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CONFIDENTIAL
RP-U420 Miscellaneous commands DLE ENQ
Ver. 1.0
p. 74
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DLE ENQ
E
XECUTING
COMMAND
[Name]
Real-time request to printer
[Format]
ASCII DLE ENQ
n
Hex 10 05
n
Decimal 16 5
n
[Range]
1 ≤
n
≤ 3
[Default]
None
[Description]
Responds to a request from the host specified by
n
. The operations performed depend on the value of
n
, as
follows:
n
= 1: Recover from an error and restart printing from the line where the error occurred.
n
= 2: Clear the receive and print buffers and recover from an error.
n
= 3: Cancel waiting for validation.
[Notes] ■ The printer executes this command upon receiving this command.
■ With a serial interface model, this command is executed even in the offline, receive buffer-full, or error
states.
■ With a parallel interface model, the printer cannot receive data when it is busy; therefore this command
cannot be used under the following conditions.
• When DIP Switch 1-6 is On: receive buffer-full.
• When DIP Switch 1-6 is Off: receive buffer-full, offline, error states.
■ This command is executed any time the data sequence <10>H<05>H<
n
> (1 ≤
n
≤ 3) is received, even if it
appears as part of another command.
<Example>
In ESC *
m nL nH d1 ... dk
,
d1
=<10>H,
d2
=<05>H,
d3
=<1>
■ This command should not be used within the data sequence of another command that consists of two or
more bytes.
<Example>
If you attempt to transmit ESC !
n
to the printer, but DLE ENQ 3 interrupts before
n
is received, the
code <10>H for DLE ENQ 3 is processed as the code for ESC ! <10>H.
Miscellaneous commands