Modular Power Meter
Modular power meter version 1.0 Page 17 / 40
- reactive power measurements (Q)
- cos(φ) measurements (Cosphi)
- power factor measurements (PF)
- current distortion measurements (Ithd)
- apparent power measurements (S)
For all these measurements, several values are available:
- actual value in 32-bit floating point, the actual value is the value measured in the last
second
- actual value in 16-bit floating point
- mean value in 16-bit floating point over the last interval
- maximum value in 16-bit floating point over the last interval
- minimum value in 16-bit floating point over the last interval
The sensors calculate the mean, maximum and minimum values for each measurement over
a minute. These are stored for the last 15 minutes. Then it calculates the mean, maximum
and minimum values over an interval. The length of the interval can be set (see 6.3.6). It is a
value in minutes ranging from 1 to 15.
The master table is only available on the first sensor on the bus.
Value Format Measurement Register Address Range
Actual value float32 U, Uthd, F 0x0000-0x00FF
I 0x0100-0x01FF
P 0x0200-0x02FF
Q 0x0300-0x03FF
Cosphi 0x0400-0x04FF
PF 0x0500-0x05FF
Ithd 0x0600-0x06FF
S 0x0700-0x07FF
Actual value float16 U, Uthd, F 0x1000-0x10FF
I 0x1100-0x11FF
P 0x1200-0x12FF
Q 0x1300-0x13FF
Cosphi 0x1400-0x14FF
PF 0x1500-0x15FF
Ithd 0x1600-0x16FF
S 0x1700-0x17FF
Mean value float16 U, Uthd, F 0x2000-0x20FF
I 0x2100-0x21FF
P 0x2200-0x22FF
Q 0x2300-0x23FF
Cosphi 0x2400-0x24FF
PF 0x2500-0x25FF
Ithd 0x2600-0x26FF
S 0x2700-0x27FF
Maximum value float16 U, Uthd, F 0x3000-0x30FF
I 0x3100-0x31FF
P 0x3200-0x32FF
Q 0x3300-0x33FF
Cosphi 0x3400-0x34FF
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