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PTU-D300 User’s Manual (v2.18.0) COMMAND REFERENCE

page 11

4 COMMAND REFERENCE

This section describes the pan-tilt unit command set. Each command has a section that

provides a brief functional description, a format (syntax) description, examples, and related

topics. When controlling the pan-tilt unit from a terminal, a complete menu of pan-tilt commands

can be obtained by entering the character “?”.

4.1 Binary Command Format

A C Programmer’s Interface (model PTU-CPI) is available for higher bandwidth binary

communications between a host computer and the PTU controller.

4.2 General ASCII Command Format

When describing the format (syntax) of pan-tilt commands, the following conventions are

adopted:

• Commands issued to the pan-tilt unit (e.g., typed in by you) are shown in bold.

• Input characters may be in upper or lower case (we show them in upper case for

presentational consistency)

• A delimiter (<delim>) can be either a space (“ ”) or a carriage return (<CR>).

• A successfully executed command returns “*<CR>”. Successful query execution returns

“* <QueryResult><CR>”. Command execution failure returns

“! <ErrorMessage><CR>”. A pan axis limit hit asynchronously returns “!P” and a tilt

axis limit hit asynchronously returns “!T”.

4.3 Positional Control Commands & Queries

4.3.1 Position (absolute)

Description:

Specify or query the absolute pan or tilt axis position. Desired positions can

be changed on-the-fly without waiting for previous position commands to

complete.

Syntax

Query current absolute pan position: PP<delim>

Set desired absolute pan position: PP<position><delim>

Query current absolute tilt position: TP<delim>

Set desired absolute tilt position: TP<position><delim>

Example

The following sends the pan axis to the left, waits, then sends it to the right:

PP-2500 *

A *

PP * Current Pan position is -2500

PP2500 *

A *

PP * Current Pan position is 2500

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