Rs-232 Send_Strings; Stand-Alone Rs-232 Protocol - AMX AXB-PT15 POSITRACK CAMERA CONTROLLER Instruction Manual

Programming

RS-232 Send_Strings

PosiTracks have special Send_String escape sequences. If any of the three-character combinations
listed below are found anywhere within a Send_String program instruction, they are treated as a
command and not the literal characters.
RS-232 Send_Strings
"'27,18,0'"
"'27,18,1'"
"'27,19,<time>'"
"'27,20,0'"
"'27,20,1'"
In 485 mode, if the delay escape code characters are the last in the Tx buffer, the 485
Tx output will tri-state at the beginning of the delay.
If you need to send a string containing sequences "27,17," "27,18," "27,19," or "27,20," use two
Send_String commands. The first containing characters up to and including "27", the second
beginning with "17", "18", "19", or "20", and all subsequent characters.
To send the string
{
SEND_STRING <dev>,'"$1B,'C',0,27"'
SEND_STRING <dev>,'"17,13"'
}

Stand-Alone RS-232 Protocol

The stand-alone RS-232 protocol (in the General Format table) is used when the PosiTrack is
configured for external stand-alone RS-232 mode. See the Pre-Installation and Installation sections
for details on setting internal jumpers, device number DIP switch, and RS-232 wiring.
General Format
Byte No.
1
2
3
Last
RS-232
Levels
0
1
2
3
44
Clears the ninth data bit to 0 for all subsequent characters to be transmitted. It is used
in conjunction with the 'B9MON' command.
Sets the ninth bit to 1 for all subsequent characters to be transmitted. It is used in
conjunction with the 'B9MON' command.
Inserts a delay before the next character to be transmitted.
Variable:
time = 1 - 255 in 1 millisecond increments
De-asserts RTS hardware handshake output high.
Asserts an RTS hardware handshake output low.
"$1B,'C',0,27,17,13"
Type
Attention Byte
Command #
Data
Checksum, sum of all bytes Mod 256
Level
PAN
TILT
ZOOM
FOCUS
, use:
Range Direction
0-255 To PT
0-255 To PT
0-255 To PT
0-255 To PT
AXB-PT15 PosiTrack Camera Controller