Epson RP-U420 manual = 6 Validation status

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C O N F I D E N T I A L	■■ ■■ ■■	more

•n = 6: Validation status

	Bit	Off/On	Hex	Decimal	Function
	0	Off	00	0	Not used. Fixed to Off.
	1	On	02	2	Not used. Fixed to On.
	2	Off	00	0	Validation is not selected.
		On	04	4	Validation is selected.
	3	Off	00	0	Not validation insertion waiting state.
		On	08	8	Within validation insertion waiting state.
	4	On	10	16	Not used. Fixed to On.
	5	Off	00	0	Validation sensor does not detect paper.
		On	20	32	Validation sensor is detecting paper.
	6	Off	00	0	Reserved. Fixed to Off.
	7	Off	00	0	Not used. Fixed to Off.
[Notes]	■ The status is transmitted whenever the data sequence of <10>H <04>H <n>
	(1 ≤ n ≤ 4 or 6) is received.

Example:

In ESC * m nL nH d1...dk, d1=<10>H, d2=<04>H, d3=<01>H

■This command should not be used within the data sequence of another command that consists of 2 or more bytes.

Example:

If you attempt to transmit ESC ! n to the printer, but DTR (DSR for the host computer) goes to MARK before n is transmitted and then DLE EOT 3 interrupts before n is received, the code <10>H for DLE EOT 3 is processed as the code for ESC ! <10>H.

■Even though the printer is not selected using ESC = (select peripheral device), this command is effective.

■The printer transmits the current status. Each status is represented by one-byte data.

■The printer transmits the status without confirming whether the host computer can receive data.

■The printer executes this command upon receiving it.

RP-U420 Status commands DLE EOT Ver. 1.0 p. 72