Host - Real Time Communication with Cluster

[B.Buerkert]

Hello,

i want to get and set different states from my host system to my rt system and visa versa.

For that i clustered all relevant states as boolean elements in a cluster.

E.g.  Host set the Flag "Get Data" to true; RT reads the flag, aquire data and set another flag "Data Ready" to true an

set the "Get data" to false". Its like a kind of handshake.

Whats the best way to realize that?

I tried with network variable, reading the cluster from the host was no problem, but i didnt know how to write/set the

flags during the  runtime of my RT.

Thanks in forward 🙂

[Jarek]

I usually use pure TCP/IP for the communication between Host and RT system. Take a look at STM library (Simple TCP Messaging). Using network variables might be easier but TCP/IP is more scalable.

[B.Buerkert]

Hy,

well there is only one RT and one Host System so it would be good if i can do that with the normal LV network variable.

Is there no possibility to read/write elements of the network variable (contains Flag Cluster) in different processes/tasks

(DMA readout; decoding signal,...).

🙂

[Jarek]

If I remember correctly there should be no problem to write to the shared variable on the RT target. Is it set as Read/Write? You can check the status with NI Distributed System Manager.