ICS ELECTRONICS 4809A, Instruction Manual

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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 Trigge
r
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
0
1
2
3
4
5
6
7
_
MEANING DEFINED BY PCG CODE
MEANING DEFINED BY PCG CODE
TABLE A-1 IEEE 488 COMMAND AND ADDRESS MESSAGES