Without specifics on the
unit types, the
console used, signal chain, what the units do SPECIFICALLY that is "messed up" it makes it a little
bit harder to diagnose. These are the things I would check.
Are they addressed correctly in the board? Are you sure you have the right
profile selected?
I know that some profiles in the
EOS software are designed to have certain addresses set to different levels automatically. For a mover it may set the pan and tilt to a home position automatically, but if something is misaddressed, it will be sending that same information to the fx wheel or similar. Since it is more than one
unit messing up, probably not this.
Check each
Unit for correct settings. Is the matching
profile you have in the board set (most elation units have an extended mode for example)? Is the
unit set to a sound activation mode? Is the
unit in a slave/master setting? Do you get control of each
unit if you
plug them in individually?
(as techieman suggested) Cable maybe the issue here, are you using 5 or 3 pin
DMX cable? Did you use some 3 pin MIC cable instead? There is a difference, most of the time you will not see anything bad happen, but every once in awhile something funky does happen. (It has to do with ohms / resistance / shielding and other things that I know about enough that I know it causes issues, but not enough to know what needs to happen.)
Something else to consider may be that you are extending your data
line farther than is suggested. 1000' is considered the farthest you can go TOTAL (including units) on a single
line of 120
ohm DMX cable (the standard).
http://www.dfd.com/dmxbasic.html
It could be that the
line is reflecting signal for some reason - a
terminator may help.
http://www.dfd.com/whyterm.html
DFD also has this to say (by Milton Davis)
"When absolutely everything in a
system doesn't work except for one piece of equipment, it's probably that one working thing that's causing all the other problems."
Good luck!