06.03
10.3 System data
10-292
Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
The interpolation cycle can be freely selected in integer multiples of the position
controller cycle.
S
MD10070 IPO_SYSCLOCK_TIME_RATIO (factor for the interpolation cycle)
The processor power of the PCU must be shared between the NC and Win-
dows NT. By default, the NC is assigned 65%.
The value for the CPU time share of the NC is the maximum value that the NC
will only use in the worst case. If the NCK requires less computation time, it will
cede it dynamically to Windows NT.
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
T
M
T
DP
Windows NT
Part 1
ÉÉÉÉÉ
ÉÉÉÉÉ
ÉÉÉÉÉ
Windows NT
Part 2
NC
Part 1
(general)
NC
Part 2
(position controller
and
interpolator)
T
DP
DP cycle time: DP cycle time
T
M
Master time: Shift of starting time of the NC
position control
Fig. 10-3 CPU time sharing between Windows NT and NC
In NC machine data
S
MD10185: NCK_PCOS_TIME_RATIO (NCK computation time portion)
the maximum CPU time share of the NC is set with reference to a DP cycle. The
default value is 65%.
An individual setting can only be made by the following formula:
MD10185 >= 300 * (T
pos max
* M T
IPO max
+ 0.2msecs) / MD10071
with:
–
T
pos max
[ms] and T
IPO max
[ms]: maximum netruntimes of the position controller or
interpolator.
Display on HMI Advanced (optional):
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].
Interpolation cycle
NCK CPU time
share
Default value
Individual setting
10 NC Start-Up with HMI Advanced
