78
6
. Detailed settings for communications
6.2 Modbus (continued)
Command/Response example
The following is an example of an instruction for clearing the active energy.
(Communication address: When H’01)
Command code: "03" Related information: "00"
Command
Response
■
Echo back test (08: H’08)
Command frame
Response frame
• Start writing address
Set "0000" as the address for the echo back test.
• Test data
This is any data in 2-byte HEX format.
Commu
nication
address
Function
code
Start writing
address
Written data
CRC-16
01
06
FFFF
0300
891E
Commu
nication
address
Function
code
Start writing
address
Written data
CRC-16
01
06
FFFF
0300
891E
Commun
ication
address
Function
code
Start writing
address
Test data
CRC-16
H’08
H’00
Fixed
Fixed
1
1
2
2
2
Commun
ication
address
Function
code
Start writing
address
Test data
CRC-16
H’08
H’00
Fixed
Fixed
1
1
2
2
2
