Z Systems rdq-6 Instruction Manual - Command Strings
rdq-6 instruction manual
z-systems audio laboratories
25
appendix D: rdq-6 automation protocol
In order to be seamlessly integrated with today's high-end home theater systems, the rdq-6 is
controllable via an RS-232 or RS-422 serial signal. This Appendix outlines the control protocol
for the rdq-6. Before continuing, the reader should be familiar with the hexadecimal (base 16)
and binary (base 2) number systems. The control strings are shown in hexadecimal
representation denoted by ##h (where ## is the hexadecimal byte).
•
Automation Port Reconfiguration
The port on the rear panel of the rdq-6 can be configured to accept either RS-232 signals or
RS-422 signals. The rdq-6 comes configured for RS-422 signals from the factory due to the
improved performance of the protocol. To change this setting follow the instructions below:
•
Turn the unit off and remove the power cord.
•
Remove the eight screws that fasten the lid to the chassis. You will find four on the
top of the lid and for along the edges of the bottom of the lid.
•
Position the unit so that it is right side up and the back panel is facing you.
•
Slide the lid towards you and away from the chassis of the unit.
•
Locate the ribbon cable that extends from the back panel's DB-9 connector to the
right edge of the display circuit board. You will notice that it is plugged into the
bottom connector on the edge of the display circuit board. This is the RS-422
connector.
•
To set the unit to receive RS-232 input, plug this ribbon cable to the top connector on
the edge of the display circuit board.
•
To finish the procedure, install the lid and fasten all eight screws.
•
Replace the power cord and turn the unit on.
•
Command Strings
The rdq-6 has a set of 17 commands that control the various functions of the unit. These
commands must be sent in a certain order, or protocol, in order to be decoded by the rdq-6.
The protocol string is outlined in the table below.
Command
Command
Description
Description
FFh
Open communications with rdq-6
D6h
rdq-6 Identification String
00h
rdq-6 address
word1
Main control word (see below for word1 values)
word2
Optional data word (see below for word2 values)
EEh
Close communications with rdq-6
This protocol basically defines the start and end of communication with the rdq-6. If more
than a single parameter has to be sent, the user should send them in series before closing the