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M800 Does Not Communicate with MDC

 
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anthony_hk2001



Joined: 14 Feb 2011
Posts: 8

PostPosted: Thu Mar 22, 2012 4:43 am    Post subject: M800 Does Not Communicate with MDC Reply with quote

The M800 does not communicate with the MDC at all,
not getting data from MDC, nor getting Eff point from M800.

I have connected the MDC to the M800 in a CAN network
And inputs are set with ECU2.
CAN communication is set with CAN1 - M800 ECU Receive.

I also tried connecting the RS232 from the OEM hardness to the M800 ECU,
still does not get the data.

Can anyone help me figure this out?
Note: I can read data from MDC manager.

Thanks,
Best Regards,
Anthony
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nfn15037



Joined: 22 Dec 2005
Posts: 271
Location: New England

PostPosted: Fri Mar 23, 2012 1:45 pm    Post subject: Reply with quote

Is another CAN device transmitting at the same address as your data set going to the MDC? If you can connect to the MDC and the ECU, both via CAN bus, then CAN comms is working. Is the CAN speed the same on both devices?
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anthony_hk2001



Joined: 14 Feb 2011
Posts: 8

PostPosted: Sat Mar 24, 2012 8:13 pm    Post subject: Reply with quote

All I have on the CAN network is the M800 and the MDC.

I can connect to both devices with the same CAN connector using UTC.

However, they cannot be opened at the same time.

Besides CAN, the MDC should communicate with the M800 through a half-duplex RS232.

I have the RS232 connected correctly through Tx, Rx, and 0v comm.

Then I tried connecting the Tx and Rx together (half-duplex so maybe running on the same wire).

And still does not work so I jumped directly from MDC to M800.

After that I was thinking if the MDC only run RS232 with M800 OEM PnP ECU, then that brought me back to think about CAN again.

Those are all the possible ways that I can think of.

Hope this story will help understanding my situation.

Thanks.
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anthony_hk2001



Joined: 14 Feb 2011
Posts: 8

PostPosted: Tue Mar 27, 2012 8:46 pm    Post subject: Reply with quote

Problem solved by Motec Engineer, thanks guys.
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nfn15037



Joined: 22 Dec 2005
Posts: 271
Location: New England

PostPosted: Wed Mar 28, 2012 2:16 pm    Post subject: Reply with quote

What was the problem? Sometimes posting the answer can be helpful to people in the future who might have the same one.
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