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This extrusion press was moved from Southern California
to Eastern Washington by Kaiser Aluminum. The existing controls
for the press were Allen-Bradley PLC 2 based with standard pilot
devices for operator controls. This system was abandoned for a
new Allen-Bradley ControlLogix platform.

ControlLogix PLCs allow for seamless network integration. Four
processors provide the control architecture. Linear transducers
and proximity switches replaced mechanical limit switches. Transducers
replaced pressure switches to allow better control and accurate
data logging. The RSView32 control station provides real time
data to the SQL server that tracks each extrusion and total production
for each work order. The operator is required to provide downtime
tracking if the system goes offline. The operator and the amount
of down time is logged with a single key entry. Local control
panel PCs log data into the central SQL database using RSView32's
data log function via Ethernet. The database generates the daily
reports for production and downtime in PDF format and emails these
reports to key personal. The production superintendent may recall
historical data from the database for later evaluation.
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