Microcom 424 Operator's Manual page 50

Printer Commands
better to use the ^D2 command sequence inside a file or program to assist in
trouble-shooting the format.
^C Print: Starts the print cycle or batch. This command is the equivalent of the
"^D3<CR>" command sequence but does not require the carriage return.
Because the "control C" is shorter than the ^D3 command sequence it is
easier to use in direct terminal mode. In general the ^D3 sequence is better to
use inside a format and/or program to assist in trouble-shooting the format.
^D Command Mode: Used to issue commands to the printer. This command is
normally preceded by the ^A sequence. The ^D commands must be
terminated with a carriage return or another command sequence
(^A9^D73^D3<CR> is the same as ^A9^D73<CR> and ^D3<CR>).
^E Printer Enquiry: This command is used to attain the current status or
operational state of the printer. The "^E" does not require a carriage return
and is the equivalent to the "^D5<CR>" command sequence. If Binary
Compression is enabled (default setting) the ^E and ^D5 commands will not
function. Five NULL characters (HEX 00) followed by a SOH (Hex 01) are
required to get the printer's status. (00 00 00 00 00 01) See 5.1.1 for
additional information regarding the Printer Enquiries.
^M Terminate Text or Data String: This command is the equivalent of the
carriage return character and is used to terminate commands and format lines.
^H Delete: This control code is used to delete the last printable character when
communicating to the printer through a keyboard via a terminal. The ^H is the
equivalent of the "Backspace" key on the keyboard.
^K Print Test Pattern: Used to generate a test pattern which consists of a series
of diagonal lines. The pattern is helpful in determining the condition of the
thermal dots on the print head. The ^K code is the equivalent of the "^D11
<CR>" command sequence.
^L Form Feed: Used to feed one blank form based on the previous format
configuration parameters. This command is the equivalent of the "^D12
<CR>" command sequence.
^Q XON: Instructs the printer to send data or resume sending data.
^S XOFF: Instructs the printer to stop sending data.
5 NULLS + 01: The 5 NULL method commands are a way to pass commands to the
printer even when the printer is configured in binary compression mode. The
command is sent to the printer as HEX characters; 00 00 00 00 00 01 are sent
to the printer in order to issue the command. This command is used to request
the printer's status and is very similar to the ^E command. The biggest
difference between this command and the ^E is that when printers are
configured for binary compression (D23 -SW3 bit 7), which is required if saving
graphics, the ^E will not function. This means that if the printer is going to be
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Chapter 5