XPERT-PRO – Operational Manual
TRINITY
[26]
Modbus RTU on RS485 Port
In order to download live data for the various system parameters, user can use
RS485 connecting to SCADA or EMS software. XPERT-PRO supports an RS485 port
with MODBUS-RTU protocol. The station ID for every meter is site selectable, and so
is the baud rate. The data which can be read using MODBUS query # 3 (Read
Holding Registers) is provided in an address map, with the applicable multiplication
factors, vide
Appendix.
Communication line parameters: 4800 or 9600 or 19200 /8/N/1.
The register map is described in Appendix. All addresses are in decimal whose
parameters are unsigned long. If illegal address is sent in query or host, try to read
more than 254 bytes of data in one query exception message is generated. The
parameters name, address and multiplication factor are also mentioned.
Reserved values are for future uses which are transmitted as zeroes. Please refer to
the address map for the various parameters in Appendix.
Appendix
Address
3P4W
3P3W
1P2W
MF
200
Vrn
Vry
Volts
x100
202
Vyn
Reserve
Reserve
x100
204
Vbn
Vbr
Reserve
x100
206
Avg. Vpn
Reserve
Reserve
x100
208
Vry
Reserve
Reserve
x100
210
Vyb
Reserve
Reserve
x100
212
Vbr
Reserve
Reserve
x100
214
Avg. Vpp
Avg. Vpp
Reserve
x100
216
Ir
Ir
Amps
x100
218
Iy
Reserve
Reserve
x100
220
Ib
Ib
Reserve
x100
222
Avg. I
Avg. I
Reserve
x100
224
Reserve
Reserve
Reserve
226
Reserve
Reserve
Reserve
228
Reserve
Reserve
Reserve
230
Frequency
Frequency
Frequency
x100
232
System PF
System PF
System PF
x1000
234
PF_R
Reserve
Reserve
x1000
236
PF_Y
Reserve
Reserve
x1000
238
PF_B
Reserve
Reserve
x1000
240
System KW
System KW
System KW
x100
242
System KVAR
System KVAR
System KVAR
x100
