Ascii Data Transfer; Determining If Your Escape Sequence Command Has Been Successfully Performed - HP 262SA Reference Manual

Peripheral Devices
ASCII Data Transfer
To copy an ASCII data string from the computer to the printer, use the following escape
sequence:
Ec
&p
W <data string)
The entire data string is copied. The string is terminated either by anASCII line feed character
or by the 256th character.
DETERMINING IF YOUR ESCAPE SEQUENCE COMMAND HAS
BEEN SUCCESSFULLY PERFORMED
After issuing a copy line, copy page, copy all, advance line, or advance page
Ec
&p
sequence, the
remote program can determine whether or not the operation was successfully performed by
executing an INPUT (BASIC language) or similar instruction that requests one ASCII charac-
ter from the terminal.
The terminal responds by sending an cCS", cCF", or cCU". An cCs" indicates successful completion, an
CCF" indicates that the operation failed, and a CCU" indicates that the terminal operator inter-
rupted the data transfer by pressingl:l. A CCU" can be returned only for a copy page or copy all
operation.
If the printer is offline when an attempt is made to transfer data to it, the terminal will still
return an cCs".
These completion codes cannot be suppressed by configuration parameters or any other means.
They are always transmitted and your programs should include input commands for accepting
them.
The keyboard is disabled CClocked") until the status is sent.
In either Character or Block Line·mode, the terminal sends a <CR> (or a <CR> <LF> ifAuto
Linefeed mode is enabled) following the completion code. In Block Page mode, it sends a block
terminator character.
If a datacomm error occurs during transmission of the data record, the device control comple-
tion code is unpredictable. Datacomm errors are reported by way of the terminal status bytes
described in Section 8.
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