Power Measurement ION 8000 Series - Additional Information

ION 8000 Series User Guide Demand Forgiveness
Chapter 9 - Demand Page 121
Additional Information
NOTE
To function properly, the Demand Forgiveness feature requires firmware v230 or greater, and the
Demand Forgiveness framework which is found in these or more recent templates: 1.8.0.0.0 (ION 8500),
1.7.0.0.0 (ION 8400), and 1.3.0.0.0 (ION 8300).
The following points are important to note:
 The following demand input values are zero for kQ, kW, kVA, and kVAR during
the Demand Forgiveness period:
 Delivered
 Received
 Delivered + received
 Delivered – received
 Q1, Q2, Q3, Q4
 If a new peak is set prior to a power outage, it will persist.
 Even though demand is zero during the Demand Forgiveness period, a new
peak could be set if the demand was very high prior to the power outage, or
after the Demand Forgiveness period ends.
 Demand Forgiveness works for auxiliary and blade powered meters.
 All ION modules in the Demand Forgiveness framework are fully locked.
 If a Demand Forgiveness period is initiated, and another power outage occurs
that is less than the time specified in the Minimum Outage Duration setting, then
the Demand Forgiveness period continues. If a second outage is greater than
the time specified in the Minimum Outage Duration setting, then the Demand
Forgiveness period restarts.
 Both the power outage downtime and the Demand Forgiveness downtime are
stored within the Demand Forgiveness framework. The Store modules preserve
a timestamp that is viewable in Vista.
 The Sliding Window/Rolling Block demand module Update Rate setup register
must be set to E
VERY SECOND (default).
 If Demand Forgiveness is enabled on an auxiliary-powered meter and there is
no power on the blades, then the meter assumes that this is an outage. When
power is applied to the blades, demand is forgiven for the specified time.
 If Demand Forgiveness is enabled and the meter is unplugged for servicing or
other reasons, then the Demand Forgiveness framework assumes there was an
outage and demand is forgiven for the specified time.
 For meters where Demand Forgiveness is enabled at the factory (e.g. RMICAN
Canadian revenue meters), demand will not be measured when the meter is first
put into service. Instead demand is forgiven for the specified time.