Writing To The Variable Area - Omron E5AR - MANUAL 2 User Manual

Section 7 Communication (Modbus)

7.6 Writing to the variable area

Write to the variable area by setting the required data in the following command frame.
Command
Response
7-12
Command frame
Slave Function Write start Number of
address mode address elements
H'10
1 1 2
Data name
Specify the "Unit No." of the E5AR/ER. Set in hexadeci-
Client address
mal from H'01 to H'63 (1 to 99).
Function mode The function code for variable area write is H' 10.
Specify the address of the setting data to which you wish
First address of to write.
write For more information on addresses, see "Appendix Set-
ting list" (P.A-6).
Specify the number of setting data items that you wish to
write 2 for the number of elements. The setting range
Number of
is H'0002 to H'0068 (2 to 104).
elements
Example: When the number of setting data items is 2,
Byte count Specify the number of bytes of data to be written.
FINS-mini response text
Slave Function Write start Number of
address mode address elements
H'10
1 1 2
Data name
Client address The value from the command frame appears here.
This is the received function code.
In an error response frame, "H'80" is added to the
received function code to indicate that it is an error
Function mode
response.
Example: Received function code = H'10
Beginning Beginning address of write that was received.
address of write
Number of Received number of elements.
elements
This is a check code calculated from the client address
to the data end. For the calculation method, see "7.2
CRC-16
Frames ■ Command frame ● Example of CRC-16 cal-
culation" (P.7-4).
Byte Write data
count Data 1 Data 1
Most significant Least significant
2 1 Number of elements 2 bytes
Data n Data n
Most significant Least significant
Explanation
specify H' 0004.
CRC-16
2 2
Explanation
Function code in error response frame = H'90
CRC-16
2