Nck Utilization - Siemens SINUMERIK 840D sl Commissioning Manual

10.2.9

NCK utilization

Introduction
You can view utilization of system resources for the NCK on the HMI under the menu
"Diagnostics > Service displays > System resources".
Figure 10-2
The following machine data is taken into consideration for displayed runtimes (see Chapter
Cycle times (Page 113)):
● MD1061 POSCTRL_CYCLE_TIME = MD10050 SYSCLOCK_CYCLE_TIME (System
● MD1070 IPO_SYSCLOCK_TIME_RATIO (factor for interpolation cycle)
● MD1071 IPO_CYCLE_TIME (interpolation cycle)
What will be displayed?
In the display of the "System resources" menu, the values have the following meaning:
● Area "Nett runtime (purely CPU time)":
● Area "Gross runtime (time from start to end)":
● Line "NCU load by position controller and interpolator":
IBN CNC: NCK, PLC, drive
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
NC utilization
basic cycle)
Active times (current, minimum and maximum) are displayed in the nett values.
The relation to the machine data can be seen from the displayed values.
The corresponding total utilization of the system (position controller + interpolator) is
displayed, based on the net values.
Note
The current, minimum and maximum utilization of the NCK is displayed.
In order to have sufficient reserves for program processing, maximum utilization in reset
condition when pressing the <Reset> key should be in the range of 60-65%.
NCK start-up
10.2 System data
117