AMI 186, Инструкции по установке, эксплуатации и обслуживанию

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Virtual Instrument Operation
IEEE-488 Virtual Instrument
selected, the VI will initialize all settings from the actual instrument. If the No option
is selected, the user should enter all data in the control fields ( Sensor Length , Hi
Setpoint , etc.) in the indicated units. The user should also select the correct GPIB bus
and primary address (see page 39 for instructions on setting the Model 186 primary
address). If only one GPIB interface is present in the host computer, the GPIB bus is
normally set to 0. Refer to your LabVIEW documentation for more information on
how to determine the GPIB bus setting appropriate for your computer. After setting
the initialization parameters, the user may then start the VI. Please refer to your
LabVIEW documentation for instructions on how to start and control the execution of
VI’s.
Interacting with the running VI
While the VI is running the user may manipulate the virtual toggle and rotary switches
in the same manner as required for the front panel operation of the actual instrument.
See the Operation section of this manual for instructions on operating the front panel
controls, however, please note that there are some minor differences discussed below.
The RAISE/LOWER toggle switch functions slightly different in the VI. If the
RAISE/LOWER toggle switch is moved from the center position to the RAISE or
LOWER position, then the display changes to show the appropriate parameter. After
approximately 4 seconds in the RAISE or LOWER position, the display will begin
incrementing or decrementing by tenths. After approximately 12 additional seconds,
the display will begin incrementing/decrementing by ones. Move the RAISE/LOWER
toggle switch back to the center position to stop the incrementing or decrementing
function.
The virtual instrument’s FILL LED indicator is only accurate if the fill toggle switch
is in the AUTO position. There is no remote monitoring or control of the manual
override states of the fill toggle switch available through the communication
command set.
As a more convenient option for controlling the settings, the user may scroll to the
area above the VI and enter the values for the Sensor Length, Hi Setpoint, A Setpoint,
B Setpoint, Lo Setpoint, and Fill Interval directly in the control fields (please observe
the specified units). Any changes in the fields are recognized and sent to the actual
instrument in the form of the appropriate command string. Any settings changed by
the VI virtual panel toggle switches or control fields are saved in permanent memory
in the actual instrument. The control fields and toggle switches function whether the
VI is run exclusively or non-exclusively on the GPIB bus.
If the VI is executed exclusively, then the VI may be gracefully stopped by using the
STOP toggle switch in the lower left corner of the VI. After stopping the VI, this
switch must be placed back in the up position in order to restart the VI. If you are
executing the VI in a non-exclusive polling loop on the GPIB bus, then the STOP
toggle switch has no function and the user should control the execution of the VI from
the controlling parent VI(s).