The thesis describes the design and construction of a local
area computer network to provide a distributed industrial control
and monitoring system for glass container manufacture. In
particular, a commercially available local area network, originally
manufactured to link industrial programmable controllers, has been
used to allow the implementation of multi-processor control scheme
for container forming and to achieve an integrated data processing
link with other plant computers concerned with inspection and
quality data collection.
A microprocessor-based I.S. machine controller was designed
to replace conventional Timing Drum controllers used in many
container manufacturing plants, and linked to the local area
network. The control system developed provided the usual machine
sequencing functions but also provided adaptive control of the
invert mechanism speed using a specially designed electropneumatic
servo mechanism valve. A data capture system was also designed, developed and tested
to allow' on-line monitoring of container inspection machines. The
system utilises the local area network to provide access to a file
server (for data storage), to allow remote access (e.g. in Quality
Control) and to establish a link with the I.S. machine controllers.
The distributed control and monitoring scheme produced allows
the convenient integration of other data processing functions in
other plant areas such as batch, furnace, forehearth, and packing
and can facilitate the integration of organisational functions such
as planning, scheduling, and data base management in a planned step
by step manner.
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy of Loughborough University.