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ASCII Code Summary Appendix F
ChartScan User’s Manual F-3
ASCII Code Details
Decimal Values 00 to 31 – ACG & UCG Characteristics
ASCII Control Codes (Decimal 00 to 31)
Dec
Value
Hex
Value
($ or &H)
Character
and
Abbreviation
Name Bus Message
Addressed Command Group (
ACG
)
00 00
None / NUL
Null None
01 01
^A / SOH
Start of Header Go To Local (
GTL
)
02 02
^B / STX
Start of Text None
03 03
^C / ETX
End of Text None
04 04
^D / EOT
End of Transmission Selected Device Clear (
SDC
)
05 05
^E / ENQ
Inquiry None
06 06
^F / ACK
Acknowledgement None
07 07
^G / BEL
Bell Parallel Poll Disable (
PPD
)
08 08
^H / BS
Backspace Group Execute Trigger (
GET
)
09 09
^I / HT
Horizontal Tab Take Control (
TCT
)
10 0A
^J / LF
Line Feed None
11 0B
^K / VT
Vertical Tab None
12 0C
^L / FF
Form Feed None
13 0D
^M / CR
Carriage Return None
14 0E
^N / SO
Shift Out None
15 0F
^O / SI
Shift In None
Universal Command Group (
UCG
)
16 10
^P / DLE
Data Link Escape None
17 11
^Q / DC1
Device Control 1 Local Lockout (
LLO
)
18 12
^R / DC2
Device Control 2 None
19 13
^S / DC3
Device Control 3 None
20 14
^T / DC4
Device Control 4 Device Clear (
DCL
)
21 15
^U / NAK
Negative Acknowledgement Parallel Poll Unconfig (
PPU
)
22 16
^V / SYN
Synchronous Idle None
23 17
^W / ETB
End of Transmission Block None
24 18
^X / CAN
Cancel Serial Poll Enable (
SPE
)
25 19
^Y / EM
End of Medium Serial Poll Disable (
SPD
)
26 1A
^Z / SUB
Substitute None
27 1B
^[ / ESC
Escape None
28 1C
^\ / FS
File Separator None
29 1D
^] / GS
Group Separator None
30 1E
^^ / RS
Record Separator None
31 1F
^_ / US
Unit Separator None
Notes:
• ASCII control codes are sometimes used to “formalize” a communications session between
communication devices.
•
DC1, DC2, DC3, DC4, FS, GS, RS,
and
US
all have user-defined meanings, and may vary in
use between sessions or devices.
•
DC4
is often used as a general “stop transmission character.”
•
Codes used to control cursor position may be used to control print devices, and move the print
head accordingly. However, not all devices support the full set of positioning codes.