.
Procedure
1. Perform offline only the configuration modifications relating to the hardware being
removed. As you do, delete the icons to the channels that are no longer used.
2. Compile the new hardware configuration, but do
not
load it into the target system just yet.
Result
The modified hardware configuration is in the PG/ES. The target system continues operation
with the old configuration in redundant system mode.
10.4.2
Step 2: Modify and download the user program
Starting situation
The fault-tolerant system is operating in redundant system mode.
CAUTION
The following program modifications are not possible in redundant system mode and result
in the system mode Stop (both CPUs in STOP mode):
• Structural modifications to an FB interface or the FB instance data.
• Structural modifications to global DBs.
• Compression of the CFC user program.
Before the entire program is recompiled and reloaded due to such modifications the
parameter values must be read back into the CFC, otherwise the modifications to the block
parameters could be lost. You will find more detailed information on this topic in the
CFC for
S7, Continuous Function Chart manual.