SATO WS412DT - State Transition Diagram Matrix (at Host)

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8.3.4 State transition diagram matrix (at host)
8.3.4.1 Status 3
Event
Status
A
Connect
response
(CONNECT)
B
Disconnect response
(DISCONNECT)
c
Print request
D
Return status receive
E
ACK/NAK receive
F
Timeout
G
Send connect request
(CONNECT)
H
Send disconnect
request
(DISCONNECT)
(1)
Neutral
-
-
-
-
-
-
(1) Timer register
(2) Connect request
(CONNECT)
-> (2)
-
(2)
Waiting for
connection
Connection
complete
-> (3)
Disconnected
-> (1)
-
-
-
Abnormal end
-> (1)
-
Disconnected
(DISCONNECT)
-> (1)
(3)
Connecting
-
Disconnected
-> (1)
(1) Timer
registration
(2) Status request
command send
-> (4)
-
-
Disconnected
(DISCONNECT)
-> (1)
-
Disconnected
(DISCONNECT)
-> (1)
(4)
Return status
Waiting for
response
-
Disconnected
-> (1)
-
(1) Timer release/Timer
reregistration
(2) Normal printer status
Send the print data
-> (5)
(3) Normal printer status
-> (3)
-
(1) When not up to retry
times
Send status request
command
-> (4)
(2) Retried until the retry
times
-
-> (1)
-
Disconnected
(DISCONNECT)
-> (1)
(5)
Waiting for
ACK
response
-
Disconnected
-> (1)
-
ACK/NAK receive
Timer release
-> (3)
Disconnected
(DISCONNECT)
-> (1)
-
Disconnected
(DISCONNECT)
-> (1)
[Note]
1. The same timer is used for waiting for connection, waiting for status return, and waiting for ACK response to be able to simplify the above matrix.
2. The printer cannot disconnect (send DISCONNECT) at the power off. Please set up time out process at the host.
3. Make sure to check the printer status by sending status request command (ENQ) before sending any print data because the printer cannot print during printer error.
4. When (5) Time out for ACK response occurred, assuming that the LINK has been disconnected, power off and on the printer and reconnect.