IFD 5 Series & IFD 4 Series Touch Screen GPS/NAV/COM

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IFD + Aspen + STec 55X

Printed From: Avidyne
Category: Avidyne General
Forum Name: IFD 5 Series & IFD 4 Series Touch Screen GPS/NAV/COM
Forum Description: Topics on Avidyne's IFD 5 Series and IFD 4 Series Touch Screen GPS/NAV/COM
URL: http://forums.avidyne.com/forum_posts.asp?TID=2630
Printed Date: 26 Dec 2024 at 4:45pm
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com

Topic: IFD + Aspen + STec 55X

Posted By: PA20Pacer
Subject: IFD + Aspen + STec 55X
Date Posted: 12 Feb 2024 at 1:04pm

All-

I am having difficulty getting an STec 55X GPSS to work with my IFD540 coupled to an Aspen ProMax and ACU2. I know the 55X requires the ARINC 429 Label 121 for the GPSS function. Can anyone confirm that the IFD will indeed pass this roll steering label on to the Aspen via the 429 data stream? Any other thoughts or experiences with similar configuration issues are welcome!

Bob

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Bob Siegfried, II
Brookeridge Airpark (LL22)
Downers Grove, IL

Replies:

Posted By: AviSteve
Date Posted: 12 Feb 2024 at 6:13pm

Yes, label 121 is included in the GAMA 429 output from the IFD.

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Steve Lindsley
Avidyne Engineering

Posted By: oskrypuch
Date Posted: 13 Feb 2024 at 9:41pm

I have a 55x/IFD/Aspen combo. Works great, except that I need to keep the power OFF to the 55x, until the IFD has booted. If I don't, then the Stec GPSS mode will fault, it has to do with channel speed sync, and that is only fully available during the 55x startup.

* Orest

Posted By: PA20Pacer
Date Posted: 19 Feb 2024 at 8:57am

Just to follow up on this, I appreciate the responses! I am afraid that my concern was due to operator error, but the information you provided gave me some peace of mind until I was able to confirm proper GPSS function in flight. Without thinking too hard about it, while I was ground testing the new autopilot operation, I programmed a route into the IFD and activated GPSS on the 55X, after which I received a GPSS FAIL message on the 55X. In the air, The GPSS function worked great, and the combination of the IFD, Aspen, and 55X is really nice.

Best,

Bob

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Bob Siegfried, II
Brookeridge Airpark (LL22)
Downers Grove, IL