Extron electronics Multi Video Processor MVP 104 Operations Instructions download pdf (Page 40)

Programmer’s Guide

MVP 104GX Programmer’s Guide

5-2

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.

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).

x.xx

DB9 Pin Locations

Female

REMOTE

RS-232/RS-422

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 53 54

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Extron electronics Multi Video Processor MVP 104 Operations Instructions Page 40

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