Connection and addressing notes
- Protocol
- Modbus
- Data bits
- 8
- Error check
- CRC
- Character format
- each 8-bit byte carries two hex characters
- Function codes
- 01 read relay status, 03 read words, 04 read words, 05 write relay
- Parameter size
- 32-bit value read as two 16-bit words
Registers in the map: 48. function 3 (holding registers). byte order big-endian. data types: dword.
| MODBUS offset | Description | Units | Data type | Scale |
|---|---|---|---|---|
| 0 | Voltage phase, v l1 | V | dword | ×0.1 |
| 2 | Current, a l1 | A | dword | ×0.001 |
| 4 | Active power, kw l1 | W | dword | |
| 6 | Reactive power, kvar l1 | W | dword | |
| 74 | Apparent power, kv a l1 | dword | ||
| 8 | Power factor, pf l1 | dword | ×0.01 | |
| 10 | Voltage phase, v l2 | V | dword | ×0.1 |
| 12 | Current, a l2 | A | dword | ×0.001 |
| 14 | Active power, kw l2 | W | dword | |
| 16 | Reactive power, kvar l2 | W | dword | |
| 76 | Apparent power, kv a l2 | W | dword | |
| 18 | Power factor, pf l2 | dword | ×0.01 | |
| 20 | Voltage phase, v l3 | V | dword | ×0.1 |
| 22 | Current, a l3 | A | dword | ×0.001 |
| 24 | Active power, kw l3 | W | dword | |
| 26 | Reactive power, kvar l3 | W | dword | |
| 78 | Apparent power, kv a l3 | W | dword | |
| 28 | Power factor, pf l3 | dword | ×0.01 | |
| 80 | Temperature, c | deg C | dword | ×0.1 |
| 30 | Active power iii, kw iii | W | dword | |
| 32 | Inductive power iii, kvarl iii | W | dword | |
| 34 | Capacitive power iii, kvarc iii | W | dword | |
| 36 | Cos iii, cos iii | dword | ×0.01 | |
| 38 | Power factor iii, pf iii | dword | ×0.01 | |
| 40 | Frequency, hz | Hz | dword | ×0.1 |
| 42 | Voltage line l1-l2, v12 | V | dword | ×0.1 |
| 44 | Voltage line l2-l3, v23 | V | dword | ×0.1 |
| 46 | Voltage line l3-l1, v31 | V | dword | ×0.1 |
| 48 | % thd v l1, %thd vl1 | % | dword | ×0.1 |
| 50 | % thd v l2, %thd vl2 | % | dword | ×0.1 |
| 52 | % thd v l3, %thd vl3 | % | dword | ×0.1 |
| 54 | % thd a l1, %thd al1 | % | dword | ×0.1 |
| 56 | % thd a l2, %thd al2 | % | dword | ×0.1 |
| 58 | % thd a l3, %thd al3 | % | dword | ×0.1 |
| 66 | Apparent power iii, kvaiii | W | dword | |
| 68 | Maximum demand, md (pd) | w/VA/mA | dword | |
| 70 | Three-phase current (average, a_avg | A | dword | ×0.001 |
| 72 | Neutral current, in | A | dword | ×0.001 |
| 82 | Maximum demand a2, md (pd) | A | dword | ×0.001 |
| 84 | Maximum demand a3, md (pd) | A | dword | ×0.001 |
| 60 | Active energy, kw h iii | W | dword | |
| 62 | Inductive reactive energy, kvarl h iii | W | dword | |
| 64 | Capacitive reactive energy, kvarc h iii | W | dword | |
| 86 | Apparent energy, kva h iii | W | dword | |
| 88 | Active energy generated, kw h iii (-) | W | dword | |
| 90 | Inductive energy generated, kvarl h iii (-) | W | dword | |
| 92 | Capacitive energy generated, kvarc h iii (-) | W | dword | |
| 94 | Apparent energy generated, kva h iii (-) | W | dword |