Changing The Cpu Parameters; Modifiable Cpu Parameters - Siemens SIMATIC S7-400H Manual

11.6

Changing the CPU Parameters

Only certain parameters (object properties) of the CPUs can be modified during
operation. They are identified in the screen form by blue text (if you have set blue
as the color for dialog box text on the Windows Control Panel, the modifiable
parameters are shown in black).
Notice
If you modify parameters that should not be changed, there is no automatic
transfer to the CPU whose parameters have been modified. In this case the event
W#16#5966 is entered in the diagnostics buffer. You must reassign the previously
valid values in the configuration to the parameters you incorrectly modified.
Table 11-1 Modifiable CPU parameters
Startup
Scan cycle/clock memory
Memory
Time-of-day interrupts (for
every time-of-day interrupt every time-of-day interrupt
OB) OB)
Watchdog interrupt (for
every watchdog interrupt every watchdog interrupt
OB)
Diagnostics/clock
Security
Automation System S7-400H Fault-tolerant Systems
A5E00068197-07
Tab
Monitoring time for signaling readiness by modules
Monitoring time for transferring parameters to modules
Scan cycle monitoring time
Cycle load due to communications
Size of the process image of inputs
Size of the process image of outputs
Local data (for the different priority classes)
Communication resources: maximum number of
communication jobs (you are only allowed to increase this
parameter compared to its previously configured value.)
"Active" check box
"Execution" list box
Starting date
Time
Execution
Phase offset
Correction factor
Protection level and password
Modifying the System During Operation
Modifiable Parameter
11-41