Chauvet CH-258 User Manual download pdf (Page 8)

Appendix

DMX Control Mode

Operating in a DMX Control mode environment gives the user the greatest flexibility when it comes to

customizing or creating a show. In this mode you will be able to control each individual trait of the

fixture and each fixture independently. The LEDrain™38 uses 7 channels of control.

Note: Dipswitch 10 must be turned on to activate DMX control mode.

Note: Older 8-dipswitch version must have dipswitch 8 turned off to activate DMX control

mode. Dipswitches 1-7 set the DMX address, and the maximum address is 127.

Setting the DMX address

This DMX mode enables the use of a universal DMX controller device. Each fixture requires a "start

address" from 1 to 511. A fixture requiring one or more channels for control begins to read the data

on the channel indicated by the start address. For example, a fixture that occupies or uses 7 channels

of DMX and was addressed to start on DMX channel 100, would read data from channels: 100, 101,

102, 103, 104, 105 and 106. Choose start addresses so that the channels used do not overlap and

notate the start address selected for future reference.

If this is your first time addressing a fixture using the DMX-512 control protocol than I suggest jumping

to the Appendix Section and read the heading “DMX Primer”. It contains very useful information that

will help you understand its use.

Set the start address using the group of DIP switches located usually on bottom of the fixture. Each

dip switch has an associated value. Adding the value of each switch in the ON position will provide

the start address. Determining which switches to toggle ON given a specific start address can be

accomplished in the following manner. By subtracting the largest switch value possible from the

selected start address until zero is achieved.

XAMPLE STARTING ADDRESS

Address 10

Pin # 4 = 8

Pin # 2 = 2

Total = 10

Address 24

Pin # 5 = 16

Pin # 4 = 8

Total = 24

Resolving address using

simple math.

Address 233

233 – (128) = 105, Turn ON Dip # 8

105 – (64) = 41, Turn ON Dip # 7

41 – (32) = 9, Turn ON Dip # 6

9 – (8) = 1, Turn ON Dip # 4

1 – (1) = 0, Turn ON Dip # 1

You will most likely use the first

available number which maybe

number 1. This number was

selected for example purposes.

IP SWITCH (DMX VALUE)

128

7 8

128

LEDrain™38 User Manual 8

2007-11-28/10:08

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