Controlling NI2568 Switches using VB6 and DAQmx

[Have GUI will travel]

Can the NI-2568 (and similar) switches be controlled using VB6 and DAQmx?

I got the impression from the "NI-DAQmx C API VIsual Basic 6.0" Help, that by using the "Digital Output API ",  it could be done very similarly to opening/closing a discrete , but no samples were included.

I just need to close a few relays and don't know if I have to install the "NI-Switch" software or not.

If it can be done, what would be the channel string to pass to the DAQmxCreateDOChan dll function

(in place of "Dev<x>/Port<y>/Line<z>").  MAX shows my (simulated-don't have the hardware yet) switch device to be "PXI1Slot3" .

Thanks,

Jon 

[kalyanramuv]

Hello Jon,

You would need NI-SWITCH to control PXI-2568. You can download it from

http://digital.ni.com/softlib.nsf/websearch/8AFA32F51AAE6B30862570A7007CFFC6?opendocument&node=13206...

NI-SWITCH installation comes with VB 6 examples. Also, Switch Soft Front Panel can be used to easily control PXI-2568.

[kalyanramuv]

Hi Jon,

You can also use NI-DAQmx Switch functions to control PXI-2568 rather using NI-SWITCH (NI-SWITCH installs ready-made VB examples)

You can use functions such as

DAQmxSwitchSetTopologyAndReset, DAQmxSwitchCloseRelays, DAQmxSwitchOpenRelays to control individual relays in PXI-2568. ANSI C Examples for DAQmx switches can be found at C:\Program Files\National Instruments\NI-DAQ\Examples\DAQmx ANSI C\Switches. This can be used to write VB 6 code. Refer to  using "C Examples to create VB 6.0 Applications" in C:\Program Files\National Instruments\NI-DAQ\Docs\cvb60daqmx.chm for help on converting C examples to VB 6.0.