26
892 at this moment, the actual value if current power factor is 892 × 0.001 = 0.892.
8.8 Communication Value and Actual Value
To ensure that the meter keeps adequate accuracy bits when transmitting data, some of
real-time data registers of PMAC615 adopt some special methods, shown as following
sheet:
No.
Content
Communication Value
Actual Value
1
Current
Voltage
Secondary side
Communication value × calculation
factor × CT ratio
Using secondary side to transmit value can keep the calculation accuracy to the utmost
extent. Users must, during processing, pay attention to the corresponding CT ratio or PT
ratio.
8.9 List of Real-time Measurement Data Register
Register
Address
Definition
Description
40001
Current
Secondary current, calculation factor is 0.001.
Unit: Ampere
40002
Voltage
Secondary voltage, calculation factor is 0.01.
Unit: Volt
40003
Active power
Secondary
active
power,
calculation factor is 0.1.
Unit: Watt
The highest bit is
the
sign
bit.
Negative value
is
represented
by complement.
40004
Reactive power
Secondary
reactive
power,
calculation factor is 0.1.
Unit: Var
40005
Power factor
Calculation factor is 0.001.
40006
Frequency
Calculation factor is 0.01. Unit: Hz
Summary of Contents for PMAC615
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