PLC
(Programmable Logic Controller)
DCS is also a system integrator for applying Programmable
Logic Controllers (PLC) to emulate conventional mechanical
relaying schemes, develop protective and annunciation functions,
and develop static excitor controls and refreshers.
| PLC
Dragline Control Upgrades |
The
Programmable Logic Controller has been used in
the mining industry for about 15 years. The PLC
takes the place of mechanical relays, time delay
relays, and a host of other electrical control
functions that are routinely performed on a dragline.
It also provides for more precise applications
such as shoe synchronization, hoist and drag limits,
boom tightline protection, production monitors,
and lube systems.
Unlike the mechanical relays, there are no moving
parts on a PLC. Therefore, the reliability of
the system is increased while maintenance needs
are decreased.
With the introduction of remote I/O systems on
PLC's, the wiring of remote devices such as limit
switches, resolvers, and RTD's, is significantly
reduced. This decreases both the cost of materials
and manpower necessary for the installation of
the system. |
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| PLC
Dragline Lube Control Upgrades |
| Conventional Lube System Control
timers and relays can be replaced with PLC
systems which provide improved relability/repeatability
and monitoring along with ease of system modifications. |
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| PLC Dragline Remote Drum Control |
This system aids with rope change
maintenance. The system provides movement of
either drum from the machinery house, where
rope change takes place.
Positioning of the drum, which is critical, can
be performed by maintenance personnel as opposed
to communicating to the operator to start/stop
over radios in a high noise environment. |
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| Operator Interface |
Human
Man Interface
Man to Man Interface
Operator Terminal |
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