Omron V780-Series User Manual page 134

6 Functions
Precautions for Correct Use
• While Multi-Reader/Writer communications processing is continuing, the NORM/ERR indica-
tors will not light red even if "RF Tag Missing Error" or "RF Tag Communications Error" is
detected in a Reader/Writer.
• The NORM/ERR indicator lamp of the Reader/Writer will light green/red after normal comple-
tion/error completion in Multi-Reader/Writer communications processing. Finally, the NORM/ERR
indicators of the master Reader/Writer will light green/red when replying to the host device.
• If multiple RF Tags are detected by any of the Reader/Writers in multiaccess
The master Reader/Writer communicates with the RF Tags by switching control of itself and the
Slave Reader/Writers in time division. While detecting multiple RF Tags within the timeout time,
communications processing will repeat by switching in the sequence of Master → Slave 1 → Slave
2 → Slave 3, and the communications result will be returned when RF Tag communications are
completed.
Communications
Host device
Master Reader/Writer
Slave Reader/Writer 1
Slave Reader/Writer 2
Slave Reader/Writer 3
RF Tag movement
6 - 62
Commands
Command Response
"Once"
communications
"Once"
communications
RF Tag Missing
RF Tag
RF Tag
UHF RFID System V780-series Reader/Writer User's Manual (EtherNet/IP
Response
"Once"
communications
"Once"
communications
RF Tag Missing RF Tag
RF Tag
Timeout
Response
"Once"
communications
"Once"
communications
RF Tag Missing
RF Tag
RF Tag RF Tag
TM
) (Z402)