Copyright 2010 SPLat Controls Pty Ltd. This communication does not
constitute professional advice
SPLat/PC 32-bit - new release.
release of SPLat/PC, V10.21.2, has been causing a few users some
grief. The program creates a number of file folders and files for
its own internal use (for example the .ini file and a startup log
file). We tested it all inhouse on everything from XP 32-bit to
Windows 7 64-bit and had no problems. That hasn't stopped users
having problems, of course! Murphey is alive and well.
we've been banging away to fix it up, and have just released
V10.21.3. This version attempts to tow the Party (a.k.a Microsoft)
line about where applications should and should not create "private"
files. If the operating system does resist, the program will
generate an error message on the screen and then carry on (rather
than just crash out).
on up and get your copy here, and
please, please, report any problems along with your
operating system details.
control - Stuff about or related to control
When not to trust the
Modern electronics are extremely reliable, especially if
well designed and used correctly. Nevertheless, silicon chips
contain features smaller than the wavelength of light, and control
programs contain many thousands of lines of program code.
Electronics can (and do!) fail, be it due to electrical failure or
Would you bet your life on the
electronics not failing? I wouldn't, and I make the
Any industrial machine that can hurt people
should be fitted with safety cutouts and interlocks. The most common
safety measure is the emergency stop, sometimes called E-stop or
mushroom switch. On conveyors it would be a rope switch. It could
also be a fence or physical guard barrier with a safety switch.
These are wired so that if activated they immediately remove power
from the machine or otherwise inhibit it from making a dangerous
Do not ever even think of wiring the safety
switch to the controller and having the controller stop the machine.
Always wire the safety switch directly into the machine in
accordance with safety design rules in your location. If the safety
switch has an auxiliary contact, by all means wire that into the
controller so it can know what has happened and not get upset, but
do not expect the controller to make safe.
Do not treat this as expert advice. If you are in the
least bit of doubt, consult an
control - Nothing much to do with controls, (but
How do transistors
us who have been through some formal education in electronics will
have been presented with explanations of how bipolar transistors
work. In some case we will have been fed a bunch of equations with
no "gut" feel. In other cases we will have received descriptive
explanations that didn't quite seem to make things very clear.
recently discovered a website that contains a very nice, and quite
believable, description of the internal workings of a transistor by
William Beatty, BSEE. Bill argues that they are not current
controlled as popularly believed, but voltage
controlled. It makes sense to me. You can see Bill's description
Have you seen our easy to
digest Finite State Machine
I will be adding something about this in my blog..
I hope you don't mind me borrowing one of your diagrams. I thought they were cute. Harold Ennulat, MN, USA
Harold's blog entry
Q: How do you drive an engineer
A: Tie him to a chair, stand in front of him,
and fold up a road map the wrong way...
With most men, unbelief in one thing
springs from blind belief in another.
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