AccuEnergy Acuvim II series - Page 323

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6.4.2 Physical Layer
The physical layer supported by DNP3.0 must transmit or receive data in serial
mode. The data unit transferred will be 8 bits in length.
The port must be asynchronous half-duplex RS-485.
The data format supporting 8 bit data, 1 start bit, 1 stop bit, no parity.
The baud rate can be set to any supported value.
6.4.3 Data Link Layer
The Acuvim II Series Power Meter always acts as a Slave device .The device
address can be set from 0 to 65534. The link layer comply with the stand FT3
frame format. The xed length user data eld is behind the xed head. The link
layer supports Reset Link, Reset User and Read Link Status. In order to ensure
the stability of communication, it is recommended that you should better reset
the link and reset the user before communicate with the Acuvim II Series Power
Meter.
The function code supported as follows:
Reset Link ( 0X00 ), Reset User ( 0X01 ), Link Status ( 0X09 ).
FT3 Frame Format:
An FT3 frame is dened as a xed length header block followed by optional data
blocks. Each block has a 16-bit CRC appended to it. The header fields consist
of 2 start octets, 1 octet length, 1 octet control, a destination address, a source
address and a 16-bit CRC appended to it.