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The Scan
System
The Scan
System is free of any ties to PLC/RTU vendors so it does not
play any favourites with respect to communications protocols.
A number of scan tasks for proprietary protocols exist as a
standard part of the product e.g. for Modbus, Alley Bradley
DH+ and Ethernet Interfaces. An OPC scan task is also
available as standard so the adJile™
mSupervisor can
interface to any of the wide range of devices for which an OPC
driver is available.
Writing
scan tasks is an activity that is well supported by the
product and a number of vendors have developed them. This is
particularly important for legacy systems and situations where
optimum performance is required.
Information about scan devices (addresses, communications
protocols etc.) is kept in a branch of the database dedicated
to the scan system. Keeping this information separate from the
plant data points means that the plant data and the structure
of the objects that contain it are independent from the type
of scan device. Consequently the plant objects are the same
even if data is scanned from different scan devices or if the
type of the scan device changes because of a field upgrade.
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- mSupervisor
