COMPUTER CONTROL OF THE 1996R CPU
The ten 1996R CPU control ports use asynchronous, full
duplex, RS-232 protocol. As shipped, all ports are set for
operation at 1200 baud with 8 data bits, 1 stop bit, and no
parity. The 1996R ports are programmed for type of use, baud
rate, and communication parameters via the on-screen Ports
menu (page 4-20). For computer control of the 1996R, the
port must be set for “KEYBOARD” Port Use via this menu.
ASCII code is used for all system control commands to these
ports. The ASCII codes used to control the 1996R are
printable ASCII characters; these are shown in the table at the
right. Lower case ASCII letters a through d are used as
command terminators; these are shown in the table to the lower
right. The terminator codes identify the source of the
command; that is, which keyboard is connected to a 1981 Port
Expander (four keyboards may be connected via a Port
Expander).
The software XON/XOFF handshake codes, Control Q (DC1
or HEX 11) and Control S (DC3 or HEX 13), are supported.
Other ASCII control codes such as LF (HEX 0A) are ignored.
To request 2050 Switching System actions from a computer,
the computer must send the same characters that would be sent
from a keyboard for the desired actions. For example:
To call camera 25 to the current monitor, send the following
command sequence: 25, Camera, Terminator
(ASCII codes: 25 # a) or (HEX codes: 32 35 23 61).
To call preset scene 3 from that camera, send the following
command sequence: 3, Call Shot, Terminator
(ASCII codes: 3 \ a) or (HEX codes: 33 5C 61).
To request continuous system actions, such as pan, tilt, zoom,
or focus, repeat the command codes for that action, followed
by a terminator, for as long as the action is desired. The
command code sequence should be repeated approximately 15
times per second. For example:
To pan the camera to the right, repeat the following control
commands, 15 times per second, until the desired camera
position is reached: “Pan Right”, “Pan Right”, etc.
(ASCII codes: R a R a etc.) or
(HEX codes: 52 61 52 61 etc.)
To focus the lens on a closer object, repeat the following
control commands, 15 times per second, until the desired
focal length is attained: “Focus Near”, “Focus Near”, etc.
(ASCII codes: N a N a etc.) or
(HEX codes: 4E 61 4E 61 etc.)
1996R setup programming commands are not provided via
these codes. The optional software package 2050SW13 is
available for external setup programming from a PC.
Contact American Dynamics Applications Department for a
more detailed Applications note on ASCII remote control.
ASCII/HEX Codes for System Control
Command
ASCII
HEX
ACK
_
5F
ALARM NEW
E
45
ALARM OLD
G
47
ALARM CLEAR
I
49
AUX ON
A
41
AUX OFF
B
42
CALL SHOT
\
5C
CAMERA
#
23
CAMERA ARM
(
28
CAMERA HOLD
H
48
CAMERA DISARM
)
29
FOCUS FAR
F
46
FOCUS NEAR
N
4E
IRIS CLOSE
C
43
IRIS OPEN
O
4F
LENS TELE
T
54
LENS WIDE
W
57
LOCKOUT CAMERA
K
4B
MONITOR
M
4D
MONITOR ARM
[
5B
MONITOR DISARM
]
5D
NEXT CAMERA
+
2B
NO LOCKOUT
J
4A
PAN LEFT
L
4C
PAN RIGHT
R
52
PROGRAM
P
50
RUN SEQ
S
53
SALVO
$
24
SET SHOT
^
5E
TILT DOWN
D
44
TILT UP
U
55
ZERO
0
30
ONE
1
31
TWO
2
32
THREE
3
33
FOUR
4
34
FIVE
5
35
SIX
6
36
SEVEN
7
37
EIGHT
8
38
NINE
9
39
F1
%
25
F2
`
60
ASCII/HEX Codes for Command Terminators
Function
ASCII
HEX
KBD a
a
61
KBD b
b
62
KBD c
c
63
KBD d
d
64
cr
0D
A-10
APPENDIX