Epson TM-L90 series, Programming Manual

Page: 566 / 679

C O N F I D E N T I A L
Paper roll Customize commands GS ( C Ver. 10.01 p. 566
GS ( C p
L
p
H
m fn b <Function 4>
[Name] Transmit the remaining capacity of the NV user memory
[Format] ASCII GS ( C
p
L
p
H
m fn b
Hex 1D 28 43
03 00 00 fn 00
Decimal 29 40 67 3 0 0 fn 0
[Range] (
p
L
+
p
H
×
256) = 3 (
p
L
= 3,
p
H
= 0)
m = 0
fn
= 4, 52
b
= 0
[Description] Transmits the number of bytes of remaining memory (unused area) in the NV user memory.
• ESC/POS Handshaking Protocol is not required for this function.
[Notes]
■
With this function, the printer sends the “Header to NUL” data shown below:
(*1)
The available capacity indicates the number of bytes not being used.
■
The decimal value for the available capacity is converted to ASCII character data and sent from the most
significant digit.
Example: When 120 bytes is available (not being used), the number 120 is expressed with
3 bytes of data (Hexadecimal: 31H, 32H, and 30H / decimal numbers = 49, 50, and 48).
■
See previous [Notes for transmission process] for process sending data group.
Send data Hex Decimal Data quantity
Header 37H 55 1 byte
Identifier 29H 41 1 byte
Available Capacity
(*1)
30H
−
39H 48
−
57 1
−
8 bytes
NUL 00H 0 1 byte