Siemens CPU 410-5H Process Automation - Page 156

System modifications during redundant operation
10.5 Editing CPU parameters
CPU 410-5H Process Automation/CPU 410 SMART
156 System Manual, 10/2013, A5E32631667-AA
Tab
Editable parameter
Starting date
Time
Watchdog interrupt (for each watchdog
interrupt OB)
Execution
Phase offset
Diagnostics/clock
Correction factor
Security
Security level and password
H parameter
Test cycle time
Maximum cycle time extension
Maximum communication delay
Maximum inhibit time for priority classes > 15
Minimum I/O retention time
*)
Modifying these parameters also modifies the memory content.
The selected new values should match both the currently loaded and the planned new user
program.
Starting situation
The fault-tolerant system is operating in redundant system mode.
Procedure
To edit the CPU parameters of a fault-tolerant system, follow the steps outlined below.
Details of each step are described in a subsection.
Step
What to do?
See section
1 Editing CPU parameters offline Step 1: Editing CPU parameters offline
(Page 157)
2
Stopping the reserve CPU
Step 2: Stopping the reserve CPU (Page 157)
3 Downloading modified CPU parameters to the reserve
CPU
Step 3: Downloading a new hardware
configuration to the reserve CPU (Page 158)
4 Switching to a CPU with modified configuration Step 4: Switching to CPU with modified
configuration (Page 158)
5 Transition to redundant system mode Step 5: Transition to redundant system mode
(Page 159)