User`s manual
7–43Digital Emulation
Vertical Format
Vertical format consists of two control codes that program the printer to
make fast vertical paper movements (slewing) during print jobs. Vertical
formatting increases printer efficiency and reduces printing time for
repetitive printing jobs.
Vertical channels in the form are defined by downloading the Vertical Format
Unit (VFU) from the host to the printer. Subsequent data is then printed on
the form at the specified channel. These functions are achieved by using
control sequences.
Two control sequences, Load VFU and End VFU, are used to enact the VFU
load procedure. Besides loading the VFU, top–of–form is also defined.
Top–of–form is determined by the actual paper position when the load VFU
command is sent to the printer; therefore, be sure to align the paper at the
desired top–of–form before sending the LOAD VFU command.