Sharp ER-A440 Service Manual page 26

4) Up-loading matrix for the satellite
STATE
EVENT
Satellite checks the terminal No.:If it is correct, satellite
ID-ENQ sends ACK and goes to 1.
If it is not correct, satellite ignores the ID-ENQ.
ACK
NAK
EOT
TEXT
TIME-UP
STATE After receiving text and sending ACK
EVENT
ID-ENQ
ACK
NAK
Satellite sends ENQ and goes to 4.
EOT
Satellite checks the text block, if the block is correct,
satellite sends ACK and goes to 3.
If it is not correct, satellite sends NAK and goes to 2.
TEXT
If transmission cannot be continued, satellite sends EOT
and goes to 0.
(ERROR END)
TIME-UP The host goes to 0.
(ERROR END)
Time-up is 7 seconds
Time-up: Four seconds after sending of text.
Two second after sending of ENQ.
Initial
0
Satellite checks the terminal No.:If it is correct, satellite
sends ACK and goes to 1.
If it is not correct, satellite ignores the ID-ENQ.
—
—
—
Satellite checks the text block, if the block is correct,
satellite sends ACK and goes to 3.
If it is not correct, Satellite sends NAK and goes to 2.
—
If transmission cannot be continued, satellite sends EOT
and goes to 0.
(ERROR END)
Satellite goes to 0.
— (ERROR END)
Time-up is 7 seconds
3
—
Satellite sends the text and goes to 5.
—
—
Resends the ENQ and then goes to 4.
If Satellite has resent the ENQ two times, sends EOT and
goes to 0.
(ERROR END)
Resends the ENQ and then goes to 4.
If satellite has resent the ENQ two times, sends EOT and
goes to 0.
(ERROR END)
After receiving ID-ENQ and sending ACK.
1
—
—
—
After sending ENQ
4
—
—
—
After sending NAK
2
—
—
—
Satellite goes to 0.
(ERROR END)
Satellite checks the text block, if the block is correct,
Satellite sends ACK and goes to 3.
If it is not correct, Satellite sends NAK and goes to 2.
If transmission cannot be continued, satellite sends EOT
and goes to 0.
(ERROR END)
Satellite goes to 0.
(ERROR END)
Time-up is 7 seconds
After sending TEXT
5
—
Satellite sends the text and goes to 5, or sends the EOT
and goes to 0.
(Normal END)
Resends the text and then goes to 5.
If satellite has resent the text two times, sends EOT and
goes to 0.
(ERROR END)
Satellite goes to 0.
(ERROR END)
—
Resends the text and then goes to 5.
If satellite has resent the text two times, sends EOT and
goes to 0.
(ERROR END)