Synchronization in the messaging queue manager

Hi all

I have a program of Messaging Manager similar to the model for measuring continuously and logging (CML) queued.  Events on the front panel creating a message from queue UI"who receives the interface user Messenger Handler.  The Messenger user interface handler then sends a message to queue data"to my vi data loop.  (It is similar to the acquisition loop in the model of the CMA).

The loop of data vi is intended to read messages sent priority from the interface user Messenger Handler, such as start, stop, terminate. When he reads the startup message, he enters with the case of boot and continually performs a task once every milliseconds X.  When sending a priority stop message, it should immediately cease to perform the tasks.

I think it should involve the data loop continuously sending messages to perform the task.  In this way the priority message could easily slide forward and stops the process.  Is that a correct implementation?  If so, how can ensure me that the task is done at the right time?

Thank you!

Just to restate what Bob says...

The time-out period is as your source of synchronization.  So, if no message has been received within the given time (negative expectations are infinite wait), then the queue returns the default value for the type of data (e.g. empty string to a string data type) and the release of "Timedout?" is set to TRUE.  You can detect this and perform any action you want your intervaled rate.

The beauty of this Setup is that if something happened to you can handle immediately.

Tags: NI Software

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