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Device Control
When doing data logging in remote mode, the terminal and
host computer must be using
ENQ-ACK
or another pacing
mechanism or they must be using a baud rate that is equal
to or less than the rate at which the slowest selected printer
can function (for individual lines being logged sporadically
on the integral printer, 1200 baud may work; for a series of
successive lines, however, you will probably have to drop to
600 baud).
From the keyboard, you enable and disable data logging
using the
"LOG TOP" (m)
and
"LOG BOTTOM" (m)
keys.
These keys alternately enable and disable top logging and
bottom logging, respectively. When either is enabled, an
asterisk appears in the associated key label.
From a program executing in a host computer, you enable
and disable data logging using the following escape se-
quences:
ENABLE BOTTOM LOGGING:
<ESC>&p11 C
ENABLE TOP LOGGING:
<ESG>&p12C
DISABLE LOGGING:
<ESC>&p13C
Both forms of data logging may NOT be enabled simul-
taneously.
Once either form of data logging is enabled, it remains
enabled until explicitly disabled, until the other form of
data logging is enabled, until a hard reset is performed, or
until the power is turned off.
Note that the keyboard is temporarily locked while a line of
data is being "logged". This may make it difficult to per-
form any keyboard operations if a large quantity of data is
coming into display memory over a data comm line rapidly
enough to result in continuous logging.
PRINTER SELF-TEST
The terminal includes a printer self-test feature that ex-
ercises the integral printer to verify that it is functioning
properly.
From the keyboard you initiate the printer self-test using
the following keystroke sequence:
•
service
keys
INT PRT
TEST
If
the printer is functioning properly, it generates the test
pattern shown in figure 6-3.
If your terminal does not include the optional thermal
printer, t h e " key label in the
"service keys"
set is
blank.
If
an error condition is detected while the test is being
executed, the message
"Integral printer error"
or
"PR I NTER"
appears at the bottom of the screen where the.
function key labels normally appear. To clear the message,
press _ . Note that the error condition may be either of
the following, in which case you could correct it yourself.
(
1.
Out of paper.
(.
2. The metal latch (under the plastic printer lid) is not
.
pressed down securely. See figure 6-4.
The printer self-test cannot be initiated programmatically.
Figure 6-3. Integral Printer Self-Test Output
(
6-6
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