A coder can fire and a reader can return a string while the wrong pack continues down the line. The useful record is the chain from trigger to confirmed removal.
Treat trigger, encode, read, decision, reject confirmation and the stored record as separate steps. This sequence is an editorial checklist for readers of machine documents. It is not a clause copied from a coding standard, and it is not a test this site has performed.
Keep the value sent to the marker and the value returned by the reader as two fields. A match is not yet a removed pack. The reject verification guide uses the same confirm idea. A hypothetical code “X-100” in a training file is simulated data, not a batch that existed.
OMAC’s PackML description covers consistent machine data and state. It does not grade a printed code. If a device manual states a minimum quiet zone or a reader limit, cite that manual and its date. Do not move the number into this site’s voice.
Related handoff notes are in line buffers. The section home is Packaging Automation.
Method and sources
The sequence is editorial. OMAC’s PackML page was read on 14 October 2026 to keep machine-state language from being treated as print verification. No coder manual was quoted.