Remote operation – Extron Electronics IN1408 User Manual
Page 38
36
© 2002 - INLINE, Inc.
IN1408 Operation Manual - V1.4 3/21/02 12:32 PM
Remote Operation
RS-232 CONTROL
The IN1408 RS-232 serial control port accepts serial commands from a control system, computer
serial port, or any other device capable of sending out serial ASCII commands at compatible baud
rates. A complete listing of RS-232 codes is included on the following pages.
Communication Protocol:
8 data bits
1 stop bit
No parity check
9600 baud (factory default setting)
Baud Rate Selection:
The IN1408 has a factory default baud rate of 9600 bps and can communicate at baud rates from 1200
up to 57,600. Baud rates can be selected using the Advanced Menu (see page 23).
Á
Note:
The baud rate transmitted must match the baud rate selected on the IN1408
Command Code Structure and Delimiters:
All commands sent to the unit must contain a leading code, the command code, and an ending code.
Each command must be completely executed before the unit will accept a new command.
INLINE scalers can be set to recognize six sets of leading and end codes (delimiters) when using an
RS-232 remote: parentheses ( ), brackets [ ], braces{ }, slashes \ /, less and greater than < >, and
signs !#. The factory default serial delimiters are [ ].
Note: Only the IN1408 that has the same delimiters as the remote controller will respond.
A complete command consists of:
[
The leading code
CH3
The command code.
]
The ending code
Example: [CH3] commands the IN1408 to select channel 3.
Serial Control Cable Wiring
When controlling only one IN1408 unit, connect the RS-232 cable as follows:
Controller Transmit
to
IN1408 Receive
Controller Ground
to
IN1408 Ground
Controller Receive
to
IN1408 Transmit
When controlling multiple IN1408 units, connect the RS-232 cable as follows:
Controller Transmit
to
Each IN1408 Receive
Controller Ground
to
Each IN1408 Ground
Controller Receive
to
Only one IN1408 Transmit
Key Concept
When controlling multiple units, the Controller Receiver Terminal must con-
nect to only one IN1408 Transmit Terminal. Multiple IN1408 Transit Lines
may not be connected together; otherwise signal contention from multiple
units will result. Therefore, “receive” information is only available from one
IN1408 in this configuration. Each unit must be set to different delimiters.