Energy Meter Manual

<Toc> <Ind> < 6. Modbus/TCP Communication Protocol>
6-7
IM 77C01E01-10E
06 Writes data into D register
● Function
This function code writes data into a specified D register number.
• The maximum number of D registers to be written into at a time is 1.
• For the format of response in the event of failure, see subsection 6.4.4.
● Request (for nomal operation)
Element
Number of bytes
Command
element
MBAP Header
22 2 2211
Hex value
Arbitrary 0000 0006
01 to 99 06
PDU
Unit ID
Function
code
Transaction ID Protocol ID
Register
start number
Write data
Number of
bytes
● Response (for normal operation)
01 to 99
Element
Number of bytes
Command
element
MBAP Header
22 2 2211
Hex value
Arbitrary 0000 0006 06
PDU
Unit ID
Function
code
Transaction ID Protocol ID
Register
start number
Write data
Number of
bytes
● Example
Write 5 (500Wh/pls) into the D0209 (pulse unit) at station number 01.
[Request] 000100000006010600D00005
(1) “0001”: Arbitrary 2-byte data (2) “0000”: Protocol ID=0000 (fixed)
(3) “0006”: Number of bytes (4) “01”: Unit ID=01 indicating PR300
(5) “06”: Function code=06 (6) “00D0”: D register number 209
(7) “0005”: Write data
The following response will be returned to the request above.
[Response] 000100000006010600D00005
(1) “0001”: Arbitrary 2-byte data in the request
(2) “0000”: Protocol ID=0000 (fixed) (3) “0006”: Number of bytes
(4) “01”: Unit ID=01 indicating PR300 (5) “06”: Function code=06
(6) “00D0”: D register number 209 (7) “0005”: Write data
* Numbers in quotation marks are hexadecimal.
(1) (2) (3) (6) (7)(4) (5)
(1) (2) (3) (6) (7)(4) (5)