AMX AXB-PT15 POSITRACK CAMERA CONTROLLER Instruction Manual download pdf (Page 50)

Programming

AXB-PT10/15/30 PosiTrack Camera Controllers

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.

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

"$1B,'C',0,27,17,13", use:

{

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.

RS-232 Send_Strings

"'27,18,0'" Clears the ninth data bit to 0 for all subsequent characters to be transmitted. It is used

in conjunction with the 'B9MON' command.

"'27,18,1'" Sets the ninth bit to 1 for all subsequent characters to be transmitted. It is used in

conjunction with the 'B9MON' command.

"'27,19,<time>'" Inserts a delay before the next character to be transmitted.

Variable:

time = 1 - 255 in 1 millisecond increments

"'27,20,0'" De-asserts RTS hardware handshake output high.

"'27,20,1'" Asserts an RTS hardware handshake output low.

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.

General Format

Byte No. Type

1 Attention Byte

2 Command #

3Data

Last Checksum, sum of all bytes Mod 256

RS-232

Levels

Level Range Direction

0 PAN 0-255 To PT

1 TILT 0-255 To PT

2 ZOOM 0-255 To PT

3 FOCUS 0-255 To PT

1 ... 49 50 51 52 53 54 55 56

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AMX AXB-PT15 POSITRACK CAMERA CONTROLLER Instruction Manual Page 50

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