Model 574 Programmable Counting System (PCS)
276 - GSE Scale Systems
to control the effective input signal to the simulator.
Since most load cells and platforms are rated in terms of
their milli-volt per volt (mV/V) output, most of the input
simulation keys change the signal in terms of a mv/v
amount. In addition, there are two keys which change
the simulated input signal by the smallest discernable
amount, one graduation (1 grad) of the indicator's A/D
converter. The keys used for the simulation are shown
above in the copy of the help file.
Also the ability to keyin a specific mV/V value or gross
or net weight is possible using the [ALT-M], [ALT-G]
and [ALT-N] key combinations respectively. Simply
press one of the key combinations and a window will
appear instructing you to keyin the appropriate value.
Then simply keyin the desired value and press [ENTER].
Whenever the simulated input signal is changed with one
of these keys, an additional line of information appears
below the numeric digits. This indicates the current
status of the simulated input, supplying the number of A/
D grads being simulated and the current level of the mV/
V signal being simulated. This can supply valuable
information when attempting to simulate a calibration
situation. Also it can be used to determine the number of
A/D graduations per displayed increment for a given
calibration.
30.5 File Re-Direction
Capturing Simulator Output:
The 574 simulator is
capable of making direct use of the comm ports on the
PC computer. Comm 1 is associated with the comm port
of a standard 574 and comm 2 (if applicable) is
associated with the printer port of a standard 574. All
"transmissions" performed by the simulator will always
be scrolled across a window on the screen and the data
may be captured to a disk file. The COMM and
PRINTER ports have separate screen windows. This file
may be viewed from within the simulator or the file may
be used with a communication program to transmit the
data after the simulator program is terminated. The
Comm 1 port of the PC is configurable as the bi-
directional port to the 574 simulator where as, Comm 2
port is configurable as the uni-directional port to the 574
similator.
Data is captured according to the 574 port which is
specified for the simulator's transmission. Data sent out
the print port is captured into one file while data sent out
the comm port is captured into another file.
To specify the file to which comm port data is captured
to, press [ALT]-[F2]. A screen will be displayed which
shows the status of all the file re-direction and it allows
you to specify a new file name. Simply enter the file
name and then set the file re-direction ON. Any
subsequent transmission out that port will be captured
into the specified file.
Similarly, to capture data sent out the comm port press
[ALT]-[F3].
This feature is employed to transfer setups from the
simulator to your target 574 instrument. Once the
simulator is setup as desired, simply specify a file for
either the print or comm port re-direction. Then go to the
setup download parameter, P64000, by keying in 64000
[SELECT]. Press [ENTER]. You will be prompted: "1
for COMM" followed quickly by "2 for Prntr". Press the
[1] or [2] key, depending on which port you specified for
re-direction. The setup will then commence being
downloaded to the specified file. After a few seconds of
inactivity or upon exiting the simulator, the file buffers
are flushed and the entire file is saved to disk.
Loading in a Setup File:
Similar to the 574 itself, the
574 simulator's setup can load its setup from a disk file.
Simply press [ALT]-[F1], specify the file name to be
loaded, turn the file on, and watch as the setup gets
loaded into the simulator. A small window will appear in
the lower right corner of screen specifying that an input
file is being processed. When the entire file has been
Figure 47 GSE 574 Simulator Computer Disk
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