Printronix L5020 - Manual (Page 234)

Appendix Interfaces
236
Dataproducts Parallel Interface Configuration
The printer is configured for the Dataproducts interface via the
Dataproducts Interface menu, as described on page 70. The
following interface configuration parameters may be modified to
meet specific application requirements:
Data Bit 8 Enable* or Disable
Paper Inst Line Enable or Disable*
Data Polarity Standard* or Inverted
Strobe Polarity Standard* or Inverted
Data Req Pol Standard* or Inverted
Ready Polarity Standard* or Inverted
Online Polarity Standard* or Inverted
Paper Instr Pol Standard* or Inverted
* = Factory default setting