RS232 Connection

The RS232 connection is used to control the Q450RS by an external controller or computer and can work with our without keypads. The Q450RS connects to the RS232 controller with a 9-pin db9 connector. The programming reference follows.

Terminal Settings

To control the Q450RS amplifier via other control systems, connect a RS-232 cable to the serial control connector on the rear of the Q450RS 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

Command Summary

All commands are enclosed in parentheses. The request can be in some cases a read request (followed by a “?”), or

awrite 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)

AAdenotes the command (may be 1 or 2 letters)

? denotes the read request

)

 

ends the command

 

Read Request Example:

 

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)

AAdenotes 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:

 

Function

Command

Response

Turn Channel On

(1on)

turns on amplifier

 

 

channel 1 on

Select Input

(1sl4)

turn amplifier

 

 

channel 1 to input 4

Set Volume

(1vl50)

turn amplifier

 

 

channel 1 to

 

 

volume 50 (of 87)

Supported Command Summary

# = numerical zone or amplifier channel value

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

Function

Command

Range

Read/Write Remarks

Version

 

(vr?)

none

read only

Reset

 

(rx)

none

write only 1 second

Channel On

 

(#on)

1-4

write only

Channel Off

 

(#of)

1-4

write only

Mute

 

(#mu)

1-4

write only

Un-mute

 

(#um)

1-4

write only

Mute All

 

(amu)

none

write only

Un-mute All

 

(aum)

none

write only

Volume Request

(#vl?)

1-4

read only

Volume Set

 

(#vl$$)

1-4 / 0-87

write only

Volume All

 

(avl$$)

0-87

write only

Input Request

 

(#sl?)

1-4

read only

Input Set

 

(#sl$)

1-4 / 1-4

write only

Input Select All

 

(asl$)

1-4

write only

All Channels On

 

(aon)

none

write only

All Channels Off

 

(aof)

none

write only

All Channels Vol up (avlu)

none

write only Note 1

All Channels Vol dn (avld)

none

write only Note 1

Channel Vol up

 

(#vlu)

1-4

write only Note 1

Channel Vol down

(#vld)

1-4

write only Note 1

Bass adjustment

(#b$)

1-4 / 0-F

write only Note 2

Treble adjustment

(#t$)

1-4 / 0-F

write only Note 2

Display treble

 

(#b?)

1-4

read only

Display bass

 

(#t?)

1-4

read only

Note1: Volume up or down requests increase or decrease volume level by 5

Note 2: Treble and bass commands use hexadecimal values 0-F, default (flat) is 8.

Also, it is best to leave about a ½ second between commands, as some integrators may miss commands if they are entered too quickly.

All commands also send a message back to the terminal after they have been completed, so that it is easy to keep track of the previous commands that were sent.

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Knoll Q450RS manual RS232 Connection, Terminal Settings, Supported Command Summary

Q450RS specifications

The Knoll Q450RS is a standout workstation designed for modern office environments, where flexibility, functionality, and aesthetics converge. This desk exemplifies the blend of advanced technology and ergonomic design, catering to the diverse needs of today’s workforce.

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Another characteristic that sets the Q450RS apart is its durability. Constructed from high-quality materials, this workstation is designed to withstand the demands of daily use. The robust build ensures longevity, making it a sustainable investment for any office environment.

The Q450RS is also designed with user collaboration in mind. Its spacious surface area accommodates multiple devices and can easily support collaborative projects, whether in an open office or shared workspace. This adaptability highlights the desk’s role in fostering teamwork and innovation.

In conclusion, the Knoll Q450RS is a dynamic and versatile workstation that combines ergonomic functionality with modern design. Its adjustable height, cable management solutions, and durable construction make it an ideal choice for contemporary work settings. As organizations continue to prioritize employee health and collaboration, the Q450RS stands out as a forward-thinking solution for the modern workplace. With the Knoll Q450RS, companies can enhance productivity while creating an inspiring work environment.