Qualcomm performance requirement

Just checking here to see if this cop is accurate or misguided in his inspection. This cop is a county based commercial inspector. We pass through this county on a regular basis hauling sand. The situation is that the cop checks the qualcomm for the e logs and then he checks the performance portion of the qualcomm. If the qualcomm does not show rpm when running and no rpm when off, he writes the driver a ticket for the qualcomm not being plugged into the truck ecm. I cannot find any reg stating that an e-log must show engine data. The only things I can find that are required is hours of service. Is this cop making up laws. I am in the great state of Texas.
As a mechanic and a driver, I do not like the ecm data monitor of the qualcomms. I have seen on several occasions where the qualcomm screws with the ECM and causes several different problems. Volvos seem to be the most affected by this. As soon as the ecm is unplugged from the qualcomm, all is well again. The qualcomms that are not monitoring ecm data still work in all other functions. I can see where a fleet may want to monitor it's vehicles data, but for owner ops it is not needed in most circumstances.
I am looking for replies where actual regulations support what this cop is requiring or confirmation that there is no reg for data monitor. Opinions are great, but it is hard to argue opinion with LEO.

 

The company we are contracted to requires a qualcomm in the truck. They do not require the ecm data though. I actually prefer to use keep trucking log app. Great app and combines the benefits of paper and e log. Paper log and keep trucking app do not monitor ecm data and I would be willing to bet that cop would not even expect data info then. I am not sure where he is coming up with the idea for the data monitor requirement for the qualcomm.

 

Why not just hook it up? The answer is because of the problems we have seen.

I just read all of the 395.15 requirements and no where does it say ecm data is required. Still not sure how the inspector could ticket me when the requirement is not there.

 

The onboard system is the qualcomm and sensor failure is for the qualcomm errors. Not vehicle sensor failures. Our qualcomms do not show vehicle sensor failure even when installed properly.