Technical data

Download, testing and diagnostics
CPU 317T: Technology Functions
A5E00251798-03
8-9
8.5 Checking the load on integrated technology
Typical memory requirements of technology objects and cam disk interpolation
points are described in the "CPU Data" documentation of your Technology CPU.
Determine the approximate percentile value of memory utilization based on the
values described in this documentation. This approximate value should not exceed
90%.
You can check the current memory load in S7T Config.
Checking the load on integrated technology
How to check load on integrated technology.
1. Download all technology objects required to the Technology CPU.
Verify that the cam disks contain all interpolation points required. When
changing cam disks dynamically in runtime using the "MC_CamClear",
"MC_CamSectorAdd" and "MC_CamInterpolate" technology functions, use
these functions to create the interpolation points.
2. Change to "Online" mode in S7T Config.
3. In S7T Config, select the Target system > Device diagnostics command.
The "Device diagnostics" dialog box opens.
4. Select the "System load" tab.
This tab shows the current memory load and the "CPU load due to system tasks" in
the integrated technology. The output value should not exceed 90%.
"CPU load due to system tasks" shows the load on integrated technology caused
by the position control and the interpolator cycles (ipo and ipo2) as a percentage
(for example, 40%.) The remaining time slice (60%, for example) is available for
technology DB updates and command processing.
You can modify CPU load by adjusting the system cycles:
• Shorter system cycles allow faster control, but reduce the time slice for
command processing. Technology DB updates may require a longer cycle.
• Longer system cycles, on the other hand, provide more computing time for
command processing and technology DB updates. This reduces control
performance.
The value of "CPU load due to system tasks" should normally lie between 40% and
60%.