Communication
RS485 CONNECTION
The industrial standard RS-485 communication port option is also available ENTITY.
This option makes it possible for a user to select ENTITY to provide power and
energy information into a variety of existing or new control systems and
communication networks such as EMS/PLC/SCADA.
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. ENTITY supports an RS485
port with MODBUS-RTU protocol. The station ID for every meter is site
selectable. 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: 9600/8/N/1.
The register map is described below. All addresses are in decimal. Parameter is
Unsigned long format. If illegal address is sent in the query or the host tries to
read more than 2 bytes of data in one query, exception message is generated.
The parameters name, address and multiplication factor are also mentioned.
Appendix
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