System modifications during operation
17.7 Editing CPU parameters
S7-400H
System Manual, 03/2012, A5E00267695-11
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17.7
Editing CPU parameters
17.7.1
Editing CPU parameters
Only certain CPU parameters (object properties) can be edited in operation. These are
highlighted in the screen forms by blue text. If you have set blue as the color for dialog box
text on the Windows Control Panel, the editable parameters are indicated in black
characters.
NOTICE
If you edit any protected parameters, the system will reject any attempt to changeover to
the CPU containing those modified parameters. The event W#16#5966 is written to the
diagnostic buffer. and you will then have to restore the wrongly changed parameters in the
parameter configuration to their last valid values.
Table 17- 1 Modifiable CPU parameters
Tab
Editable parameter
Start-up
Monitoring time for signaling readiness by modules
Monitoring time for transferring parameters to modules
Cycle/clock memory
Scan cycle monitoring time
Cycle load due to communication
Size of the process image of inputs
*)
Size of the process image of outputs
*)
Memory
Local data for the various priority classes
*)
Communication resources: Maximum number of communication jobs.You may
only increase the configured value of this parameter
*)
.
Time-of-day interrupts (for each time-of-
day interrupt OB)
"Active" checkbox
"Execution" list box
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.
