Martin Audio ENGINEER Betriebsanweisung PDF herunterladen (Seite 74)

Engineer 418 & 818 User Manual Page 74

Preset and Zone Communication Protocol

Introduction

As mentioned previously, the Engineer 418 and 818 can form part of a more complex system controlled via

either the RS232 port on the front or the RS485 port on the rear of the device, taking the place of the Engineer

remote. Systems such as AMX and Crestron can be programmed to control the same functions as the Engineer

remote; recalling presets, selecting zones and adjusting the zone volumes. This chapter describes a part of the

communications protocol used on the Martin Audio 418 and 818 v1.0.

Implementation of this protocol should only be done by professional installation engineers. Improper use can

result in device instability or, ultimately, device crashes. In this case, the firmware will have to be flashed

which will result in the loss of the project stored in the Engineer.

For this reason, it's recommended to backup your data before trying your protocol implementation. You can

do this from the Engineer control software, using a full downsync. Save the result to a file. If anything goes

wrong, try uploading this file into the device. For more information, please consult the official Engineer

software manual.

Connecting to the Engineer

The protocol described in this document can be used for both the RS232 (front) and RS485 (back) connections

on the device. Communication with the device is established with the following settings:

Baud rate: 19200

Data bits: 8

Parity: None

Stop bits: 1

Handshaking: RTS during send

Note that the RTS pin should be set to “on” a few milliseconds prior to the actual communication. Always

reset this pin to “off” when communication isn't taking place!

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Martin Audio ENGINEER Betriebsanweisung Seite 74