CAN Data not receiving on NI-CAN BusMonitor

[Dushy@11]

I have "NI USB-8473s High Speed CAN" together with "CAN Breakout Box". I am trying to establish a communication but i am not getting the CAN Data on "NI-CAN BusMonitor" tool. Although i am recieving a voltage of around 40 millivolt at my CAN_H & CAN_L Pins of DB9 Connector of USB-8473s.

Pls help me out in recieving the data at  "NI-CAN BusMonitor" tool.

Thanks in Advance

[dkfire]

And what data are you missing?

What device should send out data on the CAN bus?

How have you connected the device to the CAN bus, and how is the NI USB-8473 dongle connected to the CAN bus?

[Dushy@11]

I am not recieving any data on NI-CAN BusMonitor.

The Device which is sending data is an embedded PCB board and it is working fine when testing in MASTER & SLAVE configuration within multiple boards. But when i am taking the CAN_H & CAN_L Signals from the specied pins of PCB BOARD and connecting to my CAN Breakout Box (which is powered on by 24VDC Supply) which is then connected to my USB-8473s through DB9 connector and then USB-8473s to PC through USB, i am not getting any data on NI-CAN BusMonitor.

But when i am checking the volatge signal at DB9 connector, it is showing around 40 Millivolts when CAN BUS is active.

My configuration:

PCB BOARD(transmitting CAN Data)----------CAN Breakout Box(termination at 120 Ohm)----------------------NI USB-8473s(connected to breakout box through DB9 Connector)-----------------PC(connected through USB)

Baud Rate - 1Mbits/s

Pls help me in locating where i am going wrong and how will i get CAN Data on NI-CAN BusMonitor.

Thanks

[Dushy@11]

Any CAN Protocol Expert,Pls help me out.

[hmarcano]

Can you post the code(VI) so that we can better help you?

[Dushy@11]

Before developing any code, I am checking it in the tool NI-CAN BusMonitor provided by NI in NI MAX.

Their i am not recieving any data from CANBUS.

Pls suggest what could be the possible reasons for not getting any data in NI-CAN BusMonitor, so that i can configure the setup same way.

[dkfire]

Are the device just sending CAN data on the bus by it self, or should you send a CAN message to it before it starts sending?

This all depends on the protocol that the device is using.

And one more question, what is the Master & Slave thing that you talk about?

[Dushy@11]

The Device is sending data by itself.

Actually i have developed a setup with multiple CAN nodes in it. So i am transmitting data from one node which i m referring as MASTER and all the other nodes recieving the data is referred as SLAVE. So in that process, i am tapping the CAN data and giving it to Breakout Box and then to NI USB-8473s and looking at NI-CAN BusMonitor.  

[dkfire]

Is there any other program that you can use to verify that there is CAN data on the bus?

[Dushy@11]

Yes the data is verified on Texas Instruments CCS Tool that it is CAN Data.