SMP Gateway User Manual • 163
17 The SMP Gateway’s
Automation Functions
Because it is connected between the substation devices and the control centers, the SMP Gateway
is well positioned to implement advanced processing functions that would be impossible to
perform by less sophisticated devices.
The SMP Gateway provides the following automation capabilities:
The SMP Automation Functions module, which add basic automation functions.
See “The SMP Gateway Automation Functions Module”, next.
The Soft PLC module and CoDeSys development platform, which allow the creation of
sophisticated automation scripts, such as closing circuit breakers and load balancing.
See “The Soft PLC”, pa
ge 176.
17.1 The SMP Gateway Automation Functions
Module
The SMP Gateway Automation Functions module is an optional software package designed to
extend the capabilities of existing devices by adding local automation capabilities similar to what
could be implemented using an external PLC. The module adds the following functions to the
SMP Gateway:
The Analog Control function, which performs a control operation on a physical analog
output point, based on the value change of a physical input point. Basically, it writes the value
of an input point to an output. A deadband value, in engineering units, can be specified so that
only changes that exceed the deadband value will trigger a control operation. A time filter, in
milliseconds, can be applied to value changes of the source point, to prevent control
operations from being triggered on transitions of short duration.
The Best Of function, which makes a logical input or output point an exact replica of the best
source point available of the same type. The evaluation of the best source point is based on
quality. An exact replica involves the support for redundant devices: value or state, the quality
and the timestamp. Furthermore, if the “best of” operation involves output points, the
requested command is sent to the best source point.
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