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accumulator.valueBeforeChange |
According to the BACnet protocol documentation:
Indicates the value of the presentValue property just prior to the most recent write to the valueSet or valueBeforeChange properties.
Property valueBeforeChange of object accumulator can be read and written using a single IOTag.
Property |
Value |
ParamDevice |
<deviceAddress> |
ParamItem |
accumulator-<objectAddress>.valueBeforeChange |
Property |
Value |
N1: |
<deviceAddress> |
N2: |
<type> = 23 |
N3: |
<objectAddress> |
N4: |
<property> = 190 |
A 32-bit unsigned integer.