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
204 Vbn Vbr Reserve x100
208 Vry Reserve Reserve x100
212 Vbr Reserve Reserve x100
222 Avg. I Avg. I Reserve x100
To Next Page
Loading...
