Banner Sure Cross DX80 Instruction Manual page 25

Units Description
8 Signed Analog, 4
to 20 mA (A)
9 Signed Analog, 4
to 20 mA (B)
10 Unsigned Analog,
0 to 10 V
11 Counter, 16-bit
12 Unsigned Analog,
4 to 20 mA
Interpreting Register Values in the Banner Wireless System
The units conversion table defines the type and range of values for each type of I/O.
The wireless devices have many different units of measure for inputs including: milliamp (mA), voltage (V), temperature (°C
or °F), humidity (RH), or a raw 16-bit or 32-bit value. Outputs can be either current (4 to 20 mA, 0 to 20 mA) or voltage (0 to
10 V dc). All values stored in Modbus registers are unsigned numbers, except for temperature readings. The temperature
readings are stored as signed numbers (two's complement).
The following table defines the range of values and descriptions for input units.
Input Type
Min.
Discrete
0 to 20 mA 0.0 mA
4 to 20 mA 4.0 mA
0 to 10 V dc 0.0 V dc
Temp C/F (high resolution) –1638.3
Counter
16-bit T30UF 0 mm
Humidity 0% RH
Temperature Measurements:
• In high resolution mode, the temperature = (Modbus register value) ÷ 20. For high resolution temperature input, 0 in
the register is interpreted as 0° and 65535 in the register (0xFFFF) is interpreted as −1 ÷ 20 = −0.05°.
• In low resolution mode, the temperature is (Modbus register value) ÷ 2. For low resolution temperature input, 0 in the
register is interpreted as 0° and 65535 in the register (0xFFFF) is interpreted as −1 ÷ 2 = −0.5°. The I/O range values
are –16383 through 16384.
Definition
In older models, this units type is for degree Celsius conversions only. Use null to set the start point and span to define
the range. The null value is the starting temperature to be associated with 4 mA. The span is the entire temperature
range that is to be associated with 4 to 20 mA. For newer firmware models, type codes 8 and 9 are treated the same.
LCD: 4.00mA–20.00mA
In older models, this units type is for degree Fahrenheit conversions only. Use null to set the start point and span to
define the range. The null value is the starting temperature to be associated with 4 mA. The span is the entire
temperature range that is to be associated with 4 to 20 mA. For newer firmware models, type codes 8 and 9 are treated
the same.
LCD: 4.00mA–20.00mA
For an unsigned value, such as 0 to 20 mA, that is to be converted to a voltage out value. Use the null to set the start
point and span to define the range. The null value is the distance to be associated with 0V. The span is the entire
distance range that is to be associated with 0 to 10 V.
LCD: 0.00V–10.00V
The 16-bit counter value records counts up to 65535.
LCD: 0000
For an unsigned value, such as 0 to 10 V, that is to be converted to a mA out value. Use the null to set the start point and
span to define the range. The null value is the distance to be associated with 4 mA. The span is the entire distance range
that is to be associated with 4 to 20 mA.
LCD: 4.00mA–20.00mA
Holding Register
I/O Range
Representation
Max. Min.
0 1 0
20.0 mA 0
20.0 mA 0
10.0 V dc 0
+1638.4 0
0 65535 0
65535 mm 0
100% RH 0
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Sure Cross
Data Conversion
Max.
1 -
65535 (20 mA ÷ 65535) × Reg Value = mA
((16 mA ÷ 65535) × Reg Value) + 4 =
65535
mA
65535 (10 V ÷ 65535) × Reg Value = V
65535 (Converted Reg Value) ÷ 20 = Temp
65535 -
65535 None; stored as millimeter value
(Reg Value) ÷ 100 = Relative Humidity
10000
(RH)
®
Radio Networks and Host Controller Systems
Description
-
Linear mapping of unsigned register
value to current
Linear mapping of unsigned register
value to current
Linear mapping of unsigned register
value to voltage
Signed Values
-
Unsigned
Unsigned
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