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During
the modernization project for some induction furnaces , manufacturers
of die-casting plungers had several good reasons to select the KS 98.
Initially,
it was only intended to update the control system to the latest technical
standards, but there were also a few supporting functions that would have
required the installation of a separate PLC.
- A
"traffic light" was to inform about the melting process in each furnace\line
(Temperature reached? Time for the metallurgical tests in the laboratory?
Sample o.k.? Can the crucible be removed? etc.).
- What
must be done when the crucible has been re-lined? A sintering program must
be executed, before the crucible is ready for use.
-
Control functions alone are not enough; how can the four transformer stages
be switched in accordance with the power demands?
Furthermore,
the process values of the melt temperatures were to be transmitted to the
existing process management system from PMA.
What
needed doing ??
The KS 98 combines all the above tasks in a single unit. The operator is informed
immediately about the process status; a ten-segment programmer uses a different
operating mode to condition the crucible lining for its demanding service;
together with prec ise DPID control, all transformer stages are switched according
to the required power; and finally, all the necessary data are transmitted
to the process management system. All of this is implemented with a minimum
of wiring expense, whereby the integrated visualization facility provides
the operator with comprehensive information in a clear and transparent manner
in spite of the multiple tasks.
... and the finishing touch:
During several days of "training on the job" the customer not only received
all the necessary information about the "internals" of the KS 98, the inputs/outputs
and the bits & bytes. The entire project was discussed, planned, programmed,
and tested with the Simulation Tool up to an operational solution.
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