EIB Delta-Meter
Electricity Meters
23
ABB i-bus
®
EIB
The sending behaviour of the communication objects “Instantaneous power”
is defined in the parameter window “Instantaneous power”.
Send instantaneous active/reactive power: If “yes” is selected, the
instantaneous power is transmitted on the bus.These values are updated
every 8 seconds.
Send reading on change of more than +/-: The instantaneous power is
sent via the ABB i-bus
®
EIB as a 2 byte telegram (also 4 byte for reactive
power). In order to reduce telegram traffic, e.g., in installations where the
energy consumption frequently fluctuates around an average value, the
instantaneous power is only sent when there is a defined change compared
to the last sent value. The size of this change can be set as a parameter.
In the setting +/- 0 W (var), the new value is sent every 8 seconds.
Note: With large set values, the current instantaneous power can differ
considerably from the last sent value.
After a reset or a restoration of the bus voltage, the instantaneous power will
also only be sent on the EIB once the set difference value has been
exceeded.
Reactive power to be sent as: Since the reactive power can be
represented as both a positive value (inductive) and a negative value
(capacitive), the combination meter also sends the reactive power type in
addition to the measured value of the instantaneous power. In the setting
“EIS 10 (2 byte value) and EIS 1 (sign)”, the polarity information is
transmitted with a separate 1 bit telegram via the communication object
“Reactive power type”. If the setting “EIS 11 (32 bit signed integer)” is
selected, the power and the polarity information are sent in the form of a
single 4 byte telegram.
4.6 Parameter window:
Instantaneous power
Default settings are highlighted
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