Banner SureCross DX80 Wireless Networks - Manual (Page 10)

The baseline threshold/filter parameter sets a baseline threshold and filter activation time on M-GAGE devices. When M-GAGE input
readings are below the selected baseline threshold setting, the filter algorithm slowly lowers the magnetic baseline reading to zero to
remove small changes in the magnetic field over time. Setting options include the following values: (Parameter number 0x13).
Filter Threshold 30, 2 hour Two hours after the M-GAGE reading of the ambient magnetic field (baseline) has dropped below 30,
the algorithm begins to slowly lower the magnetic baseline reading to zero.
Filter Threshold 30, 8 hour Eight hours after the M-GAGE reading of the ambient magnetic field (baseline) has dropped below 30,
the algorithm begins to slowly lower the magnetic baseline reading to zero.
M-GAGE Baseline Filter (unrestricted). An M-GAGE only parameter, the baseline filter parameter sets the coefficient value of the base-
line filter algorithm. (Parameter number 0x15).
M-GAGE Low Pass Filter. The filters T0 through T6 are parameter settings that define the degree of input digital signal filtering for
analog inputs. T0 is the least amount of filtering. T6 is the highest filter setting and has the least amount of fluctuation between readings.
(Parameter number 0x12).
M-GAGE Report Rate (Inputs) . The report rate defines how often the Node communicates the I/O status to the Gateway. Change of
state reporting sets the system to report only when the value crosses the threshold setting. For FlexPower™ applications, setting the
report rate to a slower rate extends the battery life. (Parameter number 0x04).
M-GAGE Sample High and M-GAGE Sample Low. For analog inputs, the sample high parameter defines the number of consecutive
samples the input signal must be above the threshold before a signal is considered active. Sample low defines the number of consecutive
samples the input signal must be below the threshold minus hysteresis before a signal is considered deactivated. The sample high and
sample low parameters are used to avoid unwanted input transitions.
This parameter can be applied to a discrete input or a analog input using the threshold parameter. (Sample high parameter number 0x06,
Sample low parameter number: 0x07).
M-GAGE Sample Rate. The sample interval, or rate, defines how often the SureCross device samples the input. For battery-powered
applications, setting a slower rate extends the battery life. (Parameter number 0x03).
M-GAGE Threshold and M-GAGE Hysteresis. Threshold and hysteresis work together to establish the ON and OFF points of an ana-
log input. The threshold defines a trigger point or reporting threshold (ON point) for a sensor input. Setting a threshold establishes an ON
point. Hysteresis defines how far below the threshold the analog input is required to be before the input is considered OFF. A typical
hysteresis value is 10% to 20% of the unit’s range.
The M-GAGE Node’s threshold and hysteresis ranges are 0 to 65,535. The factory default threshold setting is 100 and default hysteresis
is 30 (the sensor detects an OFF condition at threshold minus hysteresis, or 100 - 30 = 70). With the default settings, once the magnetic
field reading is above 100, an ON or “1” is stored in the lowest significant bit (LSB) in the Modbus register. When the M-GAGE reading
drops below the OFF point (threshold minus hysteresis), the LSB of the Modbus register is set to “0.” To determine your threshold, take
M-GAGE readings of the test objects at the distance they are likely to be from the sensor. For example, if a car reads 100, a bicycle 15,
and a truck reads 200, setting the threshold to 150 will detect only trucks of a specific size. Magnetic field fluctuations vary based on the
amount of ferrous metal present and the distance from the sensor.
If the threshold parameter is 0, there is no threshold and the analog input will report based on the delta rate. Value range: 0 (disable,
default) through 65535 (two-byte value). (Threshold parameter number 0x08; Hysteresis parameter number 0x09).
I/O Types (Parameter 0x02)
The following inputs and output types are set using Device Config > Device Parameters screen of the User Configuration Tool. You may
also configure the I/O by sending Modbus commands from your host system.
Input Types
The following are the general input types.
Type # Description Type # Description Type # Description
Hex Dec Hex Dec Hex Dec
0x30 48 Analog IN 1 0x01 1 NPN IN 1 0x19 25 Multiple Discrete NPN
SureCross User Configuration Tool (UCT)
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