From: "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] EC2/3 Autotune
Date: Fri, 5 Jun 2020 13:33:45 +0800
References: <list-335944@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-335944@logan.com>
Message-Id: <C3564900-10D6-4C1D-BC06-8E8D3BEF3193@gmail.com>

Hi Guys

It turns out my EC2 has mode #5 and Autotune.
I set the O2 sensor to Wideband and conformed from the EM3 datadump =
screen.
Then set a target O2 point with Mode 0 before entering mode #1 & CS and =
the EC2 was able to trim back to the target 1.00 Lambda.
I then entered Mode#3 & CS and could see it making adjustments to the =
Correction Tables.
Working on the tables it also became evident that it is the 8 table =
version like the EC3.
So the code that Tracy provided some years back that I used to reprogram =
with, must be a version very similar to the current EC3 code.

Good news from my perspective. It=E2=80=99s nice to have a win.

Cheers

Steve


> On 5 Jun 2020, at 7:23 am, Stephen Izett stephen.izett@gmail.com =
<flyrotary@lancaironline.net> wrote:
>=20
> Hi Finn and all.
>=20
> As the years have gone by its hard to remember various things but:
> 1. The EC2  .asm file (Actual EC2 Controller code - for non coders) =
that I think I reprogrammed my EC2 with years ago is called EC2CL8.asm
> The CL is a hint me thinks.=20
> 2. I have a recollection that I had the mode#1 autotune function (not =
the original EM3 capability) working years ago ie. manually causing =
mixture rich, and EC would trim it back.
>=20
> I=E2=80=99m headed for the hangar this morning so I=E2=80=99ll:
> 1. First I=E2=80=99ll try using mode#5 to change the O2 setting and =
see if my software version has this capability. I have both narrow and =
wideband sensors.
> 	I think when I last tried the autotune feature I had the =
wideband connected but the data dump confirms its setup for a narrowband =
sensor.
> 2. If it does change in the Data Dump Screen - Row 1 Col 2 changing to =
16h (currently 12h) then I=E2=80=99ll then try out the autotune again.
> 3. I=E2=80=99d like to know which version of the code its using and =
how the mixture table is divided. Is it the 8 table version?
> 	General mixture settings are sort off OK at the moment for TO =
and cruise, but when we pull power and point her=20
> 	at the ground she goes way lean and outside of the manual =
mixtures controls ability to correct.
>=20
> For any non-coders that want to understand what we are talking about =
here:
> The Datadump screen presents the data in Hexadecimal not Decimal.=20
> We can represent numbers using various number systems. We tend to see =
the world through the Decimal number system (Oh that the US had adopted =
it fully!!!!)
> In decimal each digit of a number can be 0-9 (ten states - therefore =
called DECimal)=20
> Because of the nature of how digital computers, that inherently are =
simply millions of switches that can be ON or OFF binary is the native =
language (two states - 0 OR 1)
> So my EC2=E2=80=99s (8-bit) ENG CODE  can visualised/represented as =
00010010 binary OR 18 decimal OR 12 hexadecimal=20
>=20
> But reading binary is much more difficult for our brains and we can =
process this so much faster represented by 2 Hex digits rather than 8 =
binary digits.
> - so each digit has the range 0-16 (16 states 0 1 2 3 4 5 6 7 8 9 A B =
C D E F)
>=20
> So my ENGCODE - 12h in DataDump Screen is -> 00010010 binary
> Binary is written from right to left)
>=20
>           Bit  0 - Non Turbo (0)
>=20
>            Bit 1 - Large Secondaries (1)
>=20
>            Bit  2 - Narrow Band O2 Sensor (0)
>=20
>            Bit 3 - Temp Sensor (0)
>=20
>            Bit 4 - Rotary (1)
>=20
>            Bit 5 - BUSensor (0)
>=20
>            Bit 6 - Cont
>=20
>            Bit 7 - CSON
>=20
> Hoping thats not unhelpful!
>=20
> Steve Izett
>=20
>=20
>=20
>=20
>=20
>> On 5 Jun 2020, at 2:33 am, Finn Lassen finn.lassen@verizon.net =
<flyrotary@lancaironline.net> wrote:
>>=20
>> To clarify, here is an excerpt from the EC3 manual:
>>=20
>> "CLOSED  LOOP MODES OF OPERATION.
>> NOTE!   As of  9-12-2012  the EC3 includes a BETA version of the =
software that enables 2 closed loop modes as described below.   DO NOT =
enable them in flight until you are certain they are working properly on =
the ground.   You should also follow the instructions for setting up =
Mode 3 and 1 BEFORE trying these Closed Loop modes of operation. =20
>>=20
>> Before attempting operation in Closed loop mode, Make sure you have =
selected the type of O2 sensor you are using for either Narrow Band or =
Wideband sensors.  See Mode 5 instructions for details on doing this.
>>=20
>> There are two closed loop modes.   When  Mode 1 is selected  with =
Cold Start switch ON the controller monitors the mixture and trims the =
injection to keep mixture close to the mixture point programmed in Mode =
0A  as long as the basic programming is within trim range which is =
pretty wide.    If this mode is working properly you should see the EC3 =
bring the mixture back to the set point after making a manual mixture =
control adjustment that would normally take it out of range.  If you =
can't verify this, do not try the auto program mode of closed loop (Mode =
3)
>>=20
>> The target for the closed loop modes is set in Mode 0A,  engine =
running, Mode 0 selected and cold start switch off.  With the engine =
running and warmed up, adjust the mixture control to the desired =
operating point by observing the mixture monitor.  If the monitor isn't =
working for any reason don't try to set this until it is.  When at the =
desired mixture, press the Store button.  The mixture target should now =
be set. =20
>>=20
>> The other closed loop mode (Mode 3 selected  with Cold Start switch =
ON) is the auto programming mode that adjusts the MAP table.  It  works =
the same way but uses a  narrow trim range and updates the map table if =
necessary to keep the mixture near the mixture point programmed in Mode  =
0A .   Since the loop is all internal to the EC3 it happens faster than =
the EM2/3 auto program mode in earlier versions and of course does not =
require the EM2/3 to work.   Should eliminate a lot of tuning headaches =
for some builders. Manual programming Modes 1 & 3 operate as described =
later in this manual with Cold Start switch off".
>>=20
>> Looks like for the stand-alone EC3 auto tune it must have the =
Closed-loop option.
>>=20
>> Does you EC2 have that?
>>=20
>> Finn=20
>>=20
>>=20
>> On 6/4/2020 1:58 PM, Todd Bartrim bartrim@gmail.com wrote:
>>> I also have the EC2 & EM2 with the autotune. It does work, but it =
only makes changes to the map table at the address that you are =
currently on due to your throttle position. Moving your throttle =
position to other addresses will result in gaps where it is hard to hit =
each address using the auto tune. At this point though you should have a =
decent base line to work with and you can just manually go through the =
table to make adjustments as it will be obvious which ones need to be =
adjusted. Then repeat as required.
>>> But as Andrew pointed out it uses a narrow-band O2 sensor, so it is =
not great. I have a PLX wide-band O2 sensor that also has a narrow-band =
output that feeds the input to the EM2. I can't say for sure but it did =
seem to give a more responsive signal to the EM2, which improved the =
auto tune. But as it also gives a very accurate and responsive wide-band =
output to it's own display, which is essential for fine tuning manually.
>>>=20
>>> Todd Bartrim
>>>=20
>>>=20
>>> On Thu, Jun 4, 2020 at 7:57 AM Andrew Martin andrew@martinag.com.au =
<flyrotary@lancaironline.net> wrote:
>>> I have 2007 EC2, EM2 has autotune feature, I just found it quicker =
to tune manually as its setup for narrowband o2 sensor, but used =
wideband.
>>> Andrew
>>>=20
>>> On Thu, 4 Jun 2020 at 10:14 pm, Finn Lassen finn.lassen@verizon.net =
<flyrotary@lancaironline.net> wrote:
>>> I doubt there's auto tune in the EC2, but what do I know?
>>>=20
>>> OK, looked in EC2 source code, last comment ;10-09-05 (Oct 2005), so =
I=20
>>> doubt it.
>>> There's also source code for EC2F, what ever that is. Latest comment=20=

>>> there is ;03-16-12
>>>=20
>>> No mention of auto tune in either.
>>>=20
>>> I could be wrong.
>>>=20
>>> Finn
>>>=20
>>> On 6/4/2020 9:01 AM, Stephen Izett stephen.izett@gmail.com wrote:
>>>> Hi Finn & all
>>>>=20
>>>> Can anyone using an EC2 confirm if the Autotune functions works for =
them?
>>>> Not the autotune built into the EM3 engine monitor, the EC2 =
version.
>>>>=20
>>>> Thanks
>>>>=20
>>>> Steve Izett
>>>>=20
>>>>> On 2 Jun 2020, at 10:10 pm, Stephen Izett stephen.izett@gmail.com =
<flyrotary@lancaironline.net> wrote:
>>>>>=20
>>>>> Hi Finn
>>>>>=20
>>>>> Thanks for the updated EC3 doc. I had an older version.
>>>>>=20
>>>>> Steve
>>>>>=20
>>>>>> On 2 Jun 2020, at 9:28 am, Finn Lassen finn.lassen@verizon.net =
<flyrotary@lancaironline.net> wrote:
>>>>>>=20
>>>>>> Yes, after putting the EC3 into injector test mode and checking =
that each is clicking (screwdriver as stethoscope) and into ignition =
test mode and see that all four plugs are firing, that would be my next =
step.
>>>>>>=20
>>>>>> You say you've already checked that the wiring to coils and =
injectors are correct:
>>>>>> J2-3 Prim Inj 1
>>>>>> J2-4 Sec Inj 1
>>>>>> ...
>>>>>> J2-10 Trail Coil 1
>>>>>> ...
>>>>>>=20
>>>>>> I continuously surprised myself on how often I'd wired something =
wrong, in spite of trying to be very careful about getting it right. I =
wasn't kidding about Murphy working overtime.
>>>>>> It's easy to get the pin numbering wrong on the connectors.
>>>>>>=20
>>>>>> If I were getting desperate, I would remove (one at a time) the =
connectors on the injectors and coils and check continuity from J2 pin =
to the connector pin.
>>>>>> (You know that the power side are correct because works with EC2)
>>>>>> Finn
>>>>>> Got the copper washers in the mail today, but think I'll wait for =
these:
>>>>>> https://www.ebay.com/itm/293592023854
>>>>>>=20
>>>>>> On 6/1/2020 7:30 PM, Stephen Izett stephen.izett@gmail.com wrote:
>>>>>>> Thanks Finn.
>>>>>>>=20
>>>>>>> I had a chance to unpack the dump last night and conquer with =
your reflection.
>>>>>>> I=E2=80=99m in the dark re the EC3. Checked wiring twice now.
>>>>>>> I must put a cro on the injectors and coils to confirm they are =
triggering correctly.
>>>>>>>=20
>>>>>>> Steve
>>>>>>>=20
>>>>>>>> On 1 Jun 2020, at 9:59 pm, Finn Lassen finn.lassen@verizon.net =
<flyrotary@lancaironline.net> wrote:
>>>>>>>>=20
>>>>>>>> Program Mode 5 (Reset function)
>>>>>>>>=20
>>>>>>>> As of 01-25-13 the EC3 can be used with either the common =
narrowband O2 sensors or the more advanced wideband sensor systems.   Be =
sure to verify that your wideband sensor outputs in the range of 0 - +5 =
volts if using a wideband type.  To select the type in use, use the =
power up program mode method below:
>>>>>>>>=20
>>>>>>>> To select the O2 sensor type , perform the following steps:
>>>>>>>>=20
>>>>>>>> 1.  Turn the EC3 power off.
>>>>>>>> 2.  Select mode 5 with the Mode Select switch
>>>>>>>> 3.  Select the O2 sensor type using the Cold Start switch:  Up =
=3D Wideband, Down =3D Narrowband
>>>>>>>> 4.  Press and hold the Program Store switch.
>>>>>>>> 5.  While holding down the Program Store switch, turn on the =
power switch to the EC3.
>>>>>>>> 6.  Keep holding the Program Store switch for about 1 second, =
and then release it.
>>>>>>>> 7.   Return the Mode Select switch to 0.
>>>>>>>> 8.   Power the EC3 off.   When the EC3 is powered up again it =
will be set for the O2 sensor type selected.
>>>>>>>>=20
>>>>>>>> Uploaded doc to:
>>>>>>>> =
https://drive.google.com/drive/folders/1mVzPOxUwcGUlPizxnRF40nUyKBzfT4DC?u=
sp=3Dsharing
>>>>>>>>=20
>>>>>>>> PDF version still states that B is automatically programmed =
when A is programmed. Not true. Use the Word doc.
>>>>>>>>=20
>>>>>>>> Finn
>>>>>>>>=20
>>>>>>>>=20
>>>>>>>> On 6/1/2020 9:16 AM, Stephen Izett stephen.izett@gmail.com =
wrote:
>>>>>>>>> Hi Finn
>>>>>>>>>=20
>>>>>>>>> How does the mode 5 O2 sensor change work.
>>>>>>>>> Ive not found this in the EC3 documentation.
>>>>>>>>>=20
>>>>>>>>> Steve
>>>>>>>>>=20
>>>>>>>>>> On 31 May 2020, at 4:08 am, Stephen Izett =
stephen.izett@gmail.com <flyrotary@lancaironline.net> wrote:
>>>>>>>>>>=20
>>>>>>>>>> Hi Finn
>>>>>>>>>>=20
>>>>>>>>>> Thats good news.
>>>>>>>>>> At some point I=E2=80=99ll plug the EC3 in and see what the =
EM3 reports.
>>>>>>>>>>=20
>>>>>>>>>> We=E2=80=99re finally back in the air and testing again after =
the last 3 months of responding to COVID here in Perth.
>>>>>>>>>>=20
>>>>>>>>>> Last mods included some reshaping of inlets and diffusers and =
tidying up the inlet manifold (grinding smooth some weld that had =
penetrated into the runners).
>>>>>>>>>>=20
>>>>>>>>>> Yesterday our Renesis 4 port max fuel flow is up 10% to I =
think a reasonably accurate 18 gal/hr at 7100rpm, 29.5 inch of MAP and =
mixture at best power.
>>>>>>>>>> We burn our Australian Premium Unleaded with no Ethanol which =
I believe is 6.26 lb/gal so I=E2=80=99m thinking thats around 190hp.
>>>>>>>>>>=20
>>>>>>>>>> Cheers
>>>>>>>>>>=20
>>>>>>>>>> Steve
>>>>>>>>>>=20
>>>>>>>>>>=20
>>>>>>>>>>=20
>>>>>>>>>>> On 31 May 2020, at 12:58 am, Finn Lassen =
finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:
>>>>>>>>>>>=20
>>>>>>>>>>> Wrong engine code solved!
>>>>>>>>>>>=20
>>>>>>>>>>> I looked at the dates of files in the EC3CL folder. These =
files were not updated to the date I programmed the EC3:
>>>>>>>>>>> ECCL8.cof
>>>>>>>>>>> ECCL8.map
>>>>>>>>>>> ECCL8.O
>>>>>>>>>>>=20
>>>>>>>>>>> <mcppihngfoiehjon.png>
>>>>>>>>>>>=20
>>>>>>>>>>> So I started from scratch:
>>>>>>>>>>>=20
>>>>>>>>>>> Unzipped the EC3CL folder.
>>>>>>>>>>>=20
>>>>>>>>>>> Set ENG =3D A8; LS2COIL, LGSEC and WIDEBAND to 1 and rest to =
0.
>>>>>>>>>>>=20
>>>>>>>>>>> Did "Erase", "Clean" and "Build All" and "Program" in MPLAB =
and reinstalled chip for controller A.
>>>>>>>>>>>=20
>>>>>>>>>>> Now EM3 correctly shows "A8" for engine code.
>>>>>>>>>>>=20
>>>>>>>>>>> Changed to narrow band using mode 5, and EM3 display =
correctly changed from 16 to 12 for ENGINFO.
>>>>>>>>>>>=20
>>>>>>>>>>> I must have chosen the "Make" option in MPLAB when I first =
programmed the chips, I guess.
>>>>>>>>>>>=20
>>>>>>>>>>> Unfortunately I must have damaged the controller B CPU chip =
when handling it (MPLAB reports device ID =3D 0) and will have to order =
a new one.
>>>>>>>>>>>=20
>>>>>>>>>>> Finn
>>>>>>>>>>>=20
>>>>>>>>>>> Still waiting for the $1.79 shipped copper washers to arrive =
in mail. Maybe I should bite the bullet and order five (six) Stat-O-Seal =
washer/O-rings at $8.56 per pack of two. $25.68 total :(
>>>>>>>>>> --
>>>>>>>>>> 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
>>>>>>>>>=20
>>>>>>>> --
>>>>>>>> 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
>>>>>>>=20
>>>>>>=20
>>>>>> --
>>>>>> Homepage:  http://www.flyrotary.com/
>>>>>> Archive and UnSub:   =
http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>>>>=20
>>>>> --
>>>>> Homepage:  http://www.flyrotary.com/
>>>>> Archive and UnSub:   =
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>>>>=20
>>>> --
>>>> Homepage:  http://www.flyrotary.com/
>>>> Archive and UnSub:   =
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>>>>=20
>>>=20
>>>=20
>>> --
>>> Homepage:  http://www.flyrotary.com/
>>> Archive and UnSub:   =
http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>> --=20
>>> Regards Andrew Martin Martin Ag
>>=20
>>=20
>=20
>=20
> --
> Homepage:  http://www.flyrotary.com/
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