Panasonic LP-310 Operation Manual page 172

Control Sample 2: In case of marking data switching file
■
Mark the same
character.
When ending marking
172
Turn the key switch to ON.
1. File No. change
2. Status request
Marking ready status is
"1 Marking Ready Status"
YES
3. Marking Trigger
Change file No..
Turn the key switch to OFF.
FNO command
STS command
NO
Re-send STS command
after leaving for a while.
MRK command
Change file No.