7 Remote Control by Program
7.1 General Information
A remote control of the universal counter by a personal computer is possible via the serial
interface RS-232C. The interface of the personal computer has to have the configuration
described under 4.6.
All parameter settings, measuring functions and measuring value outputs can be realized via
remote control. The setting of the trigger level is the exception to this; it has to be done
manually.
7.2 Preparation on the Counter
7.2.1 Test of the Data Transmission Line
A testing device is necessary for checking the serial interface RS-232C on the counter. This is
a plug with the connection pins of the data lines RXD and TXD as well as RTS and CTS
being connected. The simultaneous pressing of the buttons “MEAS/LOCAL” [7] and “GATE
TIME” [5] starts the test. The message “Test RS 232C: ERR!” documents an interface error.
On pressing the button “MEAS/LOCAL” the former operation mode is called up.
7.2.2 Preparations for the Remote Control
Several parameters can be set before switching to remote control. The simultaneous pressing
of the buttons “MEAS/LOCAL” [7] and “FUNCTION” [4] causes the assignment of new
functions to the buttons “FUNCTION”, “GATE TIME” and “MEAS/LOCAL”. The names
“Set”, “Test” and “Exit” stand above them on the display.
The transmission rates “Baud Rate: 1200”, “Baud Rate: 2400”, “Baud Rate: 4800”
and “Baud Rate: 9600” can be adjusted by repeated pressing of the button
“FUNCTION” (Set). The value is saved with the help of the button
“MEAS/LOCAL” (Exit) and the former operation mode is called up again.
The unit's internal test is switched on by actuating the button “GATE TIME” (Test).
The units involved in the remote control are checked then. The same messages
appear as when the unit is switched on (see 6.1).
16
Operating Instructions UZ 2400
1/2000
