Could it be possible that the boards are locking up at boot, before the
watchdog timer is initialized?
On 10/23/2011 9:25 AM, naturalwatt wrote:
Hi.
We have several dozen TS7250, and several hundred TS7550 deployed
around the UK. Despite the presence on both boards of watchdog timers,
some units sometimes lock up and have to be power cycled. This is
pretty rare, and not reproducible in the workshop, but a real nuisance
none the less. Most boards run for years, others lock up every few weeks.
Do others have the same experience? Is it likely to be due to noise on
the mains? Why doesn't the watchdog operate as it should? Is a cheap
surge-suppression filter socket likely to help?
Should I implement my own watchdog using a PIC and a spare DIO line?
Is this likely to be more reliable than the onboard watchdog?
Los of questions!
Martin
smime.p7s
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