Microcom 438 - Manual (Page 71)

Printer Commands Chapter 5
5-24 438 Operator’s Manual - 880052-0100
Printer Model Dots/Inch D79 value
224 203 448
224 300 640
324M 203 640
324M 300 960
424 203 832
424 300 1280
424M 203 832
424M 300 1280
X28 203 832
X28 300 1280
Table 5-4 Printhead sizes - D78
These are examples of how to use the ^D78 and ^D79 commands:
EXAMPLE #1: How to set the printer for a 640 dot, 300 dpi print head:
^A1^D79 (Sets 300 dpi)
^A640^D78 (Sets 640 dots)
EXAMPLE #2: How to set the printer for an 832 dot, 203 dpi print head:
^A0^D79 (Sets 203 dpi)
^A832^D78 (Sets 832 dots)
5.3 General Purpose I/O
When this command is enabled (Switch 6 bit 6; D26 command), the printer provides the
ability to report the current status of 4 additional inputs accessed through the P17 connector
on the PCB, report the status of 4 additional outputs accessed through the P21 connector
on the PCB, to change the status of the outputs, and to configure the inputs to generate
immediate errors.
^A
^D Command
XX 110 General Purpose Status Byte
The printer has a special mode of communication for General Purpose control
environments. Communication is over the Ethernet port and uses the
following protocol.
The host sends a command byte to the Ethernet port every few milliseconds.
The printer’s Ethernet interface will pass the command byte on to the printer
only when there is a change, i.e., when there is a new command.
The printer sends a byte of status data to its Ethernet interface using the same
data format, and will only send the data when there is a change in status. The
printer’s Ethernet interface will send the printer status byte to the HOST every
few milliseconds.