Extron Electronics IN31608 - Manual (Page 13)

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IN31608 OPERATION MANUAL - REV 1.6 1/4/01
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2001 - INLINE, Inc.
Projector Control Port
The projector control port can be used to control a piece of equipment via RS-232, RS-422 or RS-485. The
communication parameters of the port are set via the serial [PCPPxx] commands. The projector codes are stored in
non-volatile memory. This feature is enabled / disabled by the [PCP…] command. When the IN31608 performs
certain actions, a code is transmitted through the projector control port. Codes are sent as follows:
Input and Output Codes - Each input and output can store an ASCII or hex code that may be transmitted when a
switch is made.
1) If a switch is made where the output changes, the associated output code is sent. Then a delay
defined by the [PCPD…] command is implemented.
2) Regardless of changes in output, the associated input code is then sent.
Function Buttons -
Function Buttons F1, F2, F3 and F4 each hold two codes. One code is sent when the button is
activated (the LED turns on) and the other is sent when it is deactivated.
Recall Codes - When a memory is recalled, a code is sent. Codes can be stored for memories 1 through 16.
For test purposes it is possible to send the projector control codes through the serial control port as well as the
projector control port by first issuing the serial command [PCP2].
Serial Control Port
PROTOCOL
The IN31608 baud rate may be selected from 1200 to 19,200 baud with the serial [ACI] command.
9600 baud (default)
No Parity
8 data bits
1 stop bit
These settings are stored in non-volatile memory.
STRUCTURE
All commands sent to the unit must contain a leading character (identified by the command code), followed by the
actual command and an ending character (also identified by the command code). Each command must be completely
executed by the IN31608 before it will accept a new command. The IN31608 provides a response to all commands
received. If the IN31608 executes the command, the response is sent after the command execution. When a
command is executed, the unit provides the response [OK] to indicate that the command was received and executed.
Do not send a new command until the [OK] is received, otherwise there may be a conflict. The responses have the
same beginning and ending characters as the commands that elicited the responses. Some examples of responses are:
RESPONSE INDICATION
[OK]
Command received and executed
[INVALID COMMAND] Command as received does not exist
[INVALID PARAMETER] Parameter is out of range
[INVALID MODE] Command does not apply to current IN31608 mode
[GROUP CONFLICT] [CNF] command groups must be mutually exclusive
Some commands, such as the various [STAT] commands, have specific responses (see the Serial Control Command
Description section on the next page).