PLC Programming

Watch and Receipt Manager...
The scaling of the chart (microseconds per Pixel) can be adjusted by the aid of a selection list at
Scaling [µs/Pixel].
Additional online functions in the context menu resp. in the 'Extras' menu:
Task Configuration'Extras' 'Set Debug Task'
For targets with preemptive multitasking this command is available to define a debugging task in
Online mode in the Task Configuration. The text [DEBUG] will appear after the set task.
The debugging capabilities then will apply only to this task. In other words, the program only stops at a
breakpoint if the program is gone through by the set task.
Task Configuration t'Extras' 'Enable / disable task'
With this command the task which is currently marked in the task configuration can be disabled or reenabled.
A disabled task will not be regarded during processing of the program. In the configuration tree it
will be indicated by a greyed entry.
'Extras' 'Callstack'
If the program is stopped at a breakpoint during debugging, then this command can be used to show
the callstack of the corresponding POU. For this purpose the debug task must be selected in the task
configuration tree of. The window 'Callstack of task ' will open. There you get the name of
the POU and the breakpoint position (e.g. "prog_x (2)" for line 2 of POU prog_x) . Below the complete
call stack is shown in backward order. If you press button 'Go To', the focus will jump to that position
in the POU which is currently marked in the callstack.
6.8 Watch and Receipt Manager...
With the help of the Watch and Receipt Manager you can view the values of selected variables. The
Watch and Receipt Manager also makes it possible to preset the variables with definite values and
transfer them as a group to the PLC ('Write Receipt'). In the same way, current PLC values can be
read into and stored in the Watch and Receipt Manager ('Read Receipt'). These functions are helpful,
for example, for setting and entering of control parameters.
All watch lists created ('Insert' 'New Watch List') are indicated in the left column of the Watch and
Receipt Manager. These lists can be selected with a mouse click or an arrow key. In the right area of
the Watch and Receipt Manager the variables applicable at any given time are indicated.
In order to work with the Watch and Receipt Manager, open the object for the
Manager in the Resources register card in the Object Organizer.
Watch and Receipt
Watch and Receipt Manager in the Offline Mode
In Offline Mode, you can create several watch lists in the Watch and Receipt Manager using the
'Insert' 'New Watch List'.
For inputting the variables to be watched, you can call up a list of all variables with the Input Assistant,
or you can enter the variables with the keyboard, according to the following notation:
.
With global variables, the POU Name is left out. You begin with a point. The variable name can, once
again, contain multiple levels. Addresses can be entered directly.
Example of a multiple-level variable:
PLC_PRG.Instance1.Instance2.Structure.Componentname
Example of a global variable:
.global1.component1
6-40 CoDeSys V2.3