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5
3-3. Transmission Control Matrix (Reader Type)
Event
TCP status
STX received ETX received Other receptions ACK received NAK received No response
1 Idling
→2
Read and
discarded→1
Read and
discarded→1
Read and
discarded→1
Read and
discarded→1
→1
2 Command received Buffering → 2 Buffering → 3
If data error
DLE sent → 1
If data normal
buffering → 2
If data error
DLE sent → 1
If data normal
buffering → 2
If data error
DLE sent → 1
If data normal
Buffering → 2
→2
3 BCC received
If BCC matched
→ 4
If BCC does not
match
NAK sent→ 1
If BCC matched
→ 4
If BCC does not
match
NAK sent→ 1
If BCC matched
→ 4
If BCC does not
match
NAK sent→ 1
If BCC matched
→ 4
If BCC does not
match
NAK sent→ 1
If BCC matched
→ 4
If BCC does not
match
NAK sent→ 1
→3
4 Wait for ACK after
response sent
Read and
discarded→ 4
Read and
discarded→ 4
Read and
discarded→ 4
→1
Response
resend → 4
→4
When a priority command, such as Reset command, is sent while another command is being executed, that command is canceled, and a priority
command response is returned.