stamp life expectancy
I'm thinking of using a BSP40 for an industrial control.· The·stamp would be running constantly 24/7 monitoring temperatures and activating relays.· Is there any problem with·running a stamp·microcontroller continuously?
In the·past·I've only used stamps·for small·projects where·most of the times the unit is turned off.
Thanks,
Frank
In the·past·I've only used stamps·for small·projects where·most of the times the unit is turned off.
Thanks,
Frank
Comments
I'm sure others have used it in long-duration runs.
On the hardware side, take care for what will happen in case of blackouts or brownouts and protect the wiring from ESD and from sources of spikes that might reset the processor. Give adequate protection from spills and accidents and possible miswiring of external cables. Battery backup if necessary. The usual industrial stuff.
On the software side, take care for modal loops, loops where your program could get stuck waiting for an input that never comes. For example, if a sensor becomes unplugged or defective, or a serial string does not arrive, that should not be allowed to lock up the whole program.
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Tracy Allen
www.emesystems.com
It has never required a reload of the program or stopped working.
No problem with using the Stamp in industrial projects. I've got some Stamp based units which have been on and running 24/7 since late 1996 without any issues, including power failures, nearby lightning activity, etc.
Take care with the field devices connected (use opto's or clamp diodes, etc) and stay within ratings of any relays, transistors, etc.
Cheers
The system basically monitors various machines to "detect" if they are ON or not. If any one machine is ON, then the vacuum system turns ON
immediately via a 40A relay connected to a BS2. When ALL machines are OFF the vacuum system continues to run for approximately 5 min before
turning itself OFF. As far as writing to EEPROM, this system also keeps histogram data as to which machines are most frequently used.
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Beau Schwabe
IC Layout Engineer
Parallax, Inc.
Post Edited (Beau Schwabe (Parallax)) : 7/19/2006 4:30:53 PM GMT