Citizen Systems PPU-231II manual GS r n, See Also DLE EOT, GS a

GS r n

[Function]	Sending status
[Code]	<1D>H<72>H<n>
[Range]	n=1, 49
[Outline]	Sends the specified status to the host.
	n		Function
	1,49		Sends the paper Sensor status.
[Caution]	• When the serial interface is used:
	For DTR/DSR control:
		The printer sends the status after verifying that the host is
		ready to receive. If the host is not ready to receive, the
		printer waits for the host to become ready to receive.
	For XON/XOFF control:
		The printer sends the status without checking whether the
		host is ready to receive or busy.
	• Because this command is executed when data is mapped in
	the receive buffer, there may be a delay between receiving the
	command and sending the status depending on the condition
	of the receive buffer.
	• If ASB (Automatic Status Back) is enabled by GS a, the host
	must discriminate between the status due to this command
	and the status due to ASB.
	• Paper Sensor status (n = 1, 49)
	Bit		Status	Hex.	Decimal
	0		Paper found by Paper Near-end Sensor 1	00	0
			Paper not found by Paper Near-end Sensor 1	01	1
	1		Paper found by Paper Near-end Sensor 2	00	0
			Paper not found by Paper Near-end Sensor 2	02	2
	2		Paper found by Paper-end Sensor	00	0
			Paper not found by Paper-end Sensor	(04)	(4)
	3		Paper found by Presenter Sensor	00	0
			Paper not found by Presenter Sensor	08	8
	4		Unused	00	0
	5		Undefined	—	—
	6		Undefined	—	—
	7		Unused	00	0

Bit 2: Whenever the Paper-end Sensor detects a “paper out” state, the printer goes offline, and the command is not executed. The printer, therefore, never sends a status bit 2 = “1”.

[See Also] DLE EOT, GS a

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