Universal Input Parameter Modbus Registers
Universal Inputs
1
2
3
4
5
6
7
8
Enable Falling
4909
4929
4949
4969
4989
5009
5029
5049
High Register for Counter
4910
4930
4950
4970
4990
5010
5030
5050
Low Register for Counter
4911
4931
4951
4971
4991
5011
5031
5051
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, 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.
Universal Input Register Ranges
Register Types
Unit
Minimum Value
Maximum Value
Discrete input/output
0
1
Universal input 0 to 10 V
mV
0
10000 *
Universal input 0 to 20 mA
µA
0
20000 *
Universal input temperature (–40 °C to +85 °C)
C or F, signed, in tenths of a degree
–400
850
Universal potentiometer
unsigned
0
65535
DXM150-Sx Wireless Modbus Slave
20
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