Epson GS ( C pL pH m fn b <Function 4>

CONFIDENTIAL
Paper roll Customize commands GS ( C
Ver. 10.0 1 p. 566
GS ( C pL pH m fn b <Function 4>
[Name] Transmit the remaining capacity of the NV user memory
[Format] ASCII GS ( C pLpHmfnb
Hex 1D 28 43 03 00 00 fn 00
Decimal 294067 300fn0
[Range] ( pL + pH × 256) = 3 ( pL = 3, pH = 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