Field Extension Mode - Omron V680 Series User Manual

Section 6
Functions

Field Extension Mode

You can use this mode to link Reader/Writers in order to extend the effective communications field of a
Reader/Writer. Even if the workpieces are not all the same height or not oriented in the same direction,
the placement of more than one Reader/Writer enables communicating with the RF Tags without
worrying about the positions or orientation of the RF Tags.
This mode enables communications over a wide communications field and is therefore recommended
for applications in which the locations or orientation of the RF Tags is not consistent.
Workpiece
RF Tag
Slave
Reader/Writer
Slave
Reader/Writer
If you use Field Extension Mode, you can use only three RF Tag communications queries: READ
DATA, WRITE DATA, and READ ID. Also, you can specify only the Once or Auto communications
option. If you use the FIFO Trigger communications option in Field Extension Mode, an execution
status error will be indicated in the response.
Applicable RF Tag Communications Queries
READ DATA
WRITE DATA
DATA FILL
RF TAG OVERWRITE COUNT CONTROL
READ ID
COPY
LOCK
Applicable Communications Options
Once
Auto
FIFO Trigger
In Field Extension Mode, the Reader/Writers do not simultaneously perform communications.
The Reader/Writers individually perform communications on a time sharing basis.
For details, refer to Using Field Extension Mode in this section.
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RFID System
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User's Manual
(Modbus TCP)
Slave
Reader/Writer Master
Reader/Writer
Workpiece
RF Tag
Effectively expanded communications field
Communicating with RF Tags is possible without being affected by the orientation of the workpieces
(i.e., the locations where the RF Tags are attached).
Switching Hub
Supported
Yes
Yes
No
No
Yes
No
No
Supported
Yes
Yes
No
PLC