A-6
A
ASCII
NUL
SOH
STX
ETX
EOT
ENQ
ACK
BEL
BS
HT
LF
VT
FF
CR
SO
SI
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
ASCII -- IEEE 488 BUS MESSAGES (COMMANDS AND ADDRESS) HEX CODES
Notes:
1. Device Address messages shown in decimal
2. Message codes are:
3. ATN off, Bus data is ASCII; ATN on, Bus data is an IEEE MSG.
DCL -- Devices Clear
GET -- Device Trigger
GTL -- Go to Local
LLO -- Local Lockout
PPC -- Parallel Poll Configure
PPU -- Parallel Poll Unconfigure
SDC -- Selected Device Clear
SPD -- Serial Poll Disable
SPE -- Serial Poll Enable
ADDRESSED
COMMAND
GROUP
UNIVERSAL
COMMAND
GROUP
LISTEN ADDRESS GROUP
TALK ADDRESS GROUP
SECONDARY COMMAND
GROUP
PRIMARY COMMAND GROUP (PCG)
LSD
MSD
MSG
GTL
SDC
PPC
GET
TCT
ASCII
DLE
DC1
DC2
DC3
DC4
NAK
SYN
ETB
CAN
EM
SUB
ESC
FS
GS
RS
US
MSG
LLO
DCL
PPU
SPE
SPD
ASCII
SP
!
"
#
$
%
&
'
(
)
*
+
,
-
.
/
MSG1
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
ASCII
0
1
2
3
4
5
6
7
8
9
:
;
<
=
>
?
MSG1
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
UNL
ASCII
@
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
ASCII
P
Q
R
S
T
U
V
W
X
Y
Z
[
\
]
^
MSG1
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
MSG1
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
UNT
ASCII
`
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
MSG
ASCII
p
q
r
s
t
u
v
w
x
y
z
(
|
)
~
DEL
MSG
01
2
3
45
6
7
_
MEANING DEFINED BY PCG CODE
MEANING DEFINED BY PCG CODE
TABLE A-1 IEEE 488 COMMAND AND ADDRESS MESSAGES
