On Thu, 11 Aug 2011, Malte R?temann wrote:
Date: Thu, 11 Aug 2011 10:47:39 +0200
From: "Malte [iso-8859-1] R?temann" <[email protected]>
Reply-To: "Enhanced Machine Controller (EMC)"
<[email protected]>
To: [email protected]
Subject: [Emc-users] Mesa 7i43 hostmot and EMC2 exit
Hello,
my Mesa card works very nice and everything goes fine till I close Axis.
When I close axis, EMC2 shuts down and all output pins on the mesa card go
high and the spindle starts working...
How can I change this behavior? Floating or low output after the exit from
EMC2?
Yes, the proper solution is to use active low outputs to enable external
equipment (7I43 manual page 18). This is because the only definable pin state
on the 7I43 before it is configured is high (pulled up).
If you have a spindle solid state relay it should be turned on by a low 7I43
output not high. This can be accomplised by wiring the SSR + lead to 5V from
the 7I43 card and the - lead to a 7I43 output, and setting the 7I43 output
that drives the SSR to open-drain mode
Thanks
Malte
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Peter Wallace
Mesa Electronics
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