Manual

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.