mpec SA380-IT, Руководство пользователя

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% change in
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% change is
configurable 5%
% change in
the lower
value of
a R
B
nd R
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% change is
configurable 5%
% change in
R
E
% change in
R
E
is
configurable
5%
Any change
is Status NA
% Change:
A acquisition is made when the last measurement made by the hardware differs by more than from the reading at the % change n%
time of the last acquisition.
For example, if at start up. a value of R = 100 k, and the change threshold is set to 5%, then a acquisition will not be take
N
% change
place until a reading <= 95 k, or >= 105 k is made.
Delayed acquisition:
60 seconds after any of the above acquisitions takes place, a further delayed acquisition is made to ensure that the EAMS knows that
the readings are stable and representative.
The 60 second time-out period is user configurable.
2.10.3 Buffering
Queue
Every time an acquisition takes place, if is placed in a first-in, first-out (FIFO) message queue. This message queue resides in
non-volatile memory and will not be erased when the SA380-IT powers-down.
The SA380-IT will attempt to empty this queue whenever a successful connection to an EAMS exists.
When the queue becomes full, the oldest entries are over-written.
The user can empty the queue at any time.
The queue has enough room for approximately 130,000 acquisitions. This is at least 1.5 days of data at absolute maximum
acquisition rates, or 9 months of data at a stable installation. Your mileage may vary.
Batching
When using MIMOSA communication the SA380-IT will hold-off the transmission of data until one of the following conditions becomes
true.
>= 1024 entries are pending in the queue.
>=60 seconds has elapsed since a message was last transmitted.
This is to economise transmission bandwidth and server resources.