Omron V400-R2 Series User Manual page 51

Communication protocol
The following two systems exist for transmitting the data read by the reader to the
equipment.
Nonprocedural system (no protocol system)
The reader transmits the data to the upper equipment and ends the communication.
Multi-code reader
V400-R2 series
Data
Upper equipment
ACK/NAK system
The reader waits for a response from the upper equipment after transmitting the data.
When ACK (06H) 1 byte is received from the upper equipment, a buzzer sounds
indicating normal finishing and ends data transmission.
Multi-code reader
V400-R2 series
Data
Upper equipment
When NAK (15H) 1 byte is received from the upper equipment, the data is transmitted
again. When the time-up time set beforehand comes, the time-up buzzer sounds and
the data transmission ends.
Multi-code reader
V400-R2 series
Data
Upper equipment
Basic Knowledge of Operation
End
End
Data
Section 3
Data
V400-R2 series
User's Manual
49