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7 BACnet Communication
Analog Input Object
Present_Value of the Analog Input object can be set to a fixed value or allocated device addresses and set to the
value of those device address. Present_Value is a Float32(F) numeric value. When device addresses are allocated to
Present_Value, Present_Value is set to the product of those device addresses multiplied by the coefficient.
The following diagram illustrates the concept when device addresses are allocated to Present_Value of the Analog
Input object and the BACnet device reads out the analog input value.
BACnet device
Read value:
10.0
Read from BACnet device
When writing the value of device addresses as Present_Value, Present_Value changes in the following manner.
Data Type
UBIN16(W)
BIN16(I)
UBIN32(D)
BIN32(L)
Float32(F)
3-136
MICRO/I
BACnet objects
Reflected
Analog Input
object
Present_Value:
10.0
Write value of data register
Value of Device Addresses
Value within range of each data type
±0
Denormalized number
Normalized number
±∞ (±infinity)
Non-number
WindO/I-NV4 User's Manual
Analog input module
Device addresses
#D0000: 1000
Coefficient: 0.01
Present_Value of BACnet Device
Value of Device Addresses
±0.0
Value of Device Addresses
Present_Value does not change
Physical input
External
analog input:
10 V
CH0: 10 V
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