Epson C107001 - LQ 570+ B/W Dot-matrix Printer Dimensioni

EPSON AMeRIc& INC.

EPSON

Product Support Bulletin

Subject:

Understanding and Using

ESCP/2

Commands and Syntax

Date: 12/4/91

Page(s): 1 of 14

PSB No: P-0082

Originator: JW

This bulletin provides detailed explainations and illustrations for some of the more

commonly used printer commands used in ESC/P2 Listed below are the

commands discussed in this bulletin.

Command Command Name

PSB Page

ESC X m n1 n2

Select Pitch and Point Size 2

ESC ( C m1 m2 n1 n1 Set Page Length in Defined Units

ESC(v m1 m2 n1 n2

Set Relative Vertical Position

ESC(V m1 m2 n1 n2

Set Absolute Vertical Position

ESCtn

Select Character Table

ESC ( t n1

d1 d2 d3

Assign Character Table

ESC(

nln2d,.

Print Data as Characters

PSB No: P-0082

Page: 2 of 14

ESC X m n1 n2

(Select Pitch and Point Size)

C X m n1

the

command for selecting pitch and point size

where

and

are variables. The

vadable

is used

select

the pitch, which is the character

spa&g.

The

variable

W”

selects the point size and the variable

“n2”,

at this time,

will always be 0 (zero). The variables

In”

and

91’

ate explained below.

Thevaluesusedfor’m’ateO,l,18,21,24,30,36,4248,60,and72

tf’o”is

usedasthevaluefor”m”,therewillbenochangeinpit~.

lf”lVsusedasthe

value far

the character pitch will be proportional spacing. To determine the

character

pit&

for

all

other values of

%I”,

divide 360 by

“m”.

For example, if

rn=W

then 360

divided

by 60 equals 6 and the character pitch is 6 characters per inch. If

m=30,

the character pitch is 12 characters per inch.

FortheRomanandSansSerifforrts,thevaiueausedfor’nimare0,16,20,TI,24,

28,3238,40,42,44,48,5238,8Oand84.

ForaUotbrfonts,Utevaluesusedfor

“nlmare0,21,and42

l’heactualpaintsbthatwillprintisnl

didedby2

For

example, if

nl=20,

the

point

size

is 10.

nl=48,

the

point

size

is 24.

NOTE:

When

selectina

Doirft

size

laraer

than 24

(the

value for nl is treater than

select

twof3ortional

wacina

tm=ll

for the

character

me&.

In the Basic programming language, the command would look like this.

LPRlf+lT

cHR$(n);*xll;CHRS(l);CHR$(48);~~~(o);”~his is24pointproportional

spaced”

Ch6(27)

is ESC,

cW(l)

selects

proportional spacing,

chr$(48)

selects 24 point

character size. At this time,

zero (0).

PSB No: P-0082

Page: 3 of 14

10 INPUT “Point Siie”;A$

20 B=VAL(A$)*2

RESTORE 70

22FORX=l

TO16

23READY

IF B=Y THEN GOT0

25NMTX

26CLS

27 PRINT A$

”

is not a valid point size choice.”

GOT0 10

C=VAL(A$)

LPRM

CHR$(27);“X”;CHR$(l);CHR$(B);CHR$(O);”n‘lese

are

“;A$;”

point

characters”

LPRtNT

CHR$(27);“(V”;CHR$(2);CHR$(O);CHR$(C);CHR$(o)

GOT0 10

DATA

0,16,20,21,24,28,32,36,40,4~44,48,52,56,60,64

Line 10

allows you to specify the point size desired.

Line 20

computes the value for

“nl”

in the ESC X command.

tine 21

check to ensure that a valid point size was input

the point size is

valid, the program jumps to line 30.

the point size is not valid, the

program prints a message on the screen and starts over again.

Line 30

computes the value for

“nl

”

for advancing paper using the ESC ( v

command.

Line 40

sends the “Set

Pitch

and Point

Size”

command to the printer. (Note: The

pitch is set for proportional spacing for

ail

point sizes to ensure proper

character spacing regardless of the point size.)

Line

sends the “Set Relative Vertical Position” command to the printer. This

command advances the paper in preparation for printing the next line.

Line60-

causes the program to start again at the beginning.

NOTE: To hatt the program, hold down the

“CM

key and press the

“c”

key.

PSB No: P-0082

Page: 4 of 14

These are 8 point characters

These are 10 point characters

These are 10.5 point characters

These are 12 point characters

These are 14 point characters

These are 16 point characters

These are 18 point characters

These

are 20 point characters

These are 21 point characters

These are 22 point characters

These are 24 point characters

These are 26 point characters

These are 28 point characters

These are 30 point characters

These are 32 point characters

PSB No: P-0082

Page: 5 of 14

ESC ( C m1 m2 n1 n2 (Set Page Length in Defined Units

ESC

(

nl n2 is the command for setting the page length in units where ml,

m2,

nl and

are variables. The

“uniV’

is usually

l/380

of an inch unless defined

othenwise

by the “ESC (

l.Y

command. Currently, the values for ml and

MUST be

and

m2=0.

To determine the values for n1 and n2 perform the following steps.

Determine the desired page length in inches.

Multiply the page length by 380.

Divide the result by 256 using long division.

The remainder in the quotient from step 3 is the value for n1.

The whole number in the quotient from step 3 is the value for n2.

EXAMPLE

The page length is 8.5

inches.

8.5 x 380 = 3060

3080

divided

by 258

11 with

remainder of 244.

nl=244

n2=11

In the Basic programming language, the command would look like this.

This command, as listed in the line above, will set the page length to 8.5 inches.

NOTE: The current line becomes the top of form. This command cancels any

previously set top and bottom margin settings.

you wish to set the top and bottom

margins via software command, the commands must be issued

AFTER

the

“Set

Page

Length in Defined Units” command. The proper page length setting can be confirmed

by issuing a “Form Feed” command,

chr$(l2),

or by pressing the “FF button on the

control panel while the printer is

“Cff

Line”.

PSB No: P-0082

Page: 6 of 14

ESC ( v m1 m2 n1 n2 (Set Relative

Verticai~~~

ESC

v ml

is the command for advancing the print position

verticaiiy

unitswhereml,m2nl

andn2arevariables.

The5nCisusually1/36Oofaninch

unless defined otherwise by the “ESC (

command. Currently, the values for ml

and

IT@

MUST be ml

and m2=0.

To determine the values for

and n2 perform the following steps.

Determine the desired vertical motion dii in inches.

Multiply the distance by 360.

Divide the result by 256 using long division.

The remainder in the quotient from step 3 is the value for n1.

The whole number in the quotient from step 3 is the value for n2

EXAMPLE

The desired distance is 1 inch.

1x360=360

36Odiidedby256=1witharemainderofl04.

nl=lO4

n2=1

In the Basic programming language, the command would look like thii.

Thiscommand,aslistedintheiineabove,willfeedthepaperuplinchfromthe

ament

line. The current print column (horizontal position) IS NOT changed.

‘Reverse” paper feed less than

l/2

inch can be performed with this command. To

accompliih

Wvers#

paper feeding requires the following steps.

Determine the desired vertical motion dice in inches.

Multiply the distance by 360.

Divide the result by 256 using long division.

Subtract the remainder in the quotient computed in step 3 from 256.

The result from step 4 is the value for n1.

Thevaluefofn2willahnfaysbe255.

PSB No: P-0082

Page: 7 of 14

EXAMPLE

The desired distance is

l/4

inch.

1/4x 360 = 90

90 divided by 256

with

remainder

90.

2%90=166

n1=166

n2=255

In the Basic programming language, the command would look like this.

LPRlNT

CHR$(27);“(v”;CHR$(2);CHR$(O);CHR$(166);CHR$(255)

This command, as listed in the line above, will feed the reverse feed the paper 1/4 inch

from the current line. The current print column (horizontal position) IS NOT changed.

PSB No: P-0082

Page: 8 of 14

V m1 m2 n1

is the command for changing the print position vertically (with

respect to the Top of Form position) in units where ml,

m2,

nl and

are variables.

TheZlnit”isuswllyl/~afaninchunlessdefinedatherwisebythe”ESC(U

command.

Currently, the values for ml and

MUST be ml

‘and

m2=0.

To determine the values for nl and

perform the following steps.

Determine the desired vertical

dice

from the Top of Form in inches.

Muttiplythe

dice

by380.

Divide the

resutt

by 258 using long

division.

The remainder in the quotient from step 3 is the value for nl.

The whole number in the quotient from step 3 is the value for

EXAMPLE

The

desired dice from the Top of Form is 1 inch.

1x380=380

36Odiidedby258==

witharemainderof104.

nl=lO4

n2=1

In the Basic programming language, the command would look like this.

Thiscommand,as~~~brthelineabwg.willpositionthepaperl

inchfromthe

current Top of Form setting. For example, if the Top of Form setting is the top edge

of the paper, the paper will be positioned so that the printer is ready to print 1 inch

down from the top edge of the paper.

PSB No: P-0082

Page: 9 of

ESC t n is the command for selecting a character table to be used for printing where

n is a variable. The following table lists the values for n and the character table

associated with the value.

Table

3I PC437 (US)

Table 1

NOTE: 1. Character tables other than those listed above can be assigned by using

the ESC ( t command (Assign Character Table).

The value used for n can be either the ASCII value OR the ASCII character

(i.e.

chr$(l)

“1”).

In the Basic programming language, the command would look like this.

Lf’RlNT

CHR$(n);Y:CHR$(O);

CHR$(27)

is ESC and

CHR$(O)

selects table

(italic).

PSB No: P-0082

Page:

ESC ( t

.d2

d3 (Assign Character

Tabie)

ESC

t nl

dl d2

is the command for assigning character tables where n1,

n2,

dl,d2,andd3arevariables.

CurrenUy,variabknl,n2andd3MlJSTbenl=3,

n2=0,

and

d3=0.

Variable dl is a number corresponding to one of

the

four tables

selectable with the ESC t n command. This is the table that will be replaced. Valid

valuesford

areO,1,2,and3(seeTabtel

below). Variabled2isanurnbar

corresponding to a registered table.

lhii

is the table that

will

replace

the table

indicated by Variable d1. Valid Values for d2 are 0,

1,3,7,8,

and 9 (see Table 2

MOW).

SeIectabIeTabIe

-1

Italic

Table 1

Iwic

I 3

IPC95O(Intemationa0

Table2

After using the ESC ( t command, the ESC t n command MUST be sent to select the

table before printing from the new table.

For example, the command ESC ( t 3 0 1 3

0 is sent (assign Registered Table 3

(PC950)

to Selectable Table 1

(PC437).

In order

to print the

character (ASCII

245),

the command ESC t 1 must be sent. In the Basic

programming language, the sequence would be as follows:

t.PRtNT

CHR$(27);“CT);CHR$(3);CHR$(O);CHR$(l);CHR$(3);CHR$(O);

LPRINT

CHR$(27);7’;CHR$(l);

LPRINT

CHR$(245)

Some ESC/P2 documentation may illustrate as many as 22 different Registered

Tables. The Registered Tables are a part of the character set, therefore, they are

contained in the Character Generator ROM. The CG ROM differs based upon the

destination country. For

thii

reason, only the above Registered Tables are available

LQ-570,

LQ-1070,

LQ-870

and

LQ-1170

printers sold for the U.S. market. Foreign

Character Generator ROMs ARE NOT available in the United States. The following

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