No Amps Showing on Skyview Screen

[DonFromTX]

OK I need some help.  I have the shunt installed and wired per the manual, each side going to pins 24 and 25 of the EMS 220 but have no charge or discharge showing on the skyview screen.  Do I need to "install" something in the skyview to make it read out the charge and discharge amps?  I know it is charging, I get a rise in the volts to 14 when increasing RPMs and should get a discharge (like -4 amps or so when engine is not running).
l should add that this is an RV12 wired for D180, then conversion harness to Dynon Skyview, further modified to work with a Viking engine rather than the Rotax.  I am running an automotive type 45 amp alternator. The original RV12 shunt was discarded and replaced with the Dynon shunt.

 

[skysailor]

You said "each side going to pins 24 and 25". You should have one end of the shunt to pin 24 and the other end to pin 25. If you meant this configuration and I misinterpreted, I apologize.

 

[DonFromTX]

Yeah my poor choice of words. One end of the shunt goes to 24, and the other end to 25

 

[Dynon]

Do you have an amps widget on your EMS page at all? If not, make sure that the pins are set to amps under SETUP > EMS SETUP > SENSOR IN PUT MAPPING. Then add a widget under EMS SETUP > PAGE LAYOUT under the page that you want to see amps on.

 

[DonFromTX]

Do you have an amps widget on your EMS page at all? If not, make sure that the pins are set to amps under SETUP > EMS SETUP > SENSOR IN PUT MAPPING. Then add a widget under EMS SETUP > PAGE LAYOUT under the page that you want to see amps on.

I do have the widget OK, the path from the EMS 220 to the display is the problem I feel. In the RV12 we have a box (AV5000 I think) that does that, but in changing things that path has been cut and I cannot figure out how to bypass that.

 

[Dynon]

The EMS has data connection to the display. So if you're getting ANY engine data, that link is working entirely. The connection downstream from the amps pins on the EMS D37 connector (pins 24 and 25) is where you want to look. On your aircraft, I think the "shunt" is built into that box. That's the connection you want to chase.

 

[DonFromTX]

The EMS has data connection to the display. So if you're getting ANY engine data, that link is working entirely. The connection downstream from the amps pins on the EMS D37 connector (pins 24 and 25) is where you want to look. On your aircraft, I think the "shunt" is built into that box. That's the connection you want to chase.

I am not expressing myself clearly.  The original Rotax/RV12 had a low capacity shunt in a switch panel that I removed because none of it was usable, I am using a Viking engine.  The original shunt was tossed (because my alternator was too large for the Vans shunt) and I am using one of your shunts, with the wires going from the shunt to the EMS pins 24 and 25.  Apparently I am missing the connection from the EMS 220 to the Skyview because of removing the original shunt.  I would guess there should be some wires from the 37 pin EMS 220 to the Skyview, and those are what are missing?  This is somewhat of a guess since there is no other way to get the information from the EMS 220 to the display.
I think I am not getting anything from the EMS 220, all my sensors are directly connected, I do get voltage reading though from somewhere..

 

[jakej]

The only connection for EMS data from the EMS module to Skyview is via the network cable (9 pin dsub) are you saying the sensors are connected directly to Skyview ?  IF so then make up (or buy) a network cable (it's in the manual) , female to female 9 pin dsub connectors pins in parallel but pins 4 & 8 also pins 1 & 6 are twisted pairs.

HTH

 

[Dynon]

The EMS has data connection to the display. So if you're getting ANY engine data, that link is working entirely. The connection downstream from the amps pins on the EMS D37 connector (pins 24 and 25) is where you want to look. On your aircraft, I think the "shunt" is built into that box. That's the connection you want to chase.

I am not expressing myself clearly.  The original Rotax/RV12 had a low capacity shunt in a switch panel that I removed because none of it was usable, I am using a Viking engine.  The original shunt was tossed (because my alternator was too large for the Vans shunt) and I am using one of your shunts, with the wires going from the shunt to the EMS pins 24 and 25.  Apparently I am missing the connection from the EMS 220 to the Skyview because of removing the original shunt.  I would guess there should be some wires from the 37 pin EMS 220 to the Skyview, and those are what are missing?  This is somewhat of a guess since there is no other way to get the information from the EMS 220 to the display.
I think I am not getting anything from the EMS 220, all my sensors are directly connected, I do get voltage reading though from somewhere..

So the shunt is just a pair of connections that go to the SV-EMS-220, but is "just another sensor" to the SV-EMS-220. So the first question is: Do ANY of your engine gauges work (oil temp, oil pressure, rpm, etc)? If yes, then your SV-EMS-220 is connected to SkyView, and your shunt inputs signals are included in that data link. If nothing is showing, then we need to investigate why your SV-EMS-220 isn't communicating with SkyView. The EMS module sends all of its data over D9 SkyView Network connector that is separate from the D37 and D25 connectors.

Can you take a picture of what you see on your EMS page and email it to us at support at dynonavionics dot com?

 

[jakej]

my input was due to the OP's last sentence  ----    "I think I am not getting anything from the EMS 220, all my sensors are directly connected, I do get voltage reading though from somewhere..

 

[skysailor]

Any chance the fuses in the wires going from the new shunt to the EMS were left out during the switch? Might seem too simple but easy to check. After this it would seem a conitnuity check of the wire from shunt to EMS pin might be in order.

 

[DonFromTX]

Any chance the fuses in the wires going from the new shunt to the EMS were left out during the switch? Might seem too simple but easy to check. After this it would seem a conitnuity check of the wire from shunt to EMS pin might be in order.

Currently I think there is NO 9 pin connection between the EMS 220 and the Skyview! I have the wiring behind the panel covered at present, but am pretty sure that connection does not exist.

 

[jakej]

Any chance the fuses in the wires going from the new shunt to the EMS were left out during the switch? Might seem too simple but easy to check. After this it would seem a conitnuity check of the wire from shunt to EMS pin might be in order.

Currently I think there is NO 9 pin connection between the EMS 220 and the Skyview!  I have the wiring behind the panel covered at present, but am pretty sure that connection does not exist.

THAT was how I read it too, the NETWORK cable is missing & if that is the case then you would not see the EMS on the list after doing a system config.

 

[DonFromTX]

OK, here is a screenshot.  I have determined that I have the cable from EMS to Dynon, and the setup is correct.

 

[DonFromTX]

And another screenshot:

 

[DonFromTX]

And yet another:

[/img]

 

[dynonsupport]

Your screenshot shows zero, but your engine is not running, and from what we gather, your shunt is on the alternator output? So zero is expected here. Everything looks fine in the screen shots.

A quick test is to take one of the EMS wires off the shunt. This should cause huge readings on the Amps. If it doesn't, you have a wiring issue or a EMS module issue. Try it with both wires.

Second, check that the two EMS wires are not shorted together. You can use an ohmmeter for this.

A final test is to take off both EMS wires from the shunt and use a 1.5V battery to power them. This should make the Amps read +99 or -99. If that doesn't work, you have an issue with wiring or the EMS again.

Given we almost never see the EMS fail on amps and have the amps read zero, we're still suspicious of the wiring, but anything is possible.

 

[DonFromTX]

Did everything except the 1.5v battery test.  Not sure if you wanted the battery between a lead and ground, or the battery between the two leads.  Don't like the smell of smoke. ;D

 

[dynonsupport]

Either is fine and won't smoke anything. But I meant between the two leads

 

[DonFromTX]

OK, did the 1.5 volts across the two shunt leads to the EMS.  To my surprise the Skyview amps ran up and over the limit, then made a red x on the widget, back to zero when I disconnected.  I was certain I was missing a wire somewhere, so was surprised at this action.
This begs an answer to another question:  Can you burn out a shunt?  Way back when I had a nav antenna flop over onto the shunt, made some smoke and heated up the nav antenna wire shield, at that stage I did NOT have the shunt to EMS wires installed yet..  A good friend has a spare new shunt, should I try that next?