Streamit Lisa Compact, Руководство пользователя

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Lisa Compact 51
12.2 Multiple tasks at the same time
Tasks should not be planned for execution at the same time.
In some cases this is hard to avoid, for example with repeating commercials. Consider the following
situation:
Start Repeat Executes at
Commercial A 10:00 Every 15 minutes 10:00 10:15 10:30 10:45 11:00 11:15 11:30 11:45 12:00 ...
Commercial B 11:00 Every hour 11:00 12:00 ...
To address this situation, tasks that are planned for execution at the same time, will be executed
consecutively. This has the following consequences:
·
Commercials planned for execution at the same are all played, back-to-back
·
Because tasks can interrupt each other , task execution for other cases is nearly impossible to predict
and should be avoided
12.3 Handling task execution failure
Failure due to power problems
Power may fail, which is handled in the following way: If the last task was playlist update or playing a
playlist, this task will be initiated again without considering the time-stamp.
Failure due to other problems
Tasks may also fail due to a failing internet connection or due to an announcement that was playing at
the (intended) time of task execution. When the following tasks cannot be executed, they are
rescheduled to start again after 5 minutes:
Task type Task Task Command
Schedule update Update schedule us
Content update Update playlists
Update playlists only (no tracks)
Update commercials and announcement tracks
Update commercial plans up
uo
uca
ucp
Rescheduled tasks will be canceled when another schedule task is started or when the Lisa resets.