CPU_LOAD¶
| Parameter | Value |
|---|---|
| Library_File_Name | Diag_AC500_V10.lib |
| Firmware | V1.0.2 |
| Type | Type_Function_Block_History |
| Group | - |
The Function Block CPU_LOAD outputs the CPU capacitiy utilization in [%].
The following is displayed:
current load
minimum load
maximum load
average (avg) load
The instance CPU of the Function Block CPU_LOAD is declared in the global variables list GL_AC500_Diagnosis. The integrated visualization of the Function Block accesses the variables of this instance.
In order to include the Function Block into an AC500 project, it is only necessary to call the Function Block instance. Example in ST:
CPU(EN := TRUE);
The values are entered as 0.01% values into the internal structure strVisuData of the type strCPU_LOAD in the instance CPU of the Function Block CPU_LOAD. To obtain the values in [%], they have to be divided by 100. The structure is composed as follows:
| TYPE strCPU_LOAD : | |||
| STRUCT | |||
| Current | : WORD; | (* current value *) | |
| Avg | : WORD; | (* average value *) | |
| Minimum | : WORD; | (* minimum value *) | |
| Maximum | : WORD; | (* maximum value *) | |
| Counter | : DWORD; | (* counter *) | |
| Conf | : WORD; | (* bit 0 = 1 (1) –> Update CPU_load *) | |
| (* bit 1 = 1 (2) –> Heap check *) | |||
| END_STRUCT | |||
| END_TYPE | |||
If the user program should have access to these values, this is done as follows:
CPU.strVisuData.Variable.
In the following example, the value of the current CPU load is read and assigned to the variable wCurrentCPULoad:
Using the visualization Visu_CPU_Load, the values are represented graphically Visualizations.
The same values can also be polled using the PLC browser command “cpuload”.