UP-3300 (serv.man14). Service Manual - Sharp EPOS Service Manual (repair manual). Page 26

No.

COMMAND

FUNCTION

CODE

55

GS r n

Transmit status

<1Dh><72h> n

n = 1, 49

Selects which status is to be covered by automatic status transmis-
sion.

The meaning of each bit of “n” is as follows.

n

Function

1, 49

Transmits paper detector status. (Same as ESC v)

The data to be transmitted are listed on the next page.

When DTR/DSR control is selected, the status is transmitted after the
printer confirms that the host computer is ready to receive data (DSR
signal is ON). If the host computer is not ready to receive data (DSR
signal is OFF), the printer waits until the computer is ready. 

When XON/XOFF control is selected, one byte is transmitted without
checking if is ready to receive data. 

This command is executed during receive buffer expansion. There-
fore, if there is other data in the receive buffer, some delay may be
caused between command receiving and status transmitting.

DLE EOT:

Transmit status in real time

ESC v:

Transmit paper detector status

n=1, 49: Paper detector status

bit

Function

Value 0/1

0

Near end detector

Paper is present/Paper is out

1

Not defined

2

Not defined

3

Paper end detector

Paper is present/Paper is out

4

Not used

Fixed to 0

5

Not defined

6

Not defined

7

Not used

Fixed to 0

No

COMMAND

FUNCTION

CODE

56

GS w n

Select horizontal size

<1Dh><77h>n

2 

à

 n 

à

 6

Selects the horizontal size (magnification) of the bar code.“n”
specifies the number of dots in one module.

n = 2

4 – 19