Java-to-Analog IO, with minimized technology diversity

[Svanto]

Hi, dear experts,


The task:
Read/write some analog IO (current controls, thermocouples,  etc., 0-24V stuff),
and control these values from a Java application.



The Problem:
No 2nd program language (like C++ (in JNI), VB, LabView).
(general: No further expert technology.)



solution ideas for NI equipment, so far:

- hardware: PCI DAC cards in PC:
If there is a Java library for controlling build-in PCI DAC cards,
everything is fine. Does such a library exist?

- hardware: PXI chassis with DAC cards:
Can I connect to the PXI over a TCP protocol, by which I can
control the analog IO on the DAC cards?

( eg. something like:
send (to RXI chassis):  "read module2 input7"
receive: "4.25V" )



I appreciate all ideas,
Thank you!
Svanto

[Jochen]

Svanto,

here you can find some information how to use NI drivers with JAVA.

The NI-DAQmx driver provides an OPC interface. For single-point read/write operations you can use this interface to communicate with the NI DAQ devices in your PXI system over the network. Please refer to this link for more information. Please don't get irritated because of the references to LabVIEW in this article. The OPC server will work even without LabVIEW installed.

Best regards,

Jochen Klier
National Instruments Germany

[Jochen]

Message Edited by Jochen on 06-19-2006 10:17 AM

[Svanto]

Thanks for the answer.