AccuEnergy Accuvim II User Manual - page 34
Ethernet Modual
Fun
Byte count
Data
01H
01H
02H
The content of the data is,
7
6
5
4
3
2
1
0
0
0
0
0
0
0
1
0
MSB LSB
（
Relay 1 = OFF , Relay 2=ON
）
Table 3-6 Read 2 Relays Status Response Message
2) Read Status of DI (Function Code 02)
Function Code 02
1=On
0=Off
There are 38 DIs in Acuvim II, and the start address is 0000H.
The following query is to read the 4 DIs Status of address 1 of Acuvim II.
Query
Transaction
identifier hi
Transaction
identifier lo
Protocol
identifier hi
Protocol
identifier lo
Length hi Length lo
Unit
identifier
00H
00H
00H
00H
00H
06H
01H
Fun
Data start reg hi Data start reg lo
Data #of regs hi
Data #of regs lo
02H
00H
00H
00H
04H
Table 3-7 Read 4 DIs Query Message
Response
The response includes MBAP Header, function code, quantity of data