Omron V680S-HMD63-ETN User Manual page 127

Using Modbus Queries for Communication Diagnostic
Refer to the following flowchart to use Modbus queries.
Enabling Communication Diagnostic
p.125
Communicating with an RF Tag
p.125
Getting Communications Diagnostic Results
p.126
 Enabling Communication Diagnostic
1.
Use the SET COMMUNICATION DIAGNOSTIC query to enable communication diagnostic.
 Query Format
Byte 0 Byte 1 Byte 2 Byte 3
Transaction
Protocol identifier
identifier
X X 0000 hex
 Response Format
Normal Response
Byte 0 Byte 1 Byte 2 Byte 3
Transaction
Protocol identifier
identifier
X X 0000 hex
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 7 Host Communications Specifications and use an RF Tag
communications query to communicate with the RF Tag.
Refer to RF Tag Communications in Section 7 Host Communications Specifications for information on RF Tag
communications queries.
p.160
Check to see if the communications diagnostic result is indicated by a green, yellow, or red operation indicator on the Reader/
Writer .
Byte 4 Byte 5 Byte 6 Byte 7
Unit
Field length Function code
identifier
0009 hex FF hex 10 hex
Byte 4 Byte 5 Byte 6 Byte 7
Unit
Field length Function code
identifier
0006 hex FF hex 10 hex
Byte 8 Byte 9 Byte 10 Byte 11 Byte 12
Register address Word count Byte count
B300 hex 0001 hex 02 hex
Byte 8 Byte 9 Byte 10 Byte 11
Register address Word count
B300 hex 0001 hex
Section 6
Functions
Byte 13 Byte 14
Communication
diagnostic setting
0001 hex
RFID System
125
User's Manual
(Modbus TCP)