Transmission Control Matrix - Star Micronics TCP300II Series Product Specifications Manual

3-2.

Transmission Control Matrix

Event
ACK received
Host status
Idling Read and discarded
After command is
sent
ACK received
waiting to receive
ACK
After ACK received
waiting to receive Reset TCP
response
After response
Reset TCP
received ACK
After response
Reset TCP
received NAK
Notes:
1. There is no time limit to send ACK after receiving a command block. Responses can be up to three seconds.
2. There is no limit to the number of times to resend for transmission errors of command blocks or response blocks.
Therefore, the host side must be controlled.
3. There is no time limit from sending ACK to starting to send the response block. When issuing a command while inserting a card, execute the
command after inserting the card. Therefore, when not inserting a card, the execution of the command stops, and the response block transmission
stops. Commands can be deleted using the reset command (5Fh), or the card insertion wait status cancel command (54h).
4. The reset command (5Fh) can be executed even while another command is being executed. If the reset command (5Fh) is issued while another
command is being executed, that command will be terminated. Therefore, there is no response block for that command that was executed before
the reset command (5Fh). To execute the reset command (5Fh), wait approximately 3 seconds for the visual card reader/writer to initialize.
NAK received DLE received
Read and discarded Read and discarded
Resend command
block or process as
Command withdrawn
communication error
Reset TCP Reset TCP
Reset TCP Reset TCP
Reset TCP Reset TCP
4
Response received No response
Read and discarded Nothing occurs
If timeout
process timeout error
Reset TCP
Receive response Do nothing or process
block, respond with timeout error
ACK or NAK
Send next command
Reset TCP
Receive response If timeout
block, send ACK or process timeout error
NAK
error,
error,