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Program ‎PLC_PRG‎

PROGRAM PLC_PRG
VAR
	iVar : INT;
	rSin : REAL;
	rVar : REAL;
END_VAR

iVar := iVar + 1;
iVar := iVar MOD 33;

rVar := rVar + 0.1;
rSin := 30 * SIN(rVar);

Requirement: The application is running the ‎PLC_PRG‎ program on the controller.

  1. In the device tree, select the application and add a new trace object by clicking “Project  Add Object”.

    The respective trace editor opens with the commands available in the “Trace” menu.

  2. Click “Trace  Configuration”.

    The “Trace Configuration” dialog box opens.

  3. Select a task for running the trace feature. Normally this is the same task that is running in PLC_PRG.

  4. Click “Add Variable” to add an entry to the tree view of the trace configuration and assign an IEC variable (for example, ‎PLC_PRG.rSin‎).

  5. Click “Trace  Download Trace”.

    CODESYS loads the trace configuration to the controller. The application starts recording data and transmits the data to CODESYS, where it is displayed in the trace diagram as a graph. Commands are provided for navigating through the samples and controlling the data recording.

Example

Trace the sine-shaped data of the IEC variable ‎PLC_PRG.rSin‎

The ‎PLC_PRG‎ program is running on the controller. When you follow the instructions for "Getting Started", CODESYS displays the following trace diagram.

_cds_img_trace_first_steps

  • (1) : “Configuration”

  • (2) : “Add Variable”