Valhalla Scientific 4300C, Operation Manual

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42
Notes: 1 Devices Address messages shown in decimal
2 Messages codes are:
DCI Device Clear LLO Local Lockout SDC Selected Device Clear
GET Device Trigger PPC Parallel Poll Configure SPD Serial Poll Disable
GTI Go to Local PPU Parallel Poll Unconfigure SPE Serial Port Enable
Note that the table is divided into two main groups: the primary command group and the secondary
command group. The secondary command group is not utilized in the 4300C.
The primary command group is further divided into four subgroups as follows:
1. Addressed Command Group - applied only to addressed devices.
2. Universal Command Group - applied to all devices.
3. Listen Address Group - set of devices listen addresses.
4. Talk Address Group - set of devices talk addresses.
Data in the above command groups is sent with ATN "true". These types of commands are understood by
all devices using the IEEE-488 standard. When data is sent with ATN "false", it is referred to as a
device
dependent command. A device dependent command is specific to a particular device and may or may not
be understood by other devices.
7
Requires Secondary Command
0 1 2 3 4 5 6 7
← COLUMN
ISO BIT & 7 0 0 0 0 1 1 1 1 ROW
DIO LINE
6 0 0 1 1 0 0 1 1
↓
NUMBER 5 0 1 0 1 0 1 0 1
4 3 2 1 ASCII MSG ASCII MSG ASCII MSG ASCII MSG ASCII MSG ASCII MSG ASCII MSG ASCII MSG
0 0 0 0 NUL DEL SP 00 0 16 @ 00 P 16 ‘ p 0
0 0 0 1
SOH GTI DC1 LLO ! 01 1 17 A 01 Q 17 a q 1
0 0 1 0 STX DC2 “ 02 2 18 B 02 R 18 b r 2
0 0 1 1
ETX DC3 # 03 3 19 C 03 S 19 c s 3
0 1 0 0
EOT SDC DC4 DCI $ 04 4 20 D 04 T 20 d t 4
0 1 0 1
ENQ PCC 7 NAK PPU % 05 5 21 E 05 U 21 e u 5
0 1 1 0
ACK SYN & 06 6 22 F 06 V 22 f v 6
0 1 1 1 BEL ETB ` 07 7 23 G 07 W 23 g w 7
1 0 0 0 BS GET CAN SPE ( 08 8 24 H 08 X 24 h x 8
1 0 0 1
HT TCT EM SPD ) 09 9 25 I 09 Y 25 i y 9
1 0 1 0 LF SUB * 10 : 26 J 10 Z 26 j z 10
1 0 1 1 VT ESC + 11 ; 27 K 11 [ 27 k { 11
1 1 0 0 FF FS , 12 < 28 L 12 \ 28 l | 12
1 1 0 1
CR GS - 13 = 29 M 13 ] 29 m } 13
1 1 1 0
SO RS . 14 > 30 N 14 ^ 30 n ~ 14
1 1 1 1
SI US / 15 ? UNL O 15 _ UNT o DEL 15
ADDRESSED
COMMAND
GROUP
(ACG)
UNIVERSAL
COMMAND
GROUP
(UCG)
LISTEN
ADDRESS
GROUP
(LAG)
TALK
ADDRESS
GROUP
(TAG)
PRIMARY COMMAND GROUP
(PCG)
SECONDARY COMMAND GROUP
(SCG)
Table 8 - ASCII Character Codes