Sharp ER-A440 (serv.man6) Service Manual ▷ View online
4) Transmission sequence flow
LINE ESTABLISHED
FULL DUPLEX ?
DCD OFF ?
TIME OUT ?
RTS ON
DSR ON ?
FULL DUPLEX ?
DCD ON ?
CTS ON ?
TIME OUT ?
TIME OUT ?
YES
YES
YES
NO
NO
5 sec
YES
YES
YES
YES
YES
NO
30 sec
NO
YES
7 sec (Programmable)
TXRDY ?
SEND 1 CHARACTER
MORE TO
SEND ?
SEND ?
FULL DUPLEX ?
WAIT 100ms
FULL
DUPLEX ?
DUPLEX ?
RTS OFF
LINE ESTABLISHED
TRANSMIT ERROR
NO
YES
YES
YES
YES
LINE ESTABLISHED
RTS OFF
DTR OFF
RTS OFF
RTS OFF
– 12 –
5) Receiving sequence flow
LINE ESTABLISHED
DSR ON ?
DCD ON ?
RXRDY ?
READ 1 CHARACTER
EOT ?
ENQ ?
ACK ?
HALF
DUPLEX ?
TIME OUT ?
TIME OUT ?
SEND TEXT
LINE ESTABLISHED
RECEIVE ERROR
AFTER
RECEIVE
ER-OFF
COMMAND
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
NO
YES
YES
YES
YES
ID. ENQ
∞
ACK or
NAK 4 sec
TEXT 7 sec
NAK 4 sec
TEXT 7 sec
END CODE
NAK ?
BUFFER FULL ?
LINE ESTABLISHED
DTR OFF
RTS OFF
RTS OFF
DSR OFF
INITIAL
YES
YES
YES
YES
YES
NO
30sec
DTR OFF
RTS OFF
RTS OFF
– 13 –
CHAPTER 7. DATA BLOCK FORMAT
1. Basic format
Start code : This code may not be provided.
Null is impermissible.
End code : This code may not be provided.
Null or any same code as the start code is
not permissible.
not permissible.
When master reset is performed, the default is assumed:
Start
code
=
02h
End
code
=
0Dh
Block consecutive No. : This number starts with 30h and cycles
like this: 30h, 31h — 39h, 30h, 31h (Ring
counter system)
counter system)
Check sum
: 2 bytes hex number
Low-order 8-bit data of the complement of
2 for the sum of text data.
2 for the sum of text data.
RAM data:
: Even number of data that is obtained by
dividing one byte of RAM data into high-
order 4 bits and low-order 4 bits and con-
verting them to ASCII codes shown in the
code conversion table.
order 4 bits and low-order 4 bits and con-
verting them to ASCII codes shown in the
code conversion table.
Code conversion table .
Print code (high-order or low-order 4 bits)
Line image
Bit image
Hexadecimal
ASCII
0000
0
30h
0001
1
31h
0010
2
32h
0011
3
33h
0100
4
34h
0101
5
35h
0110
6
36h
0111
7
37h
1000
8
38h
1001
9
39h
1010
A
41h
1011
B
42h
1100
C
43h
1101
D
44h
1110
E
45h
1111
F
46h
CHAPTER 8. ONLINE application
1. ONLINE preset
1) SRV programming: NONE
2) PGM programming
Job#
PGM-MODE programming for online operation
2690
The assignment of RS232 channel by each devices.
6110
Programming of the terminal number
6111
Programming of the modem control
6112
Programming of the transmission data rate (Bau rate)
6113
Programming of the start and end code.
6115
Programming of time out value
6110
Online Preset reading
[JOB#2690] MRS = 0000
The assignment of RS232 channel by each devices.
X: 1
A:
On-line
2690-A
No
0
Yes (Channel No. = 8)
8
[JOB#6110] MRS = 000001
Programming of the terminal number
NK: Terminal No. = 0 to 999999
1) ID-ENQ :
10bytes
ENQ code (05h)
Terminal No. 000001-999999 (6 bytes)
EOT is set as dummy cahracters. (3 bytes)
2) ACK :
1 byte 06h
3) NAK :
1 byte 15h
4) EOT :
1 byte 04h
5) ENQ :
1 byte 05h
6) TEXT :
Data ASCII (max. 250 bytes)
Block consecutive No.
Start code
End code
Check sum
Example
Memory image
Line image
02
5A
F0
1
2
3
30h
32h
35h
41h
46h
30h
Transmission sequence
1
2
3
2690
X
X
X
ABCD
ST
TL
0
6110
NK
0
x
TL
– 14 –
[JOB#6111] MRS = 00
Programming of the modem control
6111-A: 1. Sensing of the CI signal Yes/No
1. Sensing of the CI signal
6111-A
No
0
Yes
1
6111-B: 1. Duplex type
1. Duplex type
6111-B
Full duplex system
0
Half duplex system
1
[JOB#6112] MRS = 5
Programming of the transmission baud rate
6112-A: Transmission baud rate
Transmission baud rate
6112-A
300 bps
0
600 bps
1
1200 bps
2
2400 bps
3
4800 bps
4
9600 bps
5
19200 bps
6
[JOB#6113] MRS = 002013
Programming of the start and end code
XXX: Start code = 02H (STX)
YYY: End code = 0DH (CR)
YYY: End code = 0DH (CR)
[JOB#6115] MRS = 007
Programming at the time-out value.
XXX: 1
∼
255 sec
[JOB#6110]
Online preset reading
6111
AB
0
x
TL
6112
A
0
x
TL
6113
XXXYYY
0
x
TL
6115
XXX
x
TL
6110
TL
x
– 15 –
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