Delta Din-rail Power Meter DPM-D520I User
Manual
5-82
_5
The following is packet format of Response sent by Modbus Slave (The part before Byte Count is same as
Modbus RTU. The sequenced data of 1
st
~10
th
THD is shown below, address is 0x700, with a total of 40bytes
for data lenth.)
Slave Response
0x01
0xFE
0x28
1st THD 2nd THD
10th THD
Slave
Address
Function
Code
Byte
Count
1
st
to 10
th
THD
CRC
…
Note:
The total data length of address 0x702, 0x705, 0x708, 0x70B, 0x70E and 0x711 is 44 bytes.
Example B (Data Log):
If Modbus Master such as PLCs or data collectors reads recorded data from the meter
with function code 0xFE in Modbus address 0x800, the Request packet format sent by Modbus Master would
be as follows. (Same as Modbus RTU, but Number of Points must be 1)
0x01
0xFE
0x08
0x00
0x00
0x01
CRC
Slave
Address
Function
Code
Start
Address
(Hi)
Start
Address
(Lo)
Number of
Points(Hi)
Number of
Points(Lo)
Master Request
The following is packet format of Response sent by Modbus Slave (The part before Byte Count is same as
Modbus RTU. The sequenced log data of 3 continuous intervals is shown below. If N parameters are selected,
the total data length will be 3*(6+4N) bytes):
Slave Response
0x01
0xFE
3*(6+4N) 1st interval 2nd interval 3rd interval
Slave
Address
Function
Code
Byte
Count
Data Log of 3 intervals
CRC
Содержание DPM-D520I
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