Revision 1 - Printed
April 10, 1997
15" Plus Manual
16
FAN CONTROL FROM DMX
With Modes 3-7, it is possible to control the fan from the DMX data
input to the scroller. With '
Fast
' operation (Mode 6), all fans are
controlled by DMX address 511. With 2 and 3 channel control, each
fan has its own address.
Important points when using DMX fan control are:
Once modes 3-7 are selected, the HI/LO fan switch on the
Rainbow is disabled.
Control is reverse-proportional such 00%=Full and FF=OFF.
This can be reversed by a jumper setting on the pcb if needed.
This is useful if fan levels are to be patched in with light intensity.
A thermal sensor will override the fan control and bring the fans
on to maintain an acceptable operating temperature on the pcbs.
If no DMX data is present for the address selected, the fans will
default to full speed.
The selected fan speed is indicated on the data light on the base
of the Colour changer. This can be disabled in software if
required.
Fan control can be changed from proportional control to externally
controlled HI / LO selection via externally reprogrammable
software.