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7.4 I/O Base Board (Modbus Slave 200)
Base Board Input Connection
Modbus Register
Description
1
Universal input 1
2
Universal input 2
3
Universal input 3
4
Universal input 4
Base Board Output Connection
Modbus Register
Description
501
NMOS Output 1
502
NMOS Output 2
503
NMOS Output 3
504
NMOS Output 4
505
Switched Power 1 (5 V or 16 V)
506
Switched Power 2 (5 V or 16 V)
507
DAC Output 1
508
DAC Output 2
7.4 Input/Output Parameter Modbus Registers
Universal Input Parameter Modbus Registers
Universal Inputs
1
2
3
4
Enable Full Scale
3303
3323
3343
3363
Temperature °C/°F
3304
3324
3344
3364
Input Type
3306
3326
3346
3366
Threshold
3308
3328
3348
3368
Hysteresis
3309
3329
3349
3369
Enable Rising
4908
4928
4948
4968
Enable Falling
4909
4929
4949
4969
High Register for Counter
4910
4930
4950
4970
Low Register for Counter
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.
DXM100 Controller Instruction Manual
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