Microcom 438TM Operator's Manual page 88

Printer Commands
the input is inactive, the "error" would need to be cleared before the
printer will continue. The ^D29 statistical listing reports the GP inputs
that are configured to generate error conditions when active and are
listed under the "ERROR INPUT: 0nH" with the value for "n" equaling
the HEX value of the inputs. The inputs equal a binary number with the
inputs in the following order; 4321.
Command Syntax:
^D151<CR>0n<CR>
n = the hex value from 0 to F.
Example: If the application wanted to configure inputs 1 and 3 to
generate error conditions when active, a ^D151<CR>05<CR>
command (the <CR> indicates carriage return characters) would be
issued. The printer ignores the LF characters, so a <CR+LF> is
interpreted as a <CR> as well) would be sent to the printer.
GP OUTPUTS:
The P21 connector is used to provide 4 general purpose outputs.
These outputs provide 24V and may be used to provide the voltage
needed to power the GP INPUTS.
The ^D69 command is used to read and report the current status of the
GP Outputs in the form of ">IO 0nH< where "n" is a hex number from 0
to F. The outputs equal a binary number with the values in the
following order; 4321.
Example: A status of >IO 05H< would indicate that outputs 1 and 3 are
active (24v) and that outputs 2 and 4 are inactive (0v); 05H =
0101(binary).
The ^D68 is a nonvolatile command used to enable which GP outputs
are active. The outputs are entered in as a HEX value that is equal to a
binary number with the outputs in the following order; 4321.
Command Syntax:
^D68<CR>0n<CR>
n = the hex value from 0 to F.
Example: If the application wanted to configure outputs 1 and 3 active,
a ^D68<CR>05<CR> command (the <CR> indicates carriage return
characters) would be issued. The printer ignores the LF characters, so
a <CR+LF> is interpreted as a <CR> as well) would be sent to the
printer.
NOTE: A status request (^E, ^D5, or 5 NULL's 01) will never show the
status of the outputs while a status request will show the input status if:
1) GP I/O is enabled AND
5-20 438TM Operator's Manual - 880049-0113
Chapter 5