Energy Meter Manual
4-10
<Toc> <Ind> <4. PC Link Communication Protocol>
IM 77C01E01-10E
WRW
Writes data into D registers on a word-by-word basis in random order
● Function
This function code writes register information specified for each register into the registers
specified in a random order by the specified number of words.
• The number of words to be written at a time is 1 to 32.
• For the format of response in the event of failure, see subsection 4.1.2.
• The command shown below includes the checksum function. When performing
communication without the checksum, do not include the 2-byte checksum element in
the command.
● Command/Response (for normal operation)
Write information is specified in a 4-digit character string (0000 to FFFF) in hexadecimal.
ddddn: repetition of register numbers and write information of the specified number
of words
ddddn = character string in hexadecimal
n = 1 to 32 words
Number
of Bytes
Command
element
1
STX
2
Station
number
(ST-NO)
2
Number
of words
(n)
5
Register
number
1
1
Comma
or
space
1
Comma
or
space
1
Comma
or
space
1
Comma
or space
5
Register
number
2
5
Register
number
n
2
01
3
WRW
4
dddd1
4
dddd2
4
ddddn
1
0
…
…
2
Checksum
1
ETX
1
CR
Command (continued)
Number
of Bytes
Response
element
1
STX
2
Station
number
(ST-NO)
2
01
2
OK
2
Checksum
1
ETX
1
CR
● Example
Write 1 into the remote reset (register symbol: RMT RST) and active energy reset (register
symbol: kWh RST) of the PR300 at station number 01.
The register number for remote reset is D0400.
The register number for active energy reset is D0353.
[Command]
[STX]01010WRW02D0400,0001,D0353,000171[ETX][CR]
“OK” will be returned in response to the command above.
[Response]
[STX]0101OK5C[ETX][CR]