Cloud DCM-1 User's Guide download pdf (Page 54)

DCM-1 User Manual v1.0

Appendix

RS232 Serial Control

The rear panel RS232 Serial Interface provides serial control

of almost every DCM-1 function, parameter and setting. The

DCM-1 appears as a DCE device to controlling equipment.

The full RS232 protocol is beyond the scope of this manual,

but can be downloaded from www.cloud.co.uk.

This section provides only details of the port parameters

and an abridged serial command list, which comprises the

normal User controls.

Pinout

The rear panel connector is a D9F. The pinout is shown in

the table:

PIN FUNCTION

1 n/u

2 Data receive

3 Data transmit

4 DTR

5 0v

6 DSR

7 RTS

8 CTS

9 n/u

Not all control systems interpret “Tx” and “Rx” the same

way, and the installer should check whether pins 2 and 3

(and 7 and 8 if used) should be “crossed” within the cable.

The installer should also check whether the control system

being used requires RS232 ow control to be implemented,

and if so, whether hardware control or software control is

used. Hardware ow control (sometimes called RTS/CTS)

requires pins 7 and 8 (at the DCM-1 end) to be connected.

CONTROLLER

DCM-1

RxRx

CTSCTS

RTS

Connect if hardware

flow control is

required

RS232 connection

Port parameters

PARAMETER VALUE/SETTING

Data type: RS232C serial

Data speed 300/1200/2400/4800/9600/19200 baud, software

selectable

Word length 8 bits

Parity None

Stop bits One

Abridged command set

The commands listed in the table below are the equivalent

of the operating controls available in User Mode. For all

other commands, data requests and responses, please refer

to the DCM-1’s full RS232 protocol document.

GENERAL FORMAT

FUNCTION COMMAND (ASCII)

Route Input x to Zone y <Zy.MU,Sx/>

Set audio level in Zone y to -mdB <Zy.MU,Lm/>

Reduce audio level in Zone y by pdB <Zy.MU,LDp/>

Increase audio level in Zone y by qdB <Zy.MU,LUq/>

Enable Group z <Gz,E/>

Disable Group z <Gz,D/>

Enable paging to Zone y (see Example 4) <PM,PAy/>

Release paging <PM,PR/>

Examples

1) Input Selection

The values of x and y in the general format are the Input No.

(1 to 8) and the Zone No. (1 to 8) respectively.

EXAMPLE COMMAND

Select Input 3 in

Zone 6

ASCII <Z6.MU,S3/>

HEX 3C 5A 36 2E 4D 55 2C 53 33 2F 3E

2) Zone Levels

Levels can either be set to an absolute value (in dBs), or

increased/decreased by a specied number of dBs.

For absolute levels, the number of dBs corresponds to

attenuation rather than gain, thus 0dB is maximum level

and at ‑62dB the zone is muted. The values of y and m

in the general format are the Zone No. (1 to 8) and the

attenuation level in dBs (0 to 62) respectively.

To alter the Zone level by a specied amount, the additional

ASCII characters ‘U’ (up) or ‘D’ (down) are added to the

string. The values of y, p and q in the general format are the

Zone No. (1 to 8), the level increase in dBs (0 to 62), or the

level decrease in dBs (0 to 62) respectively. A command to

increment the level by a number of dBs greater than the

current attenuation will set the level to maximum. Similarly,

a command to decrement the level by a number of dBs

greater than (62 minus the current attenuation) will mute

the Zone output.

EXAMPLE COMMAND

Set level in Zone

2 to -12dB

ASCII <Z2.MU,L12/>

HEX 3C 5A 32 2E 4D 55 2C 4C 31 32 2F 3E

Reduce level in

Zone 1 by 10dB

ASCII <Z1.MU,LD10/>

HEX 3C 5A 31 2E 4D 55 2C 4C 44 31 30 2F 3E

Increase level in

Zone 5 by 6dB

ASCII <Z5.MU,LU6/>

HEX 3C 5A 35 2E 4D 55 2C 4C 55 36 2F 3E

1 2 ... 49 50 51 52 53 54 55 56 57 58 59 ... 67 68

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Cloud DCM-1 User's Guide Page 54

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