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directly in the field close to operating devices, and then be
connected to the OC 6000e network via the optic fiber or shielded
twisted pair wire. This reduces field wiring runs and saves system
installation expense.
Hot-swap capability and comprehensive diagnostics expedite
maintenance and reduce downtime. Replacement of I/O modules
can be performed under power and will not interrupt the operation
of other modules. Modules are keyed to ensure they are always
replaced with the correct module type.
I/O power supplies can be implemented with 1:1 redundancy.
To further ensure continued operation, the user can program
fail-safe modes for the I/O. For example, the user can program
modules to hold a predetermined signal value, or hold the last
good value on loss of communication with the Distributed
Processing Stations.
System Functions
The OC 6000e DCS provides a suite of system functions to aid
efficient unit operation, including:
• Engineeringtoolsforgraphics,database,controllogic,
reporting and guide
• Displayforcontrol,trends,alarm,points,group,etc.
• Dataloggingincludingvariouslogssuchasposttrip,
operator action, and alarm
System Security
System access control is central to plant safety and, therefore,
is a core design feature of the OC 6000e DCS. Access to system
functions are secured through four user authority levels: super
Alarm Card
Alarm List
Alarm History
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I/O Module