Data Sheet
Table Of Contents
- 1.1 Introduction
- 1.2 MODBUS functions
- 1.3 Application notes
- 2 TABLES
- 2.1 Data format representation In Carlo Gavazzi instruments
- 2.2 Geometric representation
- 2.3 Maximum and minimum electrical values in GNM3D SERIES
- 2.4 Instantaneous variables and meters (grouped by variable type)
- Instantaneous variables and meters (grouped by phase)
- 2.5 Firmware version and revision code
- 2.6 GARO identification code
- 2.7 Programming parameter tables

GNM3D and GNM3T Series Communication Protocol
9
2.4 Instantaneous variables and meters (grouped by variable type)
MODBUS: read only mode with functions code 03 and 04 Table 2.4-1
Modicom
address
Physical
address
Length
(words)
VARIABLE
ENG. UNIT
Data
Format
Notes
300001
0000h
2
V L1-N
INT32
Value weight: Volt*10
300003
0002h
2
V L2-N
INT32
300005
0004h
2
V L3-N
INT32
300007
0006h
2
V L1-L2
INT32
300009
0008h
2
V L2-L3
INT32
300011
000Ah
2
V L3-L1
INT32
300013
000Ch
2
A L1
INT32
Value weight: Ampere*1000
300015
000Eh
2
A L2
INT32
300017
0010h
2
A L3
INT32
300019
0012h
2
kW L1
INT32
Value weight: Watt*10
300021
0014h
2
kW L2
INT32
300023
0016h
2
kW L3
INT32
300025
0018h
2
kVA L1
INT32
Value weight: VA*10
300027
001Ah
2
kVA L2
INT32
300029
001Ch
2
kVA L3
INT32
300031
001Eh
2
kvar L1
INT32
Value weight: var*10
300033
0020h
2
kvar L2
INT32
300035
0022h
2
kvar L3
INT32
300037
0024h
2
V L-N sys
INT32
Value weight: Volt*10
300039
0026h
2
V L-L sys
INT32
300041
0028h
2
kW sys
INT32
Value weight: Watt*10
300043
002Ah
2
kVA sys
INT32
Value weight: VA*10
300045
002Ch
2
kvar sys
INT32
Value weight: var*10
300047
002Eh
1
PF L1
INT16
Negative values correspond to exported active
power, positive values correspond to imported
active power.
Value weight: PF*1000
300048
002Fh
1
PF L2
INT16
300049
0030h
1
PF L3
INT16
300050
0031h
1
PF sys
INT16
300051
0032h 1 Phase sequence INT16
The value –1 corresponds to L1-L3-L2
sequence, the value 0 corresponds to L1-L2-
L3 sequence. The phase sequence value is
meaningful only in a 3-phase system
300052
0033h
1
Hz
INT16
Value weight: Hz*10
300053
0034h
2
kWh (+) TOT
INT32
Value weight: kWh*10
300055
0036h
2
Kvarh (+) TOT
INT32
Value weight: kvarh*10
300057
0038h
2
kW dmd
INT32
Value weight: Watt*10
300059
003Ah
2
kW dmd peak
INT32
Value weight: Watt*10
300061
003Ch
2
kWh (+) PARTIAL
INT32
Value weight: kWh*10
300063
003Eh
2
Kvarh (+) PARTIAL
INT32
Value weight: kvarh*10
300065
0040h
2
kWh (+) L1
INT32
Value weight: kWh*10
300067
0042h
2
kWh (+) L2
INT32
Value weight: kWh*10
300069
0044h
2
kWh (+) L3
INT32
Value weight: kWh*10
300071
0046h
2
kWh (+) t1
INT32
Value weight: kWh*10
300073
0048h
2
kWh (+) t2
INT32
Value weight: kWh*10
300079
004Eh
2
kWh (-) TOT
INT32
Value weight: kWh*10
300081
0050h
2
kvarh (-) TOT
INT32
Value weight: kvarh*10
300091
005Ah
2
Run hour meter INT32
Value weight: hours*100, only GNM3T series










