PN 9001024
Rev. B Jan. 2000
Page 3-8
SATO CL608 & CL612 SERVICE MANUAL
SECTION 3 – Interface Specifications
TSOHNOITCENNOCRETNIRETNIRP
GF)dnuorGemarF(GF1
DTataDtimsnarTDT2
DR)ataDevieceR(DR3
)dneSottseuqeR(STR4
)dneSotraelC(STC5
)ydaeRteSataD(RSD6
* )ydaeRlanimreTataD(RTD02
GS)dnuorGlangiS(GS7
Cable Requirements
X-On/X-Off Flow Control (Cont.)
Data Streams
The Data streams for X-On/X-Off are constructed in the same way as they are for
Ready/Busy flow control. The STX and ETX control characters must frame the data
stream. (NOTE: All characters, including STX, ESC and ETX are in ASCII ).
<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
This is a two-way communications protocol between the host computer and the printer,
thus enabling the host to check printer status. When this protocol is selected, there is no
busy signal from the printer (pin 20, DTR, is always high). The host must request the
complete status from the printer, including ready/busy. Whenever the host requests
printer status, it transmits an ENQ to the printer and the printer will respond with its
status within five milliseconds. If printing, it will respond upon finishing the current
label, then resume printing. In order for this protocol to work properly, pin 6 (DTR) and
pin 5 (CTS) must be held high by the host. One way to ensure these pins are always in
the correct state is to tie pin 20 (DTR) to pin 6 (DSR) and pin 4 (RTS) to pin 5 (CTS) at
the printer end of the cable.
3-4 RS232C Serial Interface (Cont.)
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