Read Sharp ER-A750 (serv.man3) Service Manual online
17. RS-232 connecting device cable
wiring diagram
1. [Scale: Model 8213]
1) Data transmission format
– 7bits ASCII code
– Even parity
– One stop bit
– Rate:9600 asynchronous
– Even parity
– One stop bit
– Rate:9600 asynchronous
Their datas are fixed by ECR.
2) Pin-outs
3) Protocol
2. [Coin dispenser: by Telequip
Corporation]
1) Data transmission format
– 7bits ASCII code
– One start bit
– Even parity
– One stop bit
– Rate:9600 asynchronous
– One start bit
– Even parity
– One stop bit
– Rate:9600 asynchronous
Their datas are fixed by ECR.
2) Pin-outs
3) Protocol
Dispense coins
Pin No.
: 1
: 2 RD
: 3 SD
: 4
: 5 GND
: 6 DSR
: 7 RTS
: 8 CTS
: 9
1 Ground
2 SD
3 RD
4 RS
5 CS
6 DR
(ECR)
(Scale)
Pin No.
:
:
:
:
:
:
Command
Response
(ECR)
(Scale)
<Command>
<Response>
W
<STX>0XX.XX<CR> ;Lb
<STX>XX.XXX<CR> ;Kg
(Error)
<STX>?<status byte><CR>
<STX>?<status byte><CR>
b7
Parity
bit
(Even)
Parity
bit
(Even)
b6
Always
=1
Always
=1
b5
Net WT.
=1
Net WT.
=1
b4
Center
of
zero
=1
Center
of
zero
=1
b3
Outside
zero
capture
range
=1
Outside
zero
capture
range
=1
b2
Under
zero
=1
Under
zero
=1
b1
Out of
range
=1
Out of
range
=1
b0
Motion
=1
Motion
=1
Scale status byte format:
Pin No.
: 1
: 2 RD
: 3 SD
: 4
: 5 GND
: 6 DSR
: 7 RTS
: 8 CTS
: 9
1
2 RD
3 SD
4
5 GND
(ECR)
(C/D)
Pin No.
:
:
:
:
:
<STX>XX<ETX><cc>
status
(ECR)
(C/D)
EOT
"C"
ACK
status
NAK
or
XX: ten' s+one' s
– 8 –
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