Kevin Horton
Well Known Member
I've got a Trio ProPilot autopilot and a Garmin GNS 430W. The GPSS lateral steering from the 430W has always worked well with the ProPilot. Yesterday was the first time I've been to an airport with an LPV approach since I installed the autopilot, so it was the first opportunity I've had to try out the GPSV vertical steering. It didn't work
I loaded the KMTW RNAV RWY 17 approach in the 430W, and it went active. LPV was showing in green reverse video on the 430W when I was on the final approach segment. The GPSS lateral steering was working. The vertical path was there on the CDI, but the GPSV LED on the ProPilot never blinked, lit or did anything at all.
As I understand it, the GPSV signal comes over the same ARINC 429 bus as the GPSS signal, so if GPSS works that should mean my wiring is OK. I can't find any mention of any special configuration or tricks in the Trio manuals, so I think everything is setup OK on the autopilot end. But, the 430W Installation Manual lists many different options for the ARINC 429 DATA OUT. I'm pretty sure I've got "ARINC 429" selected as the format. I don't recall whether I've got High speed or Low speed selected.
If anyone has their ProPilot's GPSV working with a GNS 430W, I'd love to know what your setup is for the ARINC 429 Config. Which 429 format have you selected? High speed or low speed? I'm only going to be in Manitowoc for another couple of days, and then I'll be heading back to Ottawa. There are no LPV approaches in the Ottawa area, so I'd like to take advantage of my time here to debug this.
Thanks for any info or advice.
I loaded the KMTW RNAV RWY 17 approach in the 430W, and it went active. LPV was showing in green reverse video on the 430W when I was on the final approach segment. The GPSS lateral steering was working. The vertical path was there on the CDI, but the GPSV LED on the ProPilot never blinked, lit or did anything at all.
As I understand it, the GPSV signal comes over the same ARINC 429 bus as the GPSS signal, so if GPSS works that should mean my wiring is OK. I can't find any mention of any special configuration or tricks in the Trio manuals, so I think everything is setup OK on the autopilot end. But, the 430W Installation Manual lists many different options for the ARINC 429 DATA OUT. I'm pretty sure I've got "ARINC 429" selected as the format. I don't recall whether I've got High speed or Low speed selected.
If anyone has their ProPilot's GPSV working with a GNS 430W, I'd love to know what your setup is for the ARINC 429 Config. Which 429 format have you selected? High speed or low speed? I'm only going to be in Manitowoc for another couple of days, and then I'll be heading back to Ottawa. There are no LPV approaches in the Ottawa area, so I'd like to take advantage of my time here to debug this.
Thanks for any info or advice.