Omron KM-N3-FLK, Руководство пользователя

Страница: 76 / 106

76
6
. Detailed settings for communications
6.2 Modbus (continued)
Response frame
• Start writing address
The start writing address that was received.
• Number of elements
The number of elements that were received.
• CRC-16
This is a check code calculated from the communication address until the data immediately preceding.
Refer to "An example for CRC-16 calculation" for the calculation. (

71)
Command/Response example
The following shows an example of writing when changing the phase and wire type to 1-phase 2-wire.
(Communication address: When H’01)
Address: H’2000 Written data: H’00000000
Command
Response
Commu
nication
address
Function
code
Start writing
address
Number of
elements
CRC-16
H’10
1 1 2 2 2
Commu
nication
address
Function
code
Start writing
address
Number of
elements
Byte
Counter
Data 1 Data 1 CRC-16
01 10 2000 0002 04 0000 0000 6A6E
Commu
nication
address
Function
code
Byte
Counter
Number of
elements
CRC-16
01 10 04 0002 DD00