Citizen CBM1000 manual GS r n, When the serial interface is used

GS r n

[Function]	Sending status
[Code]	<1D>H<72>H<n>
[Range]	1		n	2
	49		n	50
[Outline]	Sends the specified status to the host.
		n		Function

1,49 Sends the paper Sensor status.

2,50 Sends the Drawer Kick-out Connector 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
0,1	Paper found by Paper Near-end Sensor	00	0
	Paper not found by Paper Near-end Sensor	03	3
2,3	Paper found by Paper end Sensor	00	0
	Paper not found by Paper end Sensor	(0C)	(12)
4	Unused	00	0
5	Undefined	—	—
6	Undefined	—	—
7	Unused	00	0

Bits 2, 3: 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 where bit 2 = “1” or bit 3 = “1”.

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