9.5. DataSim - a data simulation program
DataSim is a data simulation program that creates local data
for the Cascade DataHub. It generates data for four different wave
patterns, and sends these to the DataHub by a TCP
connection.
As soon as DataSim starts, it attempts to connect to a
DataHub and begins generating data. To receive the data, the
Cascade DataHub should be set up as a mirroring master.
Connection Parameters
- Host
- The name or IP address of the host computer. Since
DataSim connects via TCP, this can be any computer on the
network running a Cascade DataHub acting as a mirroring master.
- Service
- The port number or service name as entered in the
Master service/port entry box of the
DataHub.
- Status
- Displays the attempts to connect, which change to
Connected when the connection is
made.
You can use the Reconnect button to
reconnect and the Pause button to freeze
all data generation. Press the Show
button to view and change some of the data parameters:
Configurable Options
The
following options can be set in DataSim, and sent to the
Cascade DataHub. All of the numeric options have a corresponding
point in the DataHub that contains the value. Thus, these
values can be set from within the Data Browser, by selecting the
point name and entering a new value for it.
- Waveform Parameters
- Amplitude
- The height of the wave forms. DataHub Point
name: DataSim/Amplitude.
- Offset
- An offset from zero of the generated data, and thus
the wave form. DataHub Point name:
DataSim/Offset.
- Frequecy
- The freqency of the wave form. DataHub Point
name: DataSim/Frequecy.
- Domain
- The Cascade DataHub domain name for the data points. Any
entry in this box changes the connection
Status to IDLE. You
must press the Reconnect button to
reestablish the connection.
- Update Frequency
- The number of times per second that data changes and
is sent to the Cascade DataHub.
- Apply Changes
- Applies any changes that have been entered for these
configurable options. This button is greyed out until a
change has been entered and can be applied.
Data Generation
For each of the
following four variables, the check box stops or starts data
generation, while the toggle button hides or shows the graph
display. The numerical value is shown at the right of the
graph.
- SIN
- Data generates a sine wave.
- SQR
- Data generates a square wave.
- TRI
- Data generates a triagular (45 degree) wave
pattern.
- RMP
- Data generates a ramp wave—steadily
increasing, followed by a sudden drop.
- Display Mode
- Controls how the data is displayed in the trend
display. Scroll moves the wave from
right to left as the data is generated. Old data scrolls
off the left side of the display as new data scrolls in
from the right. Wrap adds to the
wave from left to right, and writes over old data.
