Remote Operation; Rs-232 Control - Extron electronics IN1402 User Manual

Remote Operation

Rs-232 control

The IN1402 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 next two pages.
Baud Rate and Protocol:
•
1200-57600 baud
•
9600 baud (default)
•
8 data bits
•
1 stop bit
•
no parity
Baud Rate Selection:
The IN1402 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 by selecting Advanced Menu on the Main Menu.
The baud rate transmitted must match the baud rate selected on the IN1402.
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 [ ].
Only the IN1402 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] sets the IN1402 to select channel 3.
Serial Control Cable Wiring:
When controlling only one IN1402 unit, connect the RS-232 cable as follows:
•
Controller Transmit to IN1402 Receive
•
Controller Ground to IN1402 Ground
•
Controller Receive to IN1402 Transmit
When controlling multiple IN1402 units, connect the RS-232 cable as follows:
•
Controller Transmit to each IN1402 Receive
•
Controller Ground to each IN1402 Ground
•
Controller Receive to only one IN1402 Transmit
16 IN1402 User's Manual