DayTronic 3500 Series, Instruction Manual

Page: 90 / 122

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There are two ways you can cause your 3500 instrument to output formatted data
from its RS-232/485 Interface Port according to the time interval specified by the
operator (Section 3.a.10), WHEN THAT PORT IS SET TO RS-232 MODE*:
1. By the front-panel PRINT button WHEN THE "PRINT" TERMINAL OF THE REAR
LOGIC I/O CONNECTOR IS AT "LOGIC 0" AND THE FOLLOWING PRINT
ENABLE (PRN) COMMAND IS IN EFFECT:
PRN=ON [CMT]
Pressing this button once will initiate RS-232 transmissions at the specified
interval. Pressing it once more will halt any transmission in progress at the
end of the line currently being sent.
2. By a LOGIC-STATE TRANSITION at the "PRINT" terminal of the rear Logic I/O
Connector WHEN THE
PRN=ON [CMT] COMMAND IS IN EFFECT. Thus, a
transition from Logic 0 to Logic 1 at the "PRINT" terminal will initiate RS-232
transmissions at the specified interval, while a transition from Logic 1 to Logic
0 will halt any transmission in progress.
When the print transmissions are started by setting the "PRINT" terminal to Logic
1, the
PRINT button is disabled, and a transmission can only be stopped by reset-
ting the "PRINT" terminal to Logic 0 or by issuing a command of
PRN=OFF [CMT]
As you can see, the PRINT ENABLE (PRN) command serves only to enable (or
disable) the automatic print function. It does not itself initiate or halt data trans-
missions, and has no effect on the operation of the
CHANNEL (CHN) or DUMP
(DMP) commands.
NOTE: The PRN setting is not saved to EEPROM. THIS IS STRICTLY A "RUN-
TIME" COMMAND, THE POWERUP DEFAULT BEING ALWAYS PRN=ON [CMT] .
Therefore, the unit is always ready to print as soon as it is turned on, and you can
enable (or re-enable) the print function at any time just by turning the unit off and
on.
5.6
5
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5.d I
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* The front-panel PRINT button and the automatic print function are disabled when the unit is
in RS-485 ("MULTINODE") MODE. To send formatted data only once to a connected printer,
you can always use the
CHANNEL (CHN) or DUMP (DMP) command as explained in Sec-
tion 5.a.