4.1
Normal-density bit image mode setting by ESC K +
nl
+
nz
To convert the printer’s operation mode from Text to Normal-density Bit Image, the
“ESC K + nl +
nz”
code must be input. (Here, the sign “+” is inserted for the purpose
of legibility only and should not be input in actual operation.) Namely, when ESC
(<
1
B>
H and K
(<
4B>
H) codes and data
ni
and
nz
are input, the Printer recognizes
the data following the “ESC K” as the bit image data. nl and
nz
are the hexadecimal
numbers each consisting of 2 digits which define the amount of the bit image data
to be transferred.
r-n
represents the low-order two digits while
nz
represents the high-order two digits.
In the normal-density bit image processing, the maximum number of dot positions
printable per line is 576. Therefore, the values of ni and
nz
specified in excess of
576 dot positions are ignored and printing of the bit image data after the 576th dot
position is not guaranteed.
Mixing of text data and bit image data is possible on the same line.
NOTE: Assign values to
nr
and
nz,
respectively as follows.
n2
ni
I
I
i
I
1
I
i
MSB
LSB
MSB
LSB
215
216
213
212
2”
210
29 28
2’
26
25
24 23
22
2’
20
As shown above, nl is set hexadecimally as low-order bytes and
nz
as high-order
byte.
(Ex. 1) Input data
Text
(20
characters)
ESC K
n = 576 Bit-image data
Next data
20 characters in text mode correspond to 120 bit-image positions (20 x 6
-
120).
So the remaining printable positions in Bit-image mode are 456 (576
-
120
-
456).
If 576 data are input as bit-image mode characters, the first 456 data can be printed
but the remaining 120 data are ignored and thus not printed.
(Ex. 2) Input data
n2,
ni
q
n’2,
n’i
1
Data
A
ESC
K
ni
nz
Data
B
Data
C
ESC
K
n’i
n’z
Data
D
Bit-image
data
j
Text
data
/.
1
Bit-image
data
{
576 bit-image positions
-68-
