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From: Bulent Aliev <atlasyts@bellsouth.net>
Subject: Re: [FlyRotary] Re: Frustration. The seriesl....
Date: Sat, 19 May 2007 23:12:42 -0400
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>

Joe, i tried bypassing the grounds directly. Will go over the grounds  
agein?
Thanks all for the suggestions.
Buly
On May 19, 2007, at 9:54 PM, jewen@comporium.net wrote:

> Buly,
> I would add one thing to Al's info on the NOP.  There are three wires
> required for the serial communications, one is RX, one is TX these  
> would
> be the 2 refered to as serial commumications.  The third wire  
> (electron
> flow path) is ground.  Lack of a common ground between the 2 units  
> would
> prevent communications.  Also a high resistance ground would hamper  
> comms
> (communication level is TTL or <5V.)  Noise into that ground lead  
> may also
> corupt the data stream resulting in invadild data or failure of a  
> checksum
> (if the EM2 uses a checksum.)  I do not have an EM2, but have set up
> serial comms from the EC2 to my on board computer.
>
> A ground problem would also explain why the injectors do not fire.   
> The
> injector triggers are sinking, which means when on the driver  
> connects the
> injector wiring to ground to complete the circuit.  If a poor  
> ground path
> exists it may not be enough to support the current load from the
> injectors.
>
> Joe
>
>
> On Sat, May 19, 2007 7:47 pm, Bulent Aliev wrote:
>> Al,
>> I have two EC2's. Bob White sent me his to test against mine. The NOP
>> is flashing on both and A/B processors too. I have power to pins  
>> 33 and 34.
>>  Spark plug / ignition test on Mode 8 works fine.
>> 2 Serial leads have connectivity between EC and EM.
>> Since I have a second EC to swap, the EC is not a suspect.
>> During the Tracy's update I replaced the single wires to the
>> injectors with two pairs of shielded 18 gauge I got at S&F. I started
>> suspecting the wire, since it has one blue and one white wire  
>> inside. The
>> number on the wire is: 2112/202SJ-18 1F2Y2. I thought it may be a  
>> some
>> kind of resistor wire? But we tested resistance, and checked fine?  
>> Thanks
>> Al. Looks like I need dumb luck to get out of this one :)
>> Buly
>>
>>
>> On May 19, 2007, at 8:29 PM, Al Gietzen wrote:
>>
>>
>>> Buly;
>>>
>>>
>>> Two things:  Have you checked that the processor chip(s) are fully
>>> seated in plug (base); and -  is the behavior the same for both
>>> controllers?
>>>
>>> If you have +12 power to pins 33 or 34, and you have the serial lead
>>> connected to the EM2, and the processor in functioning, you  
>>> should not
>>> see NOP.  Possibly something has happened in shipping or  
>>> handling.  If
>>> the processor is not functioning of course you can not trigger the
>>> injectors.
>>>
>>> Good luck,
>>>
>>>
>>> Al
>>>
>>>
>>>
>>> --
>>> Homepage:  http://www.flyrotary.com/
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>>> flyrotary/List.html
>>
>>
>> --
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>>
>>
>
>
>
> --
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