Re: [foxboro] system error in sequences
- From: dirk.pauwels@xxxxxxxxxx
- To: foxboro@xxxxxxxxxxxxx
- Date: Wed, 25 Aug 2010 16:27:44 +0200
Hi Doug,
That could well be the case, this pressure xmttr is used by a lot of ind's
and calc's. In that case it'll be difficult to solve this probably, other
than extending the exception to sys-error or exception to manual I guess.
I'll do some more testing on it.
Thanks
Dirk
"Douglas G. Lloyd" <doug@xxxxxxxxxxxxxxx>
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25/08/2010 15:30
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Re: [foxboro] system error in sequences
Here's another possible reason for the intermittent sequence errors: If
multiple sequences are trying to access the same parameter from different
CPs, they can collide every now and then and cause an access error. This
can happen with a read or a write, since even a read function appears to
temporarily "secure" the parameter. It's generally not a problem if
multiple sequences in the same CP access the same parameter since they
really can't execute simultaneously. But, no guarantees peer-to-peer.
Regards,
Doug Lloyd
DGL Controls
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