A necessity for CMX systems that demand uninterrupted control, monitoring,
and historization of data, the RDX Redundancy Control module for CMX
features two completely redundant CMX systems with single or dual I/O
configurations.
Utilizing a standard master/slave architecture, the two systems are in
continuous communication with all I/O while maintaining an ongoing, diagnostic
monitoring link.
Under normal running conditions Continuous and
Sequence
Control, Continuous and Unit History, and Alarm and Message Status run on the
Master CMX system. Meanwhile the Slave CMX system serves as an online hot-backup
with full mirroring of data history and an operator interface function capable
of monitoring and modifying setpoints and control changes in a manual mode. In
the event the Master CMX system is interrupted, the Slave CMX system, which
always runs in parallel with the Master while monitoring its status and inputs,
automatically becomes the new Master .
A manual switch-over is also possible: the Slave system becomes the new
Master automatically designating the Master as the new Slave system.
The RDX Redundancy Control module features:
Dual fully-redundant computers with single or redundant sets of I/O.
The ability to monitor and modify data from both the Master and
Slave systems.
Full Continuous and Unit History on both the Master and Slave systems.
Full Alarm and Message monitoring on both the Master and Slave system.
Configurable Slave function allows for control of continuous control
algorithm on an individual basis.
