Black Box PS035A - Manual (Page 22)

PQ-6 PLUS (RO)
21
When selecting printer type, the following data is used by the PQ-6 PLUS:
6 LPI
8 LPI
10 CPI
15 CPI
If you select a generic printer, the data used is located at 3400H and must be entered in the EPROM (see
Section 3.3.3 ).
To cancel a print job sent from the host, press and hold the STOP button on the PQ-6 Plus (RO) front
panel, and press the START button simultaneously. This sends a cancel request to the host, ending the print
job.
4.3 Command Pass-Through
The command pass-through feature in the PQ-6 PLUS (RO) lets you (or a programmer) control an attached
printer so that you can use special functions or features of the printer. It’s required because the IBM System 3X
operating software will not allow codes below Hex 40 to be transmitted on the twinax cable.
The method will transmit any 8-bit binary value from Hex 00 to Hex FF. The PQ-6 does not interpret or
translate data when in command pass-through mode.
To enter command pass-through mode, send the two-character sequence ampersand percent (&%) as part
of the normal printable data.
NOTE
Ampersand (&)=EBCDIC 50 Hex
Percent (%)=EBCDIC 6C Hex
After it enters command pass through mode, the PQ-6 PLUS (RO) takes characters from its internal print
buffer and outputs a single 8-bit binary value for every two EBCDIC characters it receives. The two EBCDIC
characters should embody the Hex representation of a legal 8-bit value.
Example: To send an ASCII escape character (1B Hex), send the two-character sequence ampersand percent
as a terminating character pair.
NOTE
No gaps or spaces should occur between any characters during command pass
through mode.
To send the sequence of ASCII characters “ABC (space) 1 2 3,” the following command pass-through
sequence would be sent:
EBCDIC - & % 4 1 4 2 4 3 2 0 3 1 3 2 3 3 & %
Hex - 50 6C F4 F1 F4 F2 F4 F3 F2 F0 F3 F1 F3 F2 F3 F3 50 6C