Single Wire CAN cDAQ

[Hooovahh]

I have would like to use cDAQ for a set of testers that will be built.  These testers need to talk to various hardware and I wanted it to be flexible so I choose cDAQ because modules can be swapped out for I/O that is needed.  I saw that high speed CAN, low speed CAN, and even LIN is available in a cDAQ form factor, but single-wire CAN is not.

Is there an option for a single-wire CAN cDAQ module that I am not finding?  Why would NI not support a single-wire CAN interface on cDAQ when they do on PXI/PCI?

[Deagle]

Hooovahh,

Although we have the NI 9861 and NI 9862 for high and low speed CAN communication, it doesn't look like we have software-selectable CAN devices in the C-Series form factor. I'll double-check this information and let you know if I find anything.

Thanks,

[Hooovahh]

Thanks for the information.  If this is the case then again I ask my follow up (that I think you are looking into) which is what option do I have for Single Wire CAN on cDAQ?  And why NI would choose to not offer it in the cDAQ form factor.

[Deagle]

Hooovahh

We are continuously looking into the needs of the market, and evaluating what products to invest development time in. Unfortunately, I cannot speak to whether or not we will release a single-wire CAN C-Series module. At the moment I recommend looking into the PCI-8513, as it contains a single-wire CAN transceiver.

NI PCI-8513: 1-Port Software-Selectable NI-XNET CAN Interface, PCI

[Hooovahh]

I'm fully aware of the fact that this is single wire CAN is available in PCI/PXI form factor and mentioned it in my first post.

[Hooovahh]

Our solution if anyone else is looking to do the same is to use an Intrepid neoECU hardware, which is a scriptable device with high speed/single wire CAN, LIN, and general purpose I/O.  It comes with some examples and one of them is a CAN gateway to convert high speed CAN messages to single wire CAN and backward.

We have this little device sit between a cDAQ high speed CAN device (NI 9862) and a signle wire CAN hardware to test.  We talk high speed CAN over 9862 and the neoECU sends out single wire CAN.  Obviously there are limits because the baud rate for high speed CAN is higher and you can over load the single wire bus, but if you just are aware, or setup filters on the neoECU it works fine.

This device can also be used as a LIN gatway as well sending LIN data back on high speed CAN but we haven't tested that part yet.  One downside is to program the deice you need to have a license of Vehicle Spy which is Intrpids CAN software.  It does have a trial and that maybe all you need.