Sharp ER-A440 (serv.man6) Service Manual ▷ View online
2) Up-loading matrix for the host
STATE
Initial
After sending ID ENQ
After sending text
EVENT
0
1
2
ENQ
—
—
—
ACK
—
Sends text and goes to 2.
Sends EOT and goes to 3.
NAK
—
—
Resends the text and then goes to 2.
If the host has resent the text two times, it goes to 0.
(ERROR END)
If the host has resent the text two times, it goes to 0.
(ERROR END)
EOT
—
—
The host goes to 0.
(ERROR END)
(ERROR END)
TEXT
—
—
—
TIME-UP
—
Resends ID ENQ and then goes to 1.
If the host has resent ID ENQ two times, it goes to 0.
(ERROR END)
If the host has resent ID ENQ two times, it goes to 0.
(ERROR END)
Resends the text and then goes to 2.
If the host has resent the text two times, it goes to 0.
(ERROR END)
If the host has resent the text two times, it goes to 0.
(ERROR END)
KEY ENTRY
Sends ID ENQ and goes to 1.
—
—
Time-up: One second after sending of ID ENQ.
Four seconds after sending of text.
STATE
After sending EOT
After sending ACK
After sending NAK
EVENT
3
4
5
ENQ
Sends ACK and goes to 4.
After the host has received ENQ, resends ACK and goes to
4.
After the host has received TEXT, ignores the ENQ.
4.
After the host has received TEXT, ignores the ENQ.
—
ACK
—
—
—
NAK
—
—
—
EOT
The host goes to 0
(ERROR END)
(ERROR END)
After the host has received TEXT, goes to 0.
(Normal end)
After the host has received ENQ, goes to 0.(ERROR END)
(Normal end)
After the host has received ENQ, goes to 0.(ERROR END)
The host goes to 0.
(ERROR END)
(ERROR END)
TEXT
—
The host checks the text block, if the block is correct, the
host sends ACK and goes to 4.
If it is not correct, the host sends NAK and goes to 5.
If transmission cannot be continued, the host sends EOT
and goes to 0.
host sends ACK and goes to 4.
If it is not correct, the host sends NAK and goes to 5.
If transmission cannot be continued, the host sends EOT
and goes to 0.
The host checks the checks the text block, if the block is
correct, the host sends ACK and goes to 4.
If it is not correct, the host sends NAK and goes to 5.
If transmission cannot be continued, the host sends EOT
and goes to 0.
(ERROR END)
correct, the host sends ACK and goes to 4.
If it is not correct, the host sends NAK and goes to 5.
If transmission cannot be continued, the host sends EOT
and goes to 0.
(ERROR END)
TIME-UP
Resends EOT and goes to 3.
If the host has resent the EOT two times, it goes to 0.
(ERROR END)
If the host has resent the EOT two times, it goes to 0.
(ERROR END)
The host goes to 0.
(ERROR END)
Time-up is 7 seconds
(ERROR END)
Time-up is 7 seconds
The host goes to 0.
(ERROR END)
Time-up is 7 seconds
(ERROR END)
Time-up is 7 seconds
KEY ENTRY
—
—
—
Time-up: Two second after sending of EOT.
– 8 –
3) Down-loading matrix for the sattelite
STATE
Initial
After sending ACK
After sending NAK
EVENT
0
1
2
ID-ENQ
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.
sends ACK and goes to 1.
If it is not correct, Satellite ignores the ID-ENQ.
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.
sends ACK and goes to 1.
If it is not correct, Satellite ignores the ID-ENQ.
—
ACK
—
—
—
NAK
—
—
—
EOT
—
After satellite has received TEXT, goes to 0.
(Normal end)
Before satellite has received TEXT, ignores the EOT
(Normal end)
Before satellite has received TEXT, ignores the EOT
Satellite goes to 0.
(ERROR END)
(ERROR END)
TEXT
—
Satellite checks the text block, if the block is correct,
Satellite sends ACK and goes to 1.
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 sends ACK and goes to 1.
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 checks the text block, if the block is correct,
Satellite sends ACK and goes to 1.
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 sends ACK and goes to 1.
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)
TIME-UP
—
Satellite sends EOT, and goes to 0.
(ERROR END)
Time-up is 7 seconds
(ERROR END)
Time-up is 7 seconds
The host goes to 0.
(ERROR END)
Time-up is 7 seconds
(ERROR END)
Time-up is 7 seconds
– 9 –
4) Up-loading matrix for the satellite
STATE
Initial
After receiving ID-ENQ and sending ACK.
After sending NAK
EVENT
0
1
2
ID-ENQ
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.
sends ACK and goes to 1.
If it is not correct, satellite ignores the ID-ENQ.
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.
sends ACK and goes to 1.
If it is not correct, satellite ignores the ID-ENQ.
—
ACK
—
—
—
NAK
—
—
—
EOT
—
—
Satellite goes to 0.
(ERROR END)
(ERROR END)
TEXT
—
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 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 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 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)
TIME-UP
—
Satellite goes to 0.
(ERROR END)
Time-up is 7 seconds
(ERROR END)
Time-up is 7 seconds
Satellite goes to 0.
(ERROR END)
Time-up is 7 seconds
(ERROR END)
Time-up is 7 seconds
STATE
After receiving text and sending ACK
After sending ENQ
After sending TEXT
EVENT
3
4
5
ID-ENQ
—
—
—
ACK
—
Satellite sends the text and goes to 5.
Satellite sends the text and goes to 5, or sends the EOT
and goes to 0.
(Normal END)
and goes to 0.
(Normal END)
NAK
—
—
Resends the text and then goes to 5.
If satellite has resent the text two times, sends EOT and
goes to 0.
(ERROR END)
If satellite has resent the text two times, sends EOT and
goes to 0.
(ERROR END)
EOT
Satellite sends ENQ and goes to 4.
Resends the ENQ and then goes to 4.
If Satellite has resent the ENQ two times, sends EOT and
goes to 0.
(ERROR END)
If Satellite has resent the ENQ two times, sends EOT and
goes to 0.
(ERROR END)
Satellite goes to 0.
(ERROR END)
(ERROR END)
TEXT
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 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)
—
—
TIME-UP
The host goes to 0.
(ERROR END)
Time-up is 7 seconds
(ERROR END)
Time-up is 7 seconds
Resends the ENQ and then goes to 4.
If satellite has resent the ENQ two times, sends EOT and
goes to 0.
(ERROR END)
If satellite has resent the ENQ two times, sends EOT and
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)
If satellite has resent the text two times, sends EOT and
goes to 0.
(ERROR END)
Time-up: Four seconds after sending of text.
Two second after sending of ENQ.
– 10 –
CHAPTER 6. CONTROL SIGNAL SEQUENCE
1. Online transmission
1) Half duplex transmission
2) Full duplex transmission
*Note: In the direct connect mode, same as full duplex control, but
the CI signal is not controlled.
3) Line connection sequence flow
DATA
SD
DTE
DCE
DATA
RD
RTS
CTS
DSR
DCD
DTR
CI
< 100ms
< 500ms
DATA
SD
DTE
DCE
DATA
RD
RTS
CTS
DSR
DCD
DTR
CI
< 100ms
< 500ms
*
STARTED BY P.C
INITIAL
CI SENSE ?
CI ON ?
DTR ON
DSR ON ?
FULL DUPLEX ?
RTS ON
LINE ESTABLISHED
NO
NO
NO
NO
NO
NO
YES
YES
CI SENSE ?
TIME OUT ?
YES
YES
YES
Note : The CI signal can be changed over when
so set in the PGM mode, and effective
at ECR side.
so set in the PGM mode, and effective
at ECR side.
30sec
ERROR : NO LINE
DTR OFF
– 11 –
Click on the first or last page to see other ER-A440 (serv.man6) service manuals if exist.