Omron V680S-HMD64-EIP User Manual page 186

Section 7
Host Communications Specifications
 Using the Repeat or FIFO Repeat Communications Option
Command code
Command
Area
Command parameters
Command data
Response
Area
Response code
Response information
Response data
Communications field
1. The command code, command parameters, and command data are set from the PLC while the READY
signal is ON.
2. The user (PLC) turns ON the EXE signal. This tells the Reader/Writer to start execution.
3. When the Reader/Writer receives the instruction to start execution, it turns OFF the READY signal and
turns ON the BUSY signal.
4. The Reader/Writer detects the first RF Tag (RF Tag A) and when communications end normally, it sets the
response code, response information, and response data, toggles the FRIC signal (turns it ON), and turns
ON the NORM signal.
5. The user (PLC) detects that the FRIC signal has changed and that the NORM signal has turned ON and
reads the response data.
6. The Reader/Writer detects the second RF Tag (RF Tag B) and when communications end in an error, it sets
the response code and response information, toggles the FRIC signal (turns it OFF), and turns ON the
ERR signal.
7. The user (PLC) detects that the FRIC signal has changed and that the ERR signal has turned ON, reads
the response code and response information, and checks the error.
8. If the BUSY signal is ON and the user (PLC) wants to cancel Repeat or FIFO Repeat communications, the
user (PLC) turns OFF the EXE signal. This tells the Reader/Writer to stop execution.
9. When the Reader/Writer receives the instruction to stop execution, it turns ON the READY signal and turns
OFF the BUSY, FRIC, NORM, and ERROR signals.
RFID System
184
User's Manual
(EtherNet/IP TM )
EXE
READY
BUSY
FRIC
NORM
ERR
1 2 3
RF Tag A RF Tag B
4 5 6 7 8 9 9