70
6
. Detailed settings for communications
6.2 Modbus
●
Data format
In the following explanations, values preceded by H' (as in H'02) indicate hexadecimal values.
The numbers under the frame sections are the number of bytes. Also, the transfer code is binary for Modbus.
■
Command frame
■
Response frame when normal
Silent
interval
Commu
nication
address
Function
code
Data
CRC-16
Silent
interval
3.5
characters
or more
1
1
2
3.5
characters
or more
Silent interval
A non-communication time of 3.5 characters worth of time or more
Communication address
•
Specifies the "Communication address" of this product.
•
Figures in hexadecimal format between H'01 to H'63 (01 to 99) can be set.
•
Specify H'00 to communicate to all at the same time.
There will be no response if this is specified however.
Function code
Code to indicate the type of command.
Data
Data text to match the function code.
CRC-16
Cyclical Redundancy Check
This check code is for the communication address until the end of the data.
Commun
ication
address
Function
code
Data
CRC-16
1
1
2
Communication address
The number specified by the command from is inserted as is.
The communication address that returned the response.
Function code
Function code that was received.
Data
Data received.
CRC-16
Cyclical Redundancy Check
This check code is for the communication address until the end of the data.
