From: "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] RWS EC backup crank sensor
Date: Thu, 8 Oct 2020 06:24:01 +0800
References: <list-814444@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-814444@logan.com>
Message-Id: <0AC27E30-4D37-44FC-8283-BE2DDFEA4CA1@gmail.com>

Hi Finn

Concur with your thinking and understanding.
It was a fixed code option for an earlier code version of the EC2 that =
you requested from Tracy.
I did begin years ago to read the assembler code and gave up. My =
knowledge of the coding is just not high enough.
So I=E2=80=99m in the dark when it comes to whats actually happening =
with my current code and BUSENSOR. Its all there in hardware from engine =
to EC2 processors but in the code?

Cheers

Steve


> On 8 Oct 2020, at 1:24 am, Finn Lassen finn.lassen@verizon.net =
<flyrotary@lancaironline.net> wrote:
>=20
> Yes, that does appear to be a software option. But maybe not for all =
engine types. =20
>=20
> Looking at the A8 engine type (Renesis) EC3 manual, Mode 5 is used to =
chose narrowband or wideband O2 sensor. In program it appears to =
set/reset BUSENSOR bit, but I guess only for engine types that support =
it of which A8 doesn't. :(
>=20
> Steve, do you use Mode 5 to toggle BUSENSOR on the EC2?
>=20
> Hardware is definitely there. J2 pin 6. Both controllers do have =
inputs for both primary and backup CAS sensors.
>  (Sensor as to be mounted 90 degrees before primary CAS -- some say =
180 degrees -- actually depends on engine type.)
>=20
> But I'm very unclear on how the software works. Hope to ask Tracy when =
he's back.
>=20
> If the primary pickup has failed when starting, how would the software =
know that and use the backup?
>=20
> Unless the B controller always use the backup sensor (when the =
BUSENSOR software option is enabled). This is what I see from looking at =
the program.
> =20
> If would appear that to make backup sensor work for EC3 and Renesis =
some program changes need to be made. Perhaps Mode 4 to set/reset the =
option -- if you'll want it to be user selectable.
>=20
> Unfortunate above my knowledge of the EC3 software at this point.
>=20
> Finn
>=20
> On 10/7/2020 12:38 PM, argoldman@aol.com wrote:
>> Does the ec-3 have the capability for additional sensor?
>>=20
>> thanks Rich
>>=20
>>=20
>> -----Original Message-----
>> From: Stephen Izett stephen.izett@gmail.com =
<flyrotary@lancaironline.net>
>> To: Rotary motors in aircraft <flyrotary@lancaironline.net>
>> Sent: Sun, Oct 4, 2020 5:29 pm
>> Subject: [FlyRotary] Re: RWS EC backup crank sensor
>>=20
>> Hi all
>>=20
>> I=E2=80=99m pretty sure I programmed my EC2 for and had the backup =
sensor functioning but it was years ago and I know with my current setup =
the backup sensor is disconnected.
>> The backup sensor in 90deg out of phase. So looking at the front of =
the engine its at ~3 o=E2=80=99clock as Dave says.
>>=20
>> Note:
>> We had an all electronic ignition Glasair 3 IO470 go down due to a =
belt failure taking out the electronic ignition CAS.
>> I put a stainless steel wire in the harness of the CAS=E2=80=99s to =
protect against this single point of failure.
>>=20
>> Cheers
>> Steve Izett
>>=20
>> > On 5 Oct 2020, at 4:45 am, DAVID BARKER david_barker@msn.com =
<flyrotary@lancaironline.net> wrote:
>> >=20
>> > Dear Finn,
>> > Sensor at 6:00 0=E2=80=99clock is primary. Sensor at 3 o=E2=80=99cloc=
k is backup.
>> > If you cannot locate appropriate software, I can reconfigure the =
sensor physical locations if necessary.
>> > Dave Barker
>> >=20
>> > Sent from my iPad
>> >=20
>> >> On Oct 4, 2020, at 12:40 PM, Finn Lassen finn.lassen@verizon.net =
<flyrotary@lancaironline.net> wrote:
>> >>=20
>> >> =EF=BB=BF
>> >> Thanks Bobby
>> >>=20
>> >> In some of the manuals I've see 90 degrees before the primary, but =
in the code I looked at I think it mentioned 180 degrees.
>> >>=20
>> >> So, I'll have to look further. It sure will be interesting to find =
out how it determines if primary sensor has failed. Wonder what happens =
when  backup sensor fails and primary is OK. With no other inputs, I =
don't see how it can work.
>> >>=20
>> >> Finn
>> >>=20
>> >> On 10/4/2020 3:20 PM, Bobby J. Hughes bhughes@qnsi.net wrote:
>> >>> Finn,
>> >>>=20
>> >>> Both processors see both signals on pins 36&37.  I think the =
second sensor must be mounted 180 degrees opposite the main.=20
>> >>>=20
>> >>> Bobby
>> >>>=20
>> >>> Sent from my iPad
>> >>>=20
>> >>>> On Oct 4, 2020, at 9:48 AM, Finn Lassen finn.lassen@verizon.net =
<flyrotary@lancaironline.net> wrote:
>> >>>>=20
>> >>>> =EF=BB=BFDoes anyone have an RWS EC running with backup sensor?
>> >>>>=20
>> >>>> Yesterday I briefly looked at the EC code (program) and it =
appears that=20
>> >>>> when you have a backup sensor controller A uses main sensor and=20=

>> >>>> controller B uses the backup sensor; is that correct?
>> >>>>=20
>> >>>> Or is there some automatic detection of main sensor failure that =
causes=20
>> >>>> a switch-over to the backup sensor for both A and B, that I =
missed?
>> >>>>=20
>> >>>> Finn
>> >>>>=20
>> >>>>=20
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