Satec expertmeter EM720, Руководство по эксплуатации

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Chapter 5 Configuring the EM720 Configuring Communication Protocols
EM720 Power Quality and Revenue Meter 125
The number of event setpoints for each static object type is
specified via the
DNP Options setup.
NOTE
The device clears all event buffers and links the default set of
static points to each event object type every time you change
the number of points for any of the objects.
To define setpoints for selected static points:
1. Check the “Ext” box if you wish to use the extended
point list.
2. Select a parameter group and then a desired
parameter for each event point.
3. For AI and BC points, select a relation and an
operating threshold or a deadband to be used for
detecting events. All thresholds are specified in
primary units. The following relations are available:
• Delta – a new event is generated when the absolute
value of the difference between the last reported point
value and its current value exceeds the specified
deadband value;
• More than (over) - a new event is generated when the
point value rises over the specified threshold, and
then when it returns below the threshold minus a
predefined return hysteresis – applicable for AI
objects;
• Less than (under) - a new event is generated when
the point value drops below the specified threshold,
and then when it returns above the threshold plus a