- HP Hood LLC Projector User Manual

RS-232 protocol reference

RS-232 Protocol Reference

RS-232 connections

This guide describes how to configure the projector for RS-232 communication with

an external controller, and describes the RS-232 command keywords used to send

requests to the projector.

Cable connections

Use an RS-232 cable to connect a controller to the projector’s D-sub 9-pin connector.

The table below lists the connector’s pin outputs.

✎

When connecting a computer to the projector, use a null-modem cable.

Communication settings

Make sure the controller device uses the following settings for RS-232

communication with the projector.

❏ 9600 baud

❏ 1 start bit + 8 data bits (D0 = LSB, D7 = MSB) + 1 stop bit

❏ no parity

❏ full duplex communication channels (no flow control)

❏ no handshaking

D-Sub 9-Pin Connection

Pin Signal Direction

3 TxD data from projector to controller

2 RxD data from controller to projector

5GND —