Novatech Bitronics M87X Series Manual page 82

specifies. On the way up, the threshold is passed at the value + 1% nominal.
For Swells, the threshold is passed going up on the value the user specifies. On the way
down, the threshold is passed at the value – 1% nominal.
The Voltage Fluctuation Table consists of 2 files:.
- VFTn.DAT
- VFTn.INI
Where n is the number of the bus. Currently n may be 1 or 2.
The DAT file is a text file with one entry per line. Each data value is separated by a
semicolon. The order of the data values is
- Entry Number
- Time Tag seconds
- Time Tag milliseconds
- Phase Code
- Minimum Value
- Maximum Value
- Current value, that has passed threshold
- Voltage Ratio
- Ratio Offset
An example of 1 line
1803;351009204;335;20001002;55.734;55.734;79.932;1.0;0.0
The DAT file will be allowed to grow to 100K. This will result in proximally 1700 entries.
Due to flash drive limitations, the M87x can only have a finite number of entries. To
prevent the file from growing too large, and ensure the newest data is always available, the
M87x overwrites the oldest entry as needed.
Because the DAT file will be circular it will have a virtual end of file marker, thus making it
easy to see where the oldest entry is. The end of file marker will be "**** End of File ****"
with out the quotes, and it will be on a line by itself.
A new "Voltage Fluctuation Thresholds" page in the 70 Series Configurator was created
that allows the user to configure the Voltage Fluctuation Table. The user has the following
options for each bus.
Enable/Disable the Voltage Fluctuation Table
Set the nominal voltage in primary units
Set the thresholds (can have 3-30 thresholds) entered in % of nominal
The files for the Voltage Fluctuation Table are available to download via Ethernet or Serial
ports using BiView, Retriever, Internet Explorer, and HyperTerminal, Zmodem, FTP. The
files are not available via Modbus File Transfer.
ML0021 August 15, 2018
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