Lenze PLC Designer PLC Designer (R3-1) - Manual (Page 780)

L-force | PLC Designer
General Editors
778 DMS 4.1 EN 03/2011 TD29
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13.16.3 Task Editor in online mode
Which task is being processed?
For the execution of the tasks defined in the Task Configuration the following rules
apply:
• That task is executed, whose condition has been met; that is, if its specified time
has expired, or after its condition (event) variable exhibits a rising edge.
• If several tasks have a valid requirement, then the task with the highest priority
will be executed.
• If several tasks have valid conditions and equivalent priorities, then the task that
has had the longest waiting time will be executed first.
• The processing of the program calls will be done according to their order (top
down) in the task editor. If a program is called which with the same name is
available assigned to the application in the device tree as well as in a library or
project-globally in the POUs window, that one directly assigned to the application
will be executed.
Monitor, Online view of the Task Editor
When the top node in the Task Configuration tree is selected, besides the Properties
dialog on a further tab the 'Monitoring' dialog is available. In online mode it shows the
status and some current statistics on the cycles and cycle times are displayed in a table
view. The update interval for the values is the same as used for the monitoring of PLC
values.
Abb. 424 Task Configuration, Monitoring