X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 64 [XX] (50%) URL: contains host with port number (50%) BODY: contains "rx" Return-Path: Received: from smtpclma01.spirittelecom.com ([165.166.142.52] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTPS id 2054297 for flyrotary@lancaironline.net; Sat, 19 May 2007 21:55:27 -0400 Received-SPF: pass receiver=logan.com; client-ip=165.166.142.52; envelope-from=jewen@comporium.net Received: from webmail2.comporium.net (webmailrh04.infoave.net [165.166.0.86]) by smtpclma01.spirittelecom.com (8.13.6/8.13.1) with ESMTP id l4K1sojE028898 for ; Sun, 20 May 2007 01:54:50 GMT Received: from 165.166.0.80 (SquirrelMail authenticated user jewen) by webmail2.comporium.net with HTTP; Sat, 19 May 2007 21:54:32 -0400 (EDT) Message-ID: <49969.165.166.0.80.1179626072.squirrel@webmail2.comporium.net> In-Reply-To: References: Date: Sat, 19 May 2007 21:54:32 -0400 (EDT) Subject: Re: [FlyRotary] Re: Frustration. The seriesl.... From: jewen@comporium.net To: "Rotary motors in aircraft" User-Agent: SquirrelMail/1.5.1 MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Report-Abuse-To: abuse@spirittelecom.com X-Provider: WebMail2 X-Provider-URI: http://www.spirittelecom.com X-Virus-Scanned: ClamAV 0.88/3270/Sat May 19 14:19:58 2007 on smtpclma01.spirittelecom.com X-Virus-Status: Clean 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/ >> Archive and UnSub: http://mail.lancaironline.net:81/lists/ >> flyrotary/List.html > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > >