SATO GL4XXE manual READY/BUSY Interface Signals, Signal Signal Definition

	Unit 3: Installation
	READY/BUSY INTERFACE SIGNALS
SIGNAL	SIGNAL DEFINITION
FGN	(Frame Ground)
TxD	(Transmit Data) - Data from the printer to the host computer. Sends X-On/X-Off characters or status
	data (bi-directional protocols).
RxD	(Receive Data) - Data to the printer from the host computer.
RTS	(Request To Send) - Used with Ready/Busy flow control to indicate an error condition. RTS is high
	and remains high unless the print head is open (in this case, RTS would return to the high state after
	the print head is closed and the printer is placed back online) or an error condition occurrs during
	printing (e.g., ribbon out, label out).
CTS	(Clear To Send) - When this line is high, the printer assumes that data is ready to be transmitted. The
	printer will not receive data when when the line is low. If not being used, it is be tied high.
DSR	(Data Set Ready) - When this line is high, the printer will not receive data. This line must be high
	before data is transmitted. If not being used, it is to be tied high.
SGN	(Signal Ground)
DTR	(Data Terminal Ready) - This signal applies to Ready/Busy flow control. The printer is ready to
	receive data when this pin is high. It goes low when the printer is offline, either manually or due to an
	error condition, and while printing in the single-job buffer mode. It will also go low when the data in the
	buffer reaches the buffer near-full level.

READY/BUSY CABLE REQUIREMENTS

DB9	HOST	DIRECTION	DB9	PRINTER
--	FGN (Frame Ground)	Bi-Directional	--	FGN (Frame Ground)
3	TxD (Transmit Data)	To Printer	2	RxD (Receive Data)
2	RxD (Receive Data)	To Host	3	TxD (Transmit Data)
6	DSR (Data Set Ready)	To Printer	4	DTR (Data Terminal Ready)
5	SGN (Signal Ground)	Bi-Directional	5	SGN (Signal Ground)
4	DTR (Data Terminal Ready)	To Host	6	DSR (Data Set Ready)
8	CTS (Clear To Send)	To Printer	7	RTS (Request To Send)
7	RTS (Request To Send)	To Host	8	CTS (Clear To Send)

GL408-412e Operator’s Manual 3-9