Knoll GSZ67 User Manual download pdf (Page 7)

RS232 Connection

The RS232 connection is used to control the GSZ67 by an external controller or

computer and can work with our without keypads. The GSZ67 connects to the RS232

controller with a 9-pin db9 connector. The programming reference follows.

1.0 Terminal Settings

To control the GSZ series amplifier via other control systems, connect a RS-232 cable to the

serial control connector on the rear of the GSZ unit and set your computer’s or control unit port

settings to match the following configuration:

SETTING VALUE

Bits per second 19,200

Data bits 8

Parity None

Stop bits 1

Flow control None

Emulation Auto detect

1.1 Command Summary

All commands are enclosed in parentheses. The request can be in some cases a read request

(followed by a “?”), or a write request (followed by 0-2 ASCII digits). A read command will return

the current setting, and write command will change the setting.

Read request format: (nAA?) where:

( starts the command

n denotes amplifier channel (if required)

AA denotes the command (may be 1 or 2 letters)

? denotes the read request

) ends the command

Read Request Example 1.1:

Function Command Response

Volume (1vl?) returns the volume on channel 1 (0-87)

Write request format (nAA$$) where:

( starts the command

n denotes the amplifier channel (if required)

AA denotes the command (may be 1, 2 or 3 letters !!)

$$ denotes the value to be written if required (leading zero’s ARE necessary)

) ends the command

Write Request Examples 1.2:

Function Command Response

Turn Channel On (1on) turns on amplifier channel 1 on

Select Input (1sl7) turn amplifier channel 1 to input 7

Set Volume (1vl50) turn amplifier channel 1 to volume 50

(of 87)

Supported Commands

Command Summary

# = numerical zone or amplifier channel value

$$ = second numerical value (may be one or two digits)

1 2 3 4 5 6 7 8 9 10 11 12 ... 15 16

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Knoll GSZ67 User Manual Page 7

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