Function block
EMMTR
P_INST
Q_INST
Reset Energy counter
DmdWh
SupWh
DmdVArh
SupVArh
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Figure 45: Function block
Functionality
The energy monitoring function EMMTR is used to calculate the active and reactive
energy from the respective power inputs P and Q.
Operation principle
The operation of EMMTR can be described using a module diagram.
Energy
calculation
SupWh
Reset Energy
counter
P
Q
DmdVArh
DmdWh
SupVArh
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Figure 46: Functional module diagram
Energy Calculation
Based on the measured powers, the linear average of the active and reactive energies
over a preset time interval of 500 ms is calculated.
The accumulated forward and reverse active energy value is available at DmdWh and
SupWh and the accumulated forward and reverse reactive energy value is available at
DmdVArh and SupVArh, respectively.
The binary signal RESET ENERGY COUNTER from external IED is used to reset the
accumulation.
Signals
Table 48: EMMTR Input signals
Name
Type Default Description
P_INST REAL - Measured active power
Q_INST REAL - Measured reactive
power
RESET ENERGY
COUNTER
BOOLEAN - Reset of accumulated
energy reading
1MRS757488 H Section 6
Commissioning
RIO600 81
Installation and Commissioning Manual
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