Oh sorry, I try to find general solution, indeed in COE(CAN over EtherCAT) before "sync time" done my process and send on BUS, if I couldn't done this timing my process fall.
Sorry, it is still completely unclear what you actually want. Assuming your primary language is not English, maybe you could use google translate to write your question in your native language and then post it in English.
To delay an operation, you could use stall dataflow (only available in relatively new LabVIEW versions) or an explicit equivalent.
I'm not familiar with COE, but I did find a couple of basic links.
You also might want to re-post your question on the hardware forum.
When you post, describe what you want to do, and what you have tried so far. Most importantly, attach some code to your post!
but I have some computing data, they need to ready before timing of "sync Message" . indeed I need to timing on my calculating data
This thread is getting a little long, so let me try and summarize whilst I make some guesses. Please tell me if any are close, or correct me as I go wrong. Numbers are used to allow referencing, not to imply any order or importance.
Showing your VI would really be fairly crucial to get significantly useful help with this, I would have thought.
The Original Poster keeps asking questions that seems to be about timing some section of (thus far unseen) code. The Poster's knowledge of LabVIEW seems quite limited, with a major issue being that a number of LabVIEW Experts (many of them LabVIEW Champions) who have tried to help have apparently "not understood the problem" (or the Poster has not understood the explanation, which is certainly the case).
Given this lack of communication, it seems clear (to me) that someone needs to look at the Poster's code, get a better understanding of the issue, and based on this knowledge, make suggestions for alleviating the problem. One way to do this is for the Poster to hire a local LabVIEW Expert and pay for the advice. The alternative is to post the code here and allow the experts who have already tried to make "blind" suggestions get a fresh understanding of the issues and possibly provide targetted "solutions". Otherwise, we (the Forum Users and the Poster) are probably wasting our time.