LVMAC™ Software - Radio Modem HMI
LVMAC™ is the Supervisory Control and Data Acquisition System (SCADA) radio driver software located on the hard drive of the System
Control Computer (SCC). It is the user interface for the SCC communications to the RTUs located at remote sites or for any
communication locally at the Base Station through the SCC's serial port. DFA developed the LVMAC™ software using
National Instruments, LabVIEW®, a leading industry standard process control
language.
The Default LVMAC™ screen is the graphical representation of the light emitting diodes (LEDs) on the door of the BRM enclosure.
The LEDs are used to view the communication process between the SCC and the remote terminal units (RTUs) being polled.
In the screen below Salmon Creek site is the current remote site being polled.
The function of the diodes on the door of the Base Radio Modem (BRM) and in the LVMAC™ software graphical representation
is as follows:
- PPT - Push to Talk - When PPT diode is lite, the SCC is sending data to a remote site or RTU.
- RFC - Radio Frequency Carrier - When the RFC diode is lite, the remote site or RTU is receiving data from the SCC.
- AUDIO - Audio Frequency Carrier - When AUDIO diode is lite, the actual audible portion of the radio signal or data has been received.
In actual operation, the RFC and AUDIO diodes generally light together.
- POWER - DC power is present in the Base Radio Modem (BRM) when lite.
- AC FAIL - When flashing the Base Radio Modem has lost AC power.
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Some features of the DFA LVMAC™ software:
- Poll Queue - the remote sites queued in polling order. In the above screen, Salmon Creek is the only site in the
poll queue.
- Push Button Menu on the main screen for access to the remote site communication configuration, polling statistics,
to manually poll individual stations or all stations, clear poll queue, ability to remotely load RTU programs, and etc.
- In and Out Buffers - are on the main screen face and visible to the user and showing all data being sent or
received in hexadecimal format accompanied by the name of station being polled.
- Good Data LED when lite indicates that the data received is valid data.
- Status Indicators - for polling, status of the radio modem's serial port, and if the system has a SCC and a stand-by
computer, the communication status between the SCC and the stand-by computer.
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