PLC Programming

Debugging, Online Functions...
Monitoring
In Online mode, all displayable variables are read from the controller and displayed in real time. You
will find this display in the declarations and program editor; you can also read out current values of
variables in the watch and receipt manager and in a visualization. If variables from instances of
function blocks are to be monitored, the corresponding instance must first be opened.
In monitoring VAR_IN_OUT variables, the de-referenced value is output.
In monitoring pointers, both the pointer and the de-referenced value are output in the declaration
portion. In the program portion, only the pointer is output:
+ --pointervar = ''
POINTERs in the de-referenced value are also displayed accordingly. With a simple click on the cross
or a double-click on the line, the display is either expanded or truncated.
Example for Monitoring of Pointers
In the implementations, the value of the pointer is displayed. For de-referencing, however, the dereferenced
value is displayed.
Monitoring of ARRAY components: In addition to array components indexed by a constant,
components are also displayed which are indexed by a variable:
anarray[1] = 5
anarray[i] = 1
If the index consists of an expression (e.g. [i+j] or [i+1]), the component can not be displayed.
2-24 CoDeSys V2.3