Samsung SRP-275 Operator's Manual page 59

CHAPTER 5
CONTROL COMMANDS LIST
[Notes] - When the specified record exists, the printer sends the "Header to NUL"
data shown below:
Send data
Header
Identifier
Identification status (*1) (*2)
Data (*3)
NUL
(*1) When the quantity of stored data exceeds 80 bytes, the printer
performs partial processing, using the following rules:
- If there is unsent data, the identification status of the third byte is
41H or 65 decimal.
- If there is no unsent data, the identification status of the third byte is
40H or 64 decimal.
(*2) The printer performs batch processing when the data to be stored in the
specified record is 80 bytes or less. At this time, the identification status
of the third byte is 40H or 64 decimal.
(*3) The key code and terminator are not included in the data.
- If the host specifies a nonexistent record, the printer sends the
"Header to NUL" data shown below:
Send data
Header
Identifier
Identification status
NUL
- See [Notes for transmission process] for description of transmission
process.
- See [Notes for ESC/POS Handshaking Protocol] for description of
ESC/POS Handshaking Protocol.
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Hex Decimal Data quantity
37H 55 1 byte
70H 112 1 byte
40H or 41H 64 or 65 1 byte
20H __FEH 32 __254 1 -80 bytes
00H 0 1 byte
Hex Decimal Data quantity
37H 55 1 byte
70H 112 1 byte
40H 64 1 byte
00H 0 1 byte
GS ( C pL pH m fn b <Function 3>
[Format] ASCII GS ( C pL
Hex 1D 28 43 03
Decimal 29 40 67 3
[Range] (pL + pH x 256) = 3 ( pL = 3, pH = 0)
m = 0
fn = 3, 51
b = 0
[Description] The printer sends the host the number of data bytes currently used in the
NV memory area.
- ESC/POS Handshaking Protocol is not required for this function.
[Notes] - With this function, the printer sends the "Header to NUL"
data shown below:
Send data
Header
Identifier
Identification status 30H - 39H
NUL
(*1) The quantity of stored data bytes, plus the key code and terminator, equal
the capacity being used.
- The decimal value expressing the capacity being used is converted to
ASCII character data and sent from the most significant digit.
Example :
When 120 bytes is used, the number 120 is expressed with
three bytes of data (Hexadecimal: 31H, 32H, and 30H / decimal numbers
49, 50, and 48).
When no memory area is used, the number 0 is expressed with
1 byte of data. (Hexadecimal: 30H / decimal number 48).
- See previous [Notes for transmission process] for process sending
data group.
pH m fn b
00 00 fn 00
0 0 fn 0
Hex Decimal Data quantity
37H 55 11 byte
28H 40 1 byte
48 - 57 1-8 bytes
00H 0 1 byte
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