NC Commissioning with HMI Advanced
11.3 System data
Manual
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
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Figure 11-3 CPU time division between Windows XP and NC
●
MD10185 $MN_NCK_PCOS_TIME_RATIO (CPU time share NC)
Individual setting
The default value for the NC CPU time share is 50%. An individual setting can only be made
by the following formula:
MD10185 >= 300 * (T
Pos max
* M T
IPO max
+ 0.2ms) / MD10071
with:
●
T
Pos max
and T
IPO max
T
Pos max
[ms] and T
IPO max
[ms] are the relevant maximum netruntime of the position
controller or interpolator. The data is displayed via HMI Advanced (option) under:
Operating area switchover > Diagnosis > Service Displays > System Resources
●
MD10070 $MN_IPO_SYSCLOCK_TIME_RATIO (factor for the interpolation cycle)
●
MD10071 $MN_IPO_CYCLE_TIME (interpolator cycle) [ms]
Note
The values displayed by HMI Advanced in the System Resources menu refer to the total
power of the CPU, not just to the CPU time share of the NC set via MD 10185
$MN_NCK_PCOS_TIME_RATIO.
The values for T
pos max
and T
IPO max
are considerably influenced by applications active under
Windows XP due to cache effects of the PCU processor. To calculate these value, it is
therefore necessary to activate Windows XP applications demanding a lot of CPU time in
parallel with execution of NC part programs.
When the maximum values for T
pos
and T
IPO
displayed as you proceed as described above
no longer change, you can calculate the above formula with a value of 200 instead of 300.