Toshiba B-EP Series - Page 61

CHAPTER 3 INTERFACE
B-EP Series
3-30
• When the communication is made during an error state.
• When the Status Request Command is sent during an error state.
Printer
A link request is detected.
A link is established
Error is cleared.
Within 40 msec.
Host
PAD
NAK
Command packet
EOT
If the printer is in an error state, it returns
a status packet, and not an ACK.
The command is not processed.
Status packet
Normal reception (CRC OK)
A link request is transmitted
every 50 msec. if the printer
sends no NAK.
Within 1 sec.
Within 1 sec.
Printer
A link request is detected.
A link is established.
Within 40 msec.
Host
PAD
NAK
Regardless of a normal or error
state, the printer returns a status
packet when receiving the Status
Request Command.
Status request command packet
Status packet
EOT
Error is cleared.
Normal reception (CRC OK)
A link request is transmitted
every 50 msec. if the printer
sends no NAK.
Within 1 sec.
Within 1 sec.