Extron electronic MVP 104GX manual Programmer’s Guide, Remote Control Port RS-232/RS-422

Programmer’s Guide

Remote Control Port (RS-232/RS-422)

The MVP 104GX RS-232/RS-422 port connector is used to connect to a host or external controlling device, such as a computer or control system which can generate the proper command codes and recognize the MVP 104GX responses.

5 1

RS-232/RS-422

REMOTE

96

DB9 Pin Locations

Female

The MVP 104GX comes from the factory configured for RS-232. To set the

MVP 104GX for RS-422 operation, see “Configuring the MVP 104GX for

RS-422” in the appendix.

The RS-232/RS-422 connector is a 9-pin D female (see illustration above) with the following pin designations:

Pin	RS-232	Description	RS-422	Description
1	—	not used	Tx(-)	Transmit data (-)
2	Tx	Transmit data	Tx(+)	Transmit data (+)
3	Rx	Receive data	Rx(+)	Receive data (+)
4	—	not used	Rx(-)	Receive data (-)
5	Gnd	Signal ground	Gnd	Ground
6	—	not used	—	not used
7	—	not used	—	not used
8	—	not used	—	not used
9	—	not used	—	not used

The protocol is 9600 baud, 8-bit, 1 stop bit, no parity, and no flow control.

Commands and responses for programming the MVP 104GX from a host system connected to the RS-232/RS-422 port are listed on the following pages.

Host-to-MVP 104GX Communications

The MVP 104GX accepts SIS™ (Simple Instruction Set™) commands through the RS-232/RS-422 port. SIS commands consist of one or more characters per command field. They do not require any special characters to begin or end the command character sequence. Each MVP 104GX response to an SIS command ends with a carriage return and a line feed (CR/LF = ), which signals the end of the response character string. A string is one or more characters.

MVP 104GX-initiated messages

When a local event occurs, such as a front panel operation, the

MVP 104GX responds by sending a message to the host. The MVP 104GX- initiated messages are listed below (underlined).

(c) Copyright 2000, Extron Electronics, MVP 104GX, Vx.xx

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