Beluk BLR-CM Modbus, Техническая документация инструкция

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Technical Documentation
BLR-CM Modbus Rev. 05
2018-09
12
Address Value Words Type Unit
0 Frequency 2 FLOAT Hz
2 Voltage phase – phase 2 FLOAT V
4 Voltage phase - neutral 2 FLOAT V
6 Current I1 2 FLOAT A
18 Apparent power S-sum 2 FLOAT VA
26 Active power P-sum 2 FLOAT W
34 Reactive power Q-sum 2 FLOAT var
42 Lacking reactive power ΔQ 2 FLOAT var
50 Power factor (P/S) 2 FLOAT -
58 Total harmonic distortion THD U 2 FLOAT %
60 Harmonics U 1. order = fundamental wave 2 FLOAT %
62 Harmonics U 2. order 2 FLOAT %
64 Harmonics U 3. order 2 FLOAT %
… … … … …
122 Harmonics U 32. order 2 FLOAT %
124 Total harmonic distortion THD I 2 FLOAT %
130 Harmonics I 1. order = fundamental wave 2 FLOAT %
132 Harmonics I 2. order 2 FLOAT %
134 Harmonics I 3. order 2 FLOAT %
… … … … …
192 Harmonics I 32. order 2 FLOAT %
322 Ambient temperature 2 FLOAT °C
3.4 Work counters
In order to reach an accurate value, work counters/accumulators are arranged in a special way. Each counter consists
of two parts:
1. A FLOAT-type base counter which simply accumulates/integrates the power. If this counter reaches 1000000.0,
the extended counter is increased by one and 1000000.0 is subtracted from the base counter.
2. A LONG-type extended counter, which is used to count portions of MW / Mvar up to (2
32
-1)

10
6
.
To get the real work value, the extended counter must be multiplied with 1000000 and afterwards the base counter
value must be added. This keeps the precision of the FLOAT-type base counter in acceptable range, because huge values
can be handled as well.