
SECTION 3 - Interface Specifications
Rev C
52
SATO M-8400RV Service Manual
3-4 RS232C Serial Interface (Cont.)
X-On/X-Off Flow Control (Cont.)
Data Streams
7KH'DWDVWUHDPVIRU
;2Q;2II
DUHFRQVWUXFWHGLQWKHVDPHZD\DVWKH\DUHIRU
5HDG\%XV\IORZFRQWURO7KH
67;
DQG
(7;
FRQWUROFKDUDFWHUVPXVWIUDPHWKHGDWD
VWUHDP127($OOFKDUDFWHUVLQFOXGLQJ
67;(6&
DQG
(7;
DUHLQ$6&,,
<STX><ESC>A..Job#1..<ESC>Z<ESC>A..Job#n..<ESC>Z<ETX
Example: <STX>A..Job#1..<ESC>Z<ETX>XXXX
Bi-Directional Communications
7KLVLVDWZRZD\FRPPXQLFDWLRQVSURWRFROEHWZHHQWKHKRVWFRPSXWHUDQGWKHSULQWHU
WKXVHQDEOLQJWKHKRVWWRFKHFNSULQWHUVWDWXV:KHQWKLVSURWRFROLVVHOHFWHGWKHUHLVQR
EXV\VLJQDOIURPWKHSULQWHUSLQ
'75
LVDOZD\VKLJK7KHKRVWPXVWUHTXHVWWKH
FRPSOHWHVWDWXVIURPWKHSULQWHULQFOXGLQJUHDG\EXV\:KHQHYHUWKHKRVWUHTXHVWV
SULQWHUVWDWXVLWWUDQVPLWVDQ
(14
WRWKHSULQWHUDQGWKHSULQWHUZLOOUHVSRQGZLWKLWV
VWDWXVZLWKLQILYHPLOOLVHFRQGV,ISULQWLQJLWZLOOUHVSRQGXSRQILQLVKLQJWKHFXUUHQW
ODEHOWKHQUHVXPHSULQWLQJ,QRUGHUIRUWKLVSURWRFROWRZRUNSURSHUO\SLQ
'75
DQG
SLQ
&76
PXVWEHKHOGKLJKE\WKHKRVW2QHZD\WRHQVXUHWKHVHSLQVDUHDOZD\VLQ
WKHFRUUHFWVWDWHLVWRWLHSLQ
'75
WRSLQ
'65
DQGSLQ
576
WRSLQ
&76
DW
WKHSULQWHUHQGRIWKHFDEOH
Cable Requirements
HOST
INTERCONNECTION
PRINTER
FG
1 FG (Frame Ground)
RD
2 TD (Transmit Data)
TD
3 RD (Receive Data)
4 RTS (Request to Send)
5 CTS (Clear to Send)
6 DSR (Data Set Ready)
*
20 DTR (Data Terminal Ready)
SG
7 SG (Signal Ground)
,ID
&$1
KH[DGHFLPDOLVUHFHLYHGE\WKHSULQWHULWZLOOFDQFHOWKHFXUUHQWSULQWMRE
DQGFOHDUDOOGDWDIURPWKHUHFHLYHEXIIHU