The command you need should be hf 14a raw -sc <HEX>
Unfortunately I don’t see a way to make it keep scanning for the tag, so you’ll need to have the PM3 in position as you send the command as it will be quite fast
You can add a delay to the command to give you time to position the PM3 if necessary:
If you have any questions are run into any problems, let us know and we’ll try to help further