Omron V780-Series User Manual page 133

Operation of "Once" Communications Mode
• If the RF Tag completes normally in any of the Reader/Writers in single-access
The master Reader/Writer communicates with the RF Tags by switching control of itself and the
Slave Reader/Writers in time division. When "RF Tag Missing Error" or "RF Tag Communications
Error" are detected in the communications processing of the Reader/Writers, the communications
processing continues through switching the control in the order of Master → Slave 1→ Slave 2 →
Slave 3, and repeats this until timeout. When an RF Tag is detected and completes normally, it
returns the communications results without waiting for a timeout.
Communications
Host device
Master Reader/Writer
Slave Reader/Writer 1
Slave Reader/Writer 2
Slave Reader/Writer 3
RF Tag movement
• If communications with an RF Tag completes abnormally in any of the Reader/Writers in single-access
The master Reader/Writer communicates with the RF Tags by switching control of itself and the
Slave Reader/Writers in time division. When an RF Tag is detected and completes abnormally (other
than the "RF Tag Missing Error" and "RF Tag Communications Error"), it returns the communications
results without waiting for a timeout.
Communications
Host device
Master Reader/Writer
Slave Reader/Writer 1
Slave Reader/Writer 2
Slave Reader/Writer 3
RF Tag movement
UHF RFID System V780-series Reader/Writer User's Manual (EtherNet/IP
Commands
Command
"Once"
communications
"Once"
communications
RF Tag Missing or RF Tag Communications Error
Commands
Command
"Once"
communications
"Once"
communications
RF Tag Missing or RF Tag Communications Error
Slave control
"Once"
communications
"Once"
communications
Slave control
"Once"
communications
"Once"
communications
TM
) (Z402)
6 Functions
Timeout
Response
"Once"
communications
"Once"
communications
RF Tag
Timeout
Response
"Once"
communications
"Once"
communications
Address error
RF Tag
6
6 - 61