(2) Interface indicator
The INTERFACE indicator $ shows which of the printer's interfaces is currently active. It uses
the following abbreviations:
The PAR , SER , or OPT indicator flashes when the printer is receiving data and remains indicated
for the duration of the interface time-out time.
(3) Paper size indicator
The SIZE indicator # indicates the size of the current paper cassette. Default is Letter size for the
U.S.A. and A4 for European countrie. While the printer is Processing data to print, the SIZE indicator
switches to indicate the paper size selected by the application software.
The following abbreviations are used to indicate paper sizes.
Message
A4
DL
A5
C5
A6
b5
B5
EX
B6
#6
LT
#9
LG
HA
MO
OH
BU
CU
FS-1800/1800N | FS-3800/3800N
Message
No interface is currently used
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Standard bidirectional parallel interface
PAR
Serial interface (RS-232C)
SER
[Option] network interface card
OPT
ISO A4 (21 × 29.7 cm)
ISO DL (11 × 22 cm) *
ISO A5 (14.8 × 21 cm)
ISO C5 (16.2 × 22.9 cm) *
ISO A6 (10.5 × 14.8 cm) *
ISO B5 (17.6 × 25 cm) *
JIS B5 (18.2 × 25.6 cm)
Executive (7-1/4 × 10-1/2 inches) *
JIS B6 (12.8 × 18.2 cm) *
Commercial 6-3/4 (3-5/8 × 6-1/2 inches) *
Letter (8-1/2 × 11 inches)
Commercial 9 (3-7/8 × 8-7/8 inches) *
Legal (8-1/2 × 14 inches)
Japanese postcard (10 × 14.8 cm) *
Monarch (3-7/8 × 7-1/2 inches) *
Return postcard (20 × 14.8 cm) *
Business (4-1/8 inches) *
Custom size (14.8 × 21 cm to 21.6 × 35.6 cm)
Meaning
Paper size
* with only the MP tray feeding
2-20