Instructions

Circuit program development
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The online debugging is possible only if:
 the device is connected to the PC
 the program in the device and the program opened in ALP is the same
 the version of the device firmware is compatible with the current version of ALP
The online debugging is only available for the main program workspace, not within mac-
ros.
It is not possible to make changes in the project during online debugging. Exit online de-
bugging by clicking the icon once more if you want to modify the project.
Note: If communication with the device is lost, online debugging is terminated after 10
seconds and the device is switched to operating mode. If the connection is restored within
10 seconds, online debugging continues, but the entered values are reset.
Manual value entry
It is possible to change the variable input value during online debugging by clicking on the
displayed value (Fig. 7.34). The new value should be entered in the field New value in
the opened window Prepared value. There are two options to change the value: one-off
or permanent change.
The one-off change enables to change the variable input value for one program cycle. In
the subsequent cycles, the signal from one of the device inputs or the output of another
program component connected to this input is used. The option is useful for single pulse
simulation.
When using the option Permanent change, the entered value is applied to the input until
the option is unchecked or the online debugging is stopped. The option is useful for simu-
lation of time-constant signals.
Fig. 7.37
Note: Data exchange in online debugging mode is limited, and the limit depends on the
device model. A sign that the restriction is triggered are empty value cells in the diagram
during online debugging. In this case you should increase the scale of the workspace
(see 2.3) so that fewer values fall into the visible area. The entered values that do not fall
into the visible area remain saved, but do not occupy the memory area allocated for the
data exchange.