Universal Input Parameters Registers
Universal Inputs
1
2
3
4
Enable Full Scale Registers
3303
3323
3343
3363
Temperature °C/°F Registers
3304
3324
3344
3364
Input Type Registers
3306
3326
3346
3366
Threshold Registers
3308
3328
3348
3368
Hysteresis Registers
3309
3329
3349
3369
Enable Rising Registers
4908
4928
4948
4968
Enable Falling Registers
4909
4929
4949
4969
High Register for Counter Registers
4910
4930
4950
4970
Low Register for Counter Registers
4911
4931
4951
4971
Enable Full Scale
Set to 1 to enable a linear range from 0 to 65535 for specified input range. For a 4 to 20 mA input, a value of 0
represents 4 mA and 65535 represents 20 mA. Set this parameter to 0 to store input readings in unit-specific
data. For example, the register data representing a 15.53 mA reading is 15530. For units of current (0 to 20 mA
inputs), values are stored as µA (micro Amps) and voltage values are stored as mV (millivolts).
Enable Rising/Falling
Use these registers to enable the universal input logic to count on a rising transition or a falling transition. Write a
one (1) to enable; write a zero (0) to disable.
High/Low Register for Counter
The low and high registers for the counter hold the 32-bit counter value. To erase the counter, write zeroes to
both registers. To preset a counter value, write that value to the appropriate register.
Hysteresis and Threshold
Threshold and hysteresis work together to establish the ON and OFF points of an analog 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.
Threshold
ON point
Time
Input V
alue
Input
Hysteresis
OFF point
In the example shown graphically, the input is considered on at
15 mA. To consider the input off at 13 mA, set the hysteresis to
2 mA. The input will be considered off when the value is 2 mA
less than the threshold.
Input Type
Program the universal inputs to accept input types NPN, PNP, 10k thermistor, 0 to 10 V, 0 to 20 mA, or
potentiometer. The default setting is 8: NPN raw fast. To set the input type, write the following values to the Input
Type Modbus registers.
0 = NPN
1 = PNP
2 = 0 to 20 mA
3 = 0 to 10 V dc
4 = 10k Thermistor
5 = Potentiometer Sense (DXM150 only)
6 = Not used
7 = Bridge
8 = NPN Raw Fast (default)
Temperature °C/°F
Set to 1 to represent temperature units in degrees Fahrenheit, and set to 0 (default) to represent temperature
units in degrees Celsius.
DXM100-Bx Wireless Controller Instruction Manual
52
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