Oki Pos 441 User Manual download pdf (Page 50)

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11-2. Pins and Signal Names

Pin No. Signal Name Direction Function

1 FG — Frame ground

2 TXD OUT Transmission data

3 RXD IN Receive data

4 RTS OUT Always space

5 N.C. Not connected

6 DSR IN Dip switch 2-7 = OFF

(1) STAR Mode

Status of this signal is not checked.

(2) ESC/POS Mode

• In DTR/DSR communication mode

Memory Switch 4-5 = “0”:

signal line indicating whether host is

enabled or disabled to receive data is

checked.

Space: Host enabled to receive

Mark: Host disabled to receive

Memory switch 4-5 = 1:

Status of this signal is not checked.

• In X-ON/X-OFF communication mode, status of

this signal is not checked.

Dip switch 2-7 = ON

This is an externally reset signal.

A mark above 1 ms pulse width engages reset.

7 SG Signal ground

8 -19

N.C. Not connected

20

DTR OUT Indicates whether data receive from host is enabled or

disabled.

DTR/DSR Communication Mode

Space when receive is enabled.

Printer status

Memory switch 6-9

0 1

1. During the period from when

the power is turned on (includ-

ing resetting using the interface)

to when the printer is ready to

receive data.

BUSY BUSY

2. During self printing and dot align-

ment adjustment.

BUSY BUSY

3. When the printer stops printing

due to a paper end or an optional

paper near end.

BUSY —

4. When an error has occurred.

BUSY —

5. When the receive buffer becomes

full.

BUSY BUSY

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