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Production Data Collection and Processing Systems
| IPACT worked
with a large food manufacturer to design a
standard approach for the buffering of
production data in PLCs and collection of that
data into an intermediate computer system (Data
Collection and Forwarding Systems or DCFS). Two
important features were included in this
design: the ability to ride through a temporary
loss of the DCFS system, and interlocking
between the PLC buffer and the DCFS that
guaranteed one and only one read of each piece
of production data by the DCFS. The DCFS then
does some pre-processing on the data (e.g. units
conversion), and stores it in a SQL database to
await transmission to the plant's MIS computer
system. This approach has been adopted
company-wide, and IPACT has already installed it
at several sites and is in the process of
installing it at others. |
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