CHAPTER 3 INTERFACE
B-EP Series
3-31
• When an error occurs while the command is being processed.
Time out
Host: Time out due to waiting for a NAK after a PAD is sent .............. 50 msec.
(After time out, a PAD should be sent repeatedly.)
Time out due to waiting for an ACK after a command is sent .... 200 msec.
NOTE: The process time for issuing a label or storing data into flash ROM varies
according to the contents to be processed. Therefore, time out waiting for an
ACK is not set.
Printer: Time out due to waiting for a command after a NAK is sent .......................... 1 sec.
Time out due to waiting for an EOT or a command after an ACK is sent ...... 1 sec.
Time out due to waiting for an EOT after the status is sent ........................... 1 sec.
Printer
A link request is detected.
A link is established.
Within 40 msec.
Normal reception (CRC OK)
The process ends abnormally.
Therefore, an ACK is not sent.
Host
PAD
NAK
Command packet
EOT
CK
Start of command process
An error occurs.
A link request is transmitted
every 50 msec. if the printer
sends no NAK.
Within 1 sec.
Within 1 sec.
Within 200 msec.
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