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G3X, GFC 500 and an IFD 540 |
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LANCE 
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Joined: 06 Dec 2014 Location: TEXAS Status: Offline Points: 277 |
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 Posted: 09 Feb 2020 at 10:30pm |
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I hope not. I have a slow internet connection. Downloading and updating navdata and obstacles for my IFD550 from Jeppesen takes less than a minute. Downloading and updating the microSD cards for my Aspens from Seattle Avionics took 4 hours and 28 minutes last night.
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Gring
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Joined: 30 Dec 2011 Location: Kingston, NY Status: Offline Points: 720 |
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Posted: 09 Feb 2020 at 5:52pm |
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No.
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brou0040
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Posted: 09 Feb 2020 at 2:28pm |
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So is going to another navdata vendor... Did he imply it was reasonably possible such that they were looking at implementing it in a relatively near software update?
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Gring
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Posted: 09 Feb 2020 at 12:44pm |
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anything is possible, right?
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brou0040
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Posted: 05 Feb 2020 at 3:02pm |
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Did Steve imply it was possible to make this work?
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Gring
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Posted: 01 Feb 2020 at 5:59pm |
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Yes, descent profile and the VS in the user settings are the same thing.
I had a lengthy conversation with Steve L at Avidyne last week about this exact subject. Hopefully it will make a future release. |
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chflyer
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Joined: 24 Jan 2013 Location: LSZK Status: Offline Points: 1022 |
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Posted: 01 Feb 2020 at 9:44am |
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That's what I suspected, fundamentally.
What exactly do you mean by the Descent profile in the user settings? I understand the VSR data block to just be a dynamic value reflecting the VS (in the user setting units) required to reach the wpt at the end of the current leg from the current altitude at current ground speed. Are you thinking of the advisory glideslope shown for approaches without a published one? I'm sure you're right that the GFC500 VNAV function is only supported by the GTN, not the GNS either. I've heard that the data stream is different (and unpublished so Avidyne can't just emulate it). It can't be related to an ARINC connection alone because the GNS/IFD also supports those connections to a G5 (via GAD29). A shame that the IFDs don't support this capability. |
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Vince
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Gring
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Posted: 01 Feb 2020 at 8:05am |
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The VNAV that is being discussed is the ability for the GFC500 to follow the altitude constraints on waypoints in the flight plan automatically based on your descent profile in the user setup pages.
Garmin has a data stream from the GTN series of navigators that will allow this capability with the GFC500/600 autopilots. The way it works is to setup the Descent profile in the user settings - you know, the one that is used for the VSR data block calculation. Then put an altitude constraint on one or more waypoints or a loaded approach - cross WIGGY intersection AT 5000. The press the the VNAV button on the GFC500 and the autopilot will fly along until it hits the VNAV profile descent rate, automatically descend to 5000 and cross WIGGY. It is my understanding that the GNS navigators do not have this capability either. I believe it is because the GTN is using a data stream on a different communications line - CAN or ARINC, but I haven’t looked into it in detail. LPV, ILS, LNAV/VNAV approaches work just the same as any other autopilot. These function fine.
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chflyer
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Posted: 01 Feb 2020 at 6:42am |
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Can anyone explain what is meant by VNAV guidance here?
My suspicion is that this refers to the Garmin-specific VNAV (+V) guidance on LNAV and LOC approaches or VFR or perhaps VNAV on enroute or arrival crossing altitudes. I don't believe that the IFDs provide VNAV enroute / arrival crossing altitude guidance to any autopilot, so it seems to be a GTN-specific function.
Edited by chflyer - 01 Feb 2020 at 7:58am |
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Vince
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krjaction
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Posted: 06 Jan 2020 at 2:09pm |
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that’s what I can’t find a definitive answer on.
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chflyer
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Posted: 06 Jan 2020 at 12:47pm |
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That would seem to imply that a G5/GFC500 does not support VNAV guidance coming from an IFD. Or am I jumping to conclusions here?
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Vince
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krjaction
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Posted: 06 Jan 2020 at 11:11am |
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There are special Garmin labels added in the GTN software 6.51 to support VNAV on the G5/G3X Touch and GFC 500. They are called Garmn429 labels.
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programmer@pcmforles
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Joined: 03 May 2018 Location: Reno, NV Status: Offline Points: 47 |
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Posted: 03 Jan 2020 at 11:24am |
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Yes, TT definitely will get VNAV for coupled approaches, I believe it is the same label, but I'm wondering if perhaps the info contained in the label will not work for waypoint altitudes. I guess I should have been a bit clearer. The TT and the GFC 500 do use the VNAV label info as they will both do coupled up approaches, but I'm wondering if there is not enough info contained in that label for crossing altitudes, top of climb altitudes, etc..... Or perhaps those commands are not injected into the data stream in the GNS and IFD architecture. It could be as simple as an FAA certification issue not allowing it. A lot of this is pure speculation based on what I have seen, tried, read, etc... I have no inside engineering knowledge at all on this.
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programmer@pcmforles
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Posted: 03 Jan 2020 at 10:53am |
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Did a copy and paste, it is a complete mess since it was in a table format, but here is a listing and the little dosts were telling which configurations that particular label is enabled under
6.1.9.1 GPS ARINC Output The data output on the GPS ARINC out port depends on the configuration of the unit. Below is a list of configurations and label outputs for each: 1. ARINC 429 2. GAMA 429 3. GAMA 429 Graphics 4. GAMA 429 Graphics w/Int 5. GAMA 429 Pro Line 21 6. GAMA 429 Sextant 7. GAMA 429 Bendix King **Note: Label 117 and 327 are enabled or disabled via a separate Mx setting
Label Number Parameter Name 1 2 3 4 5 6 7 001 Distance to Go • • • • • • • 002 Time to Go • • • • • • • 012 Ground Speed • • • • • • • 074 Data Record Header • • • • • • 075 Active Waypoint From/To Data • • • • • • 100 Selected Course 1 • • • • • • • 113 Message Checksum • • • • • • 114 Desired Track • • • • • • • 115 Waypoint Bearing • • • • • • • 116 Cross Track Distance • • • • • • • 117 Vertical Deviation • • • • • • 121 Horizontal Command • • • • • • • 125 Greenwich Mean Time • • • • • • • 147 Magnetic Variation • • • • • • 203 Pressure Altitude • • • 251 Distance to Go • • • • • • • 252 Time to Go • • • • • • • 260 Date • • • • • • 261 GPS Discrete Word 1 • • • • • • 275 LRN Status Word • • • • • • 300 Station Declination, Type and Class • • • • • • 303 Waypoint Header • • • • • • 304 Waypoint ID #1 - #3 • • • • • • 305 Waypoint ID #4 - #6 • • • • • • 306 Waypoint Latitude • • • • • • 307 Waypoint Longitude • • • • • • 310 Present position Latitude • • • • • • • 311 Present position Longitude • • • • • • • 312 Ground Speed • • • • • • • 313 Track Angle • • • • • • • 314 True Heading • • • • • • • 315 Wind Speed • • • • • • • 316 Wind Angle • • • • • • • 320 Magnetic Heading • • • • • • • IFD5XX/4XX Installation Manual 600-00299-000 Page 75 of 267 Revision: 18 321 Drift Angle • • • • • • • 326 Lateral Scale Factor • • • • • • 327 Vertical Scale Factor • • • • • 330 Conic Arc Inbound Course • • 331 Conic Arc Radius • • 332 Conic Arc Course Change Angle • • 333 Airport Runway Azimuth • • 334 Airport Runway Length • • 335 Holding Pattern Azimuth • • 340 Procedure Turn Azimuth • • 351 Distance to Destination • • • • • • 352 Estimated Time to Destination • • • • • • 371 Specific Equipment ID • • • • • • 377 Equipment Hex ID Code • • • • • • • |
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programmer@pcmforles
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Posted: 03 Jan 2020 at 10:49am |
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Newest IM manual
6.1.9.1 GPS ARINC Output Page 74 There is a full listing of the ARINC labels and which ones are active for each configuration
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chflyer
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Posted: 03 Jan 2020 at 10:29am |
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A lot of the questions here and in other threads would be easier to troubleshoot if Avidyne had a way (maintenance page?) to show what ARINC labels are being received and presented. A second best would be to have them documented in the IM manual and make it readily available as Garmin does, without needing to go through a dealer.
Edited by chflyer - 06 Jan 2020 at 12:49pm |
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Vince
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skitheo
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Posted: 03 Jan 2020 at 10:27am |
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I did verify that the TT/Aerocruze will couple vertical guidance when fly an RNAV LP approach. Different label? [EDIT: Thanks Bryan]
Edited by skitheo - 03 Jan 2020 at 10:28am |
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chflyer
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Posted: 03 Jan 2020 at 10:25am |
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My comment was just to indicate that the IFD is clearly getting the baro setting you mentioned is required.
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Vince
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programmer@pcmforles
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Posted: 03 Jan 2020 at 10:22am |
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I will be flying my IFD550 tied to TruTrak next tuesday and I will put in a couple crossing altitude commands into my flight plan and see if the TruTrak will pick them up, but I do not believe it is programmed to pick the VNAV info out of the 429 Stream out of the navigator and process them in any way.
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programmer@pcmforles
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Posted: 03 Jan 2020 at 10:19am |
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I don't believe so. I installed a GFC500 in a Bonanza for a customer that had dual G5 we did last year and an IFD550. The VNAV functionality will not enable and it is not an allowed function with the GNS530 and since the IFD series is built on the Architecture of the GNS series I believe as far as the garmin autopilot is concerned they are one in the same. The GTN series do allow VNAV lablels to pass to the GFC500 via G5's or G3X. I'm not sure why the IFD and GNS for that matter is not allowed to send them along for VNAV for crossing altitudes, etc...
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skitheo
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Posted: 03 Jan 2020 at 10:15am |
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Yes, same results when I replaced all of my 6-pack with an Aspen EFD 2000 MAX. However, my question is: will the IFD send VNAV labels via GPSS for altitude constraints? EDIT: I would test it myself, but have a fuel tank out of the wing for repair.
Edited by skitheo - 03 Jan 2020 at 10:17am |
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chflyer
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Posted: 03 Jan 2020 at 10:10am |
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FWIW, I have a G5 AI (called ADI by Garmin) primary, not backup, connected to my IFD540. When I added the G5, the IFD540 calculator started showing the altitude in green, indicating that it was being automatically populated. Also, when flying a missed approach with the first leg climb to altitude, the IFD540 now automatically sequences to the next leg when that altitude is reached rather than presenting the "manual sequencing required" message. Besides the G5, you also need a GAD29B to present the ARINC labels to the IFD.
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Vince
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skitheo
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Posted: 02 Jan 2020 at 5:49pm |
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On a similar vein, will the altitude constraints work with the TruTrak Vizion / BK aerocruze 100 in GPSS mode?
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krjaction
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Posted: 07 Nov 2019 at 4:28pm |
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Hello,
First post. I just ordered an IFD 540 and 440 to swap in for my 530W and 430W. Been playing with the trainer app for months and love the IFD. I have a 1979 Piper Turbo Dakota and I'm having my panel rebuilt next year and adding a G3X, G5 backup and GFC 500 autopilot. I have some questions about VNAV capture on the GFC 500. I read that to get VNAV to work properly from the IFD to the G3X and G5 the IFD needs a baro source and a setting in setup set to ENABLE LABELS. I know the IFDs can have altitude constraints on each waypoint, but I'm a little fuzzy on whether or not the VNAV capture mode on the GFC 500 will work like it does with a GTN 750 with an IFD 540. Thanks, Kevin |
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brou0040 wrote: