Yes, they don’t work well together even IRL. VNAV only does what we tell it to do. It is oblivious to weather, traffic, and even obstacles. ATC wants traffic to flow in an orderly manner in the airspace. VNAV doesn’t know about “traffic flow”.
VNAV and ATC work together to have aircraft meet waypoint crossing restrictions but not all waypoints have restrictions and it is possible to manually override restrictions.
What is tod?
Top Of Descent. It’s the point in your flight plan calculated to bring you down to the airport’s pattern altitude from your cruise level.
Frequently my communication to ATC is silent and only ATC is audible. What can I do to have both function audibly
In my IFR/ILS flights, I’m on on approach (activated) with GS captured descending down the glideslope and ATC is telling me to climb back up to the cruise altitude.
In the USA, Equally alarming, is which Controller (Tower or Approach) is issuing those Clearances , and why an Approach controller is turning you over to Tower, when you are still having IFR vectors to the ILS, and neither the pilot or controller has confirmed that you are actually established on then ILS.
Maybe this is closer to the way they do this outside the USA ? 
Switch TEXT-TO-SPEECH to OFFLINE in Sound settings.
Most likely you started your approach without getting clearance to the interception point or you didn’t follow STAR properly. ATC in this game does not care where you are, it cares if you flew over certain “checkpoints” along the route. If you skip one checkpoint ATC will keep giving you instructions to that checkpoint. Imagine a Forza game or similar where you have to drive through checkpoints along the track. If you miss one, the lap won’t count until you drive back and pass that checkpoint.
Obvious, ATC does not care. Or has no knowledge of my
IFR/ILS Flight Plan.
I’d rather stay on AP Approach & glideslope and land rather than follow
ATC instructions and fly at cruise altitude until I run out of fuel.
It does if you submit your IFR plan before you hit FLY. I use ATC for all my IFR flights and don’t have such problems.
I don’t know how to submit my IFR plan before I hit FLY.
Please, tell me how to do it.
Thanks
Use Simbrief (free) to create your flight plan and download in fs2020 format
Go to world map in flight sim and click on more at the bottom followed by load flight plan
Pick the folder you downloaded your flight plan to (normally download folder for me)
The flight plan including SIDS and STARS will load in to world map and put your plane at departure airport
Manually select the parking stand you want to start from in the drop down menu at the top
Click fly
You are right. I think that I have figured it out.
I replace the discon with waypoint, AGNSS.
CJ4 AP does fly the flight plan correctly.
But the ATC expects the waypoint PATRN to be met.
And wants me to return to cruise altitude.
At 18 nm past KEWR, ATC directs me to contact NY
Center.
NY Center ATC advises to continue to PATRN while I am flying away from KEWR and PATRN.
On the runway prior to takeoff, if I enter PATRN into the scratchpad and replace the discon, then ATC does follow the flight plan.
I wonder why the PATRN waypoint is replaced with a discontinuity.
Happens if you pause the flight.
You would think using a stock plane with stock map and stock ATC would all work together.
However this is not just a stock plane, it has been worked over by Working Title and has a Rockwell Collins FMC.
As such while the stock map & ATC will work in sync with each other (looking for PATRN), the plane will behave in a different and more realistic manner.
The Rockwell Collins is looking for an airway to join the departure airport to the first waypoint or a SID.
If it doesn’t have either of these then it comes up with a discontinuity (realistic) as it would presume you’ll be getting ATC vectors instead if neither of these are selected.
The workarounds are:
Incidentally, PATRN is not included in any real world routing between these 2 airports
Thanks for the explanation.
I tried using a SID but it is even more confusing.
Don’t know what a (VECT) means.
I tried requesting vectors from ATC and requested them 2 or 3 times.
But, flying the vectors does not do anything.
And does not seem to affect the AP.
Just flying vectors with the Heading.
Oh well, I’m learning.
Anyway, thanks again.
In the real world, it means ATC will vector you, then clear you to a waypoint on your fight plan (i.e. “Proceed direct PATRN” in your case), and you will use a DIRECT TO in the FMC to activate it, then hit NAV, and Bob’s Your Uncle.
As you have seen, vectors are broken in MSFS. Some alleged improvements are coming in SU14, but I’m not on the beta so I’m not sure how much it’s really improved, or if it can actually handle departure vectors. That would be helpful for places like KORD where there are no SIDs and everything is vectors.
Now, I understand.
I tried it again.
When I heard ATC say “Cleared direct PATRN”, I hit the Direct button and then the PATRN waypoint.
AP flew to PATRN then to AGNSS and down the flight plan
and then I hear from ATC:
“You’re below your designated altitude. Climb to 3000 feet.”
I’ll try again.
ATC is broken in msfs so you do need to make allowances for this, the CJ4 presuming vectors is a real world thing which doesn’t really work in the sim at the moment.
Think of it as the CJ4 being far more realistic than msfs flight planning or msfs ATC.
If you want to do vectors to the first waypoint yourself either use heading mode or direct to exactly like you just did but Simbrief will clear up all these issues, not only is it compatible with msfs it is also very compatible with the CJ4 and will automatically work out the best SID & STAR (if applicable).
According to SimBrief, the download instructions for MSFS are:
Download this file anywhere onto your PC.
Open your simulator and go to the “World Map” screen.
Click “Load/Save” at the bottom of the screen, then click “Load”.
Browse to and select the *.PLN file you downloaded in Step 1.
NOTE: After import, you may need to reselect your SID, STAR, or approach using the provided dropdown menus.
Whenever I import from SimBrief, I always reload the SID and STAR because the SimBrief flight plans (.pln file) do not contain SID and STAR waypoint altitude and speed restrictions needed by ATC. This is why ATC seems broken because descent instructions aren’t issued early enough.
Currently MSFS (including ATC) only process correctly flight plans (.pln files) created or modified using the World Map. Flight plans (.pln files) from other sources do not import correctly for MSFS ATC. The “workaround” is to use the World Map to modify the imported flight plan, not use flight plans created outside of MSFS, or not use MSFS ATC.
Personally, before every flight I review the SID and STAR for altitude and speed restrictions. If ATC does not issue climb or descent instructions correctly, I request the new altitude from ATC and dial in the speed restrictions. This works for me most of the time.
There have been recent MSFS updates enabling in some cases upload of FMC-entered flight plans to MSFS ATC. This assumes the flight plans entered into the FMC are complete and correct.
