Edge 1030 always says 0 Anaerobic TE while Fenix 5s+ says 2.9 TE(example) why?

Check that the HR zones are correctly set-up on the Edge including the value for resting HR and that they match what is on the Fenix.

Check that the power zones match as well.

I checked my Fenix 5S+ and my Edge 1030. On both of the devices the settings are identical. LT HR zones on both. I checked the Power zones too and those all match. 

The only place I can find for those settings on Garmin Connect is under the devices section and those are identical to what is on the actual device. Where do I find the Secondary HR settings /Calculation mode in Garmin Connect? 

If I go under Devices in Garmin Connect I can see that the Fenix 5S+ has zones I can set for various activities. Is this what you mean by secondary HR settings? Mine are the same for the “general” setting and the cycling setting on the Fenix 5s+. But my 1030 Edge only has one setting that I can find. The Fenix seems to get the Anaerobic TE readings, it is the 1030 that always calculates Anaerobic TE as 0. 

Are you capturing two activites - one on the Fenix and one on the Edge?  Or just one activity?

I capture my bike ride on my Edge 1030 only, and allow Physio TrueUp to synchronise it to Connect and see the results on my Fenix 5.  I used to capture everything on the Fenix, and have different zones setup for running and cycling on the Fenix, but on the Edge I haven't changed much, and just realised I might be using default HR zones on the Edge.  But the true-up feature, which is enabled on both devices, is working (I have some problems with how it represents itself on my HR and stress metrics, but that's a separate topic).

Is your HRM strap connected to the Fenix?

Well I’ve tried to do things as suggested but it is not helping. Today I did a workout where I touched so many zones for various amounts of time. The Edge 1030 said it was 3.7 Aerobic and 0.0 Anaerobic. The Fenix 5s+ said the workout was 3.6 Aerobic benefit and 2.1 Anaerobic benefit. That is a huge difference. 

The 1030 also said my Vo2 went up a point in the past couple of days, but the Fenix has not increased my V02 yet. I thought physio trueup would sync those so they are the same. But that doesn’t appear to be happening. On the Garmin Connect it reads the V02 for cycling from my Fenix not my 1030. 

I do track the activity on both devices. I do this mainly because I like to use the Intensity Minute feature to make sure I’ve been working out about the same week to week. Or at least not overly slacking on any week. I need to track the workout for the intensity minutes to track on the Fenix (intensity minutes are not tracked on the 1030). In the past I would track the workout on the Fenix and then not save it. This would get me my Intensity Minutes. However, I started to notice that I was no longer getting any Anaerobic activity on my Edge 1030 but my Fenix was crediting me with lots of anaerobic benefit. 

I’m torn about which device to use now. On my bike I love using my 1030. I load up my workouts and it is easy to see if I’m meeting my expectations and how long I have to go. What setting is not working on the 1030? I simply cannot figure that out. 

If anyone has any other suggestion please let me know. 

I do use a heart rate strap for both devices. I put the Fenix on my handlebars alongside my 1030. So the heart rate data is identical on both devices. They both get power readings from Vector 3 pedals. The 1030 and Fenix gather the exact same data. The only difference might be just a few seconds when I click on to start before the other. But that is minuscule amount of time and really only misses seconds in the beginning and end of a ride as I start and stop devices. So I would think the readings would be pretty darn close for how much Aerobic and Anaerobic benefit I’m getting but I’m just getting nothing on the Edge at all. I’m wondering now if I should just start deleting the Edge workout, but I really hate that. It has a way better battery life and can handle an all day ride, I haven’t tracked a ride like that on my Fenix yet, but I don’t think the battery could handle it. So it would be best if I could get the edge 1030 to give me a reading for Anaerobic Benefit.

Thanks to anyone who can help me. 

To me this definitely sounds like 1030 has HR zones set differently. Specifically the beginning of Zone 5 is wrongly set and so it thinks you are always in the aerobic zone. Any chance you have set separate HR zones for cycling and these are taken into account? In web-based Garmin Connect, press Devices and Sync Status in the top right corner, choose 1030, select Device Settings. Then choose User Settings tab. You will see Heart Rate Zones. My bet would be that either your primary zones are wrong or you have added Cycling Zones and those are wrong.

I do have secondary setting and cycling setting. However they were nearly identical. It was only zone 1 that was different. The rest matched. One had zone one lower end set to 20, the other had it set for 35. I made them match. But the HR zones are completely identical there otherwise and so are the power zones. 

But thank you for telling me where that was. I think someone else posted that they fixed theirs by changing those settings to something besides %LTHR

Does the 1030 lean more heavily toward HR zone when calculating Anaerobic benefit? Or should it be the same as the Fenix? Because I just did another workout, this time Vo2 intervals. The 1030 finally gave me .7 Anaerobic benefit but the Fenix gave me 2.7 Anaerobic benefit. Try as I might I was just too tired to get my HR up into zone 5 for more than 4 minutes. But my Power was in zone 5 for 17 minutes. I just couldn’t keep the cadence high enough to raise my heart rate a little more. 

The settings are idetical on each device everywhere I can find, on the devices themselves, on the garmin connect app and website. 

Now that I know where the settings are I will try what MJTanman suggested to put the secondary settings at %Reserve on Garmin Connect website. It might be a few days to test because I’ve done too many tough workouts lately. 

Do they have the same values for Vo2 max?

Could you post the settings.fit file from both units?