Siemens Sinumerik 840DiE sl - Page 303

01/2007
11.3 System data
11-303
© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
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T
M
T
DP
Windows XP
Part 1
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Windows XP
Part 2
NCK
Part 1
(general)
NCK
Part 2
(position
controller
and
interpolator)
T
DP
DP cycle time: DP cycle time
T
M
Master time: Offset of the start time for NCK
position controller
Fig. 11-3 CPU time division between Windows XP and NCK
S MD10185: $MN_NCK_PCOS_TIME_RATIO (CPU time component NCK)
The default value for the NCK CPU time share is 50%. An individual setting can
only be made by the following formula:
MD10185 >= 300 * (T
pos max
* MD10070 + T
IPO max
+ 0.2 ms) / MD10071
with:
–
T
pos max
and T
IPO max
T
pos max
[ms] and T
IPO max
[ms] are the maximum net run time of each position
controller or interpolator. The data are displayed by with HMI Advanced (option)
under:
Operating area switchover > Diagnosis > Service displays >
System resources
– MD10070: IPO_SYSCLOCK_TIME_RATIO (factor for interpolation clock pulse)
– MD10071: IPO_CYCLE_TIME (interpolator clock pulse) [ms]
Note
The values displayed in menu: System resources of HMI Advanced refer to the
total power of the CPU
, not to the CPU time share of the NCK set in MD 10185:
NCK_PCOS_TIME_RATIO.
The values for T
pos max
and
IPO max
are considerably influenced by applications
active under Windows XP due to cache effects of the PCU processor. To calcu-
late 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 de-
scribed above no longer change, you can calculate the above formula with a
value of 200 instead of 300.
Individual setting
11 NCK Commissionin
g
with HMI Advanced