Omron V680S Series User Manual page 58

Section 2
Names and Functions of Components
Using MODBUS Queries for Communication Diagnostic
Refer to the following flowchart to use MODBUS queries.
 Enabling Communication Diagnostic
1.
Use the SET COMMUNICATION DIAGNOSTIC query to enable communication diagnostic.
 Query Format
Byte 0 Byte 1
Transaction
identifier
X X
 Response Format
Normal Response
Byte 0 Byte 1
Transaction
identifier
X X
When you enable communication diagnostic, the setting will be retained after the Reader/Writer is restarted and
communication diagnostic will remain enabled.
You cannot use communication diagnostic if you are using the FIFO Trigger communications option. Use the once or
auto communications option.
 Communicating with an RF Tag
1.
Refer to RF Tag Communications in Section 5 Host Communications Specifications and use an RF Tag
communications query to communicate with the RF Tag.
Refer to RF Tag Communications in Section 5 Host Communications Specifications for information on RF Tag
communications queries.
Check to see if the communications diagnostic result is indicated by a green, yellow, or red operation indicator on the Reader/
Writer .
RFID System
56
User's Manual
Enabling Communication Diagnostic
p.56
Communicating with an RF Tag
p.56
Getting Communications Diagnostic Results
p.57
Byte 2 Byte 3 Byte 4 Byte 5 Byte 6
Unit
Protocol identifier Field length
identifier
0000 hex 0009 hex FF hex
Byte 2 Byte 3 Byte 4 Byte 5
Protocol identifier Field length
0000 hex 0006 hex
p.94
Byte 7 Byte 8 Byte 9
Function code Register address
10 hex B300 hex
Byte 6 Byte 7 Byte 8 Byte 9
Unit
Function code Register address
identifier
FF hex 10 hex B300 hex
Byte 10 Byte 11 Byte 12 Byte 13 Byte 14
Communication
Word count Byte count
diagnostic setting
0001 hex 02 hex 0001 hex
Byte 10 Byte 11
Word count
0001 hex