RS-232 Control, 1 RS-232 Interface, Status

DESIGNER SOLUTIONS

7.2 RS-232 CONTROL

The UT250-101has many advanced remote-control capabilities accessible through standard RS-232 communication. Control may be accomplished through a computer, control system, or any device capable of RS-232 communication.

7.2.1 RS-232 INTERFACE

The control commands for the UT250-101, are in a simple ASCII character format.

1.Square brackets “[ ]” are part of the command.

2.Use uppercase letters for all commands.

3.Spaces are not legal characters.

Commands instruct the UT250-101to perform specific actions or request information. Some commands do both simultaneously. A command that instructs the UT250-101only to perform an action will generate feedback of “[ ]”. The open bracket immediately followed by a closed bracket indicates the card received a valid

command. If the command requested information, the feedback generated by the UT250-101is the acknowledgement of having received a valid command. Invalid commands generate feedback that includes “ERR” plus an error code.

Example: [ERR001]

Error number

Commands ending in “S” will be saved into memory. Commands not ending in “S” will still be executed, but will not be restored when the system is reset or powered off, then on.

7.3 DESCRIPTION OF COMMANDS

Each command consists of a function name and an optional unit ID. Unit IDs are required if 2 or more UT250-101s are to be controlled individually over the same RS-232 bus. The unit ID can be changed using the [SID] and [RSI] commands that are described later.

Example: [ONU2]

ON = Function

U2 = Unit ID (only U2 executes ON)

Unit ID “U0” does not need to be included at the end of a command string.

Example:

[ON]:	Executed by U0
[ONU0]:	Executed by U0

NOTE: Examples in this manual assume the unit ID is U0 and do NOT include the unit ID. If needed, the unit ID for any unit can be specified at the end of the command string as shown above.

1.[STATUS]

This command displays the status of the unit. Command Format: [STATUS]

Example:

Send the command [STATUS] to receive feedback similar to the following:

Note: Preset connections are displayed as already executed, but do not take effect until after the [SW] switch command is executed.

OUT 1A - IN 1 ON

OUT 1B - IN 1 ON

OUT 2A - IN 1 ON

OUT 2B - IN 1 ON

AUDIO OUT - IN 1 ON

AUTO_SWITCH - OFF

If there is no card in slot 4, sending the [C4] command will not return any feedback.

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