Printronix MVP Series - Manual (Page 181)

Interfaces 8–13
Option 65 — Busy Line
MVP/L150
A high active busy line normally indicates the printer cannot receive data
(the printer is advancing paper or is offline). The configuration may be set
for active busy with any print line terminator including CR=0 line feeds.
Option
Number
Display Configuration
Description
.0 65.0 Enable character by character handshake mode using busy (default).
.1 65.1 Enable active Busy with print line terminator control code.
150B/L150B
Option 65 must be set to 65.0.