<Appendix 3. Arithmetic (Ar) Block>
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IM 01E21A02-03EN
Appendix 3. Arithmetic (AR) Block
The AR block switches two main inputs of different measurement ranges bumplessly and
combines the result with three auxiliary inputs through the selected compensation function (10
types) to calculate the output.
A3.1 Functional Block Diagram
The diagram below shows the functional block diagram of the AR block.
FA0301.EPS
The AR block is divided into three sections to explain each function.
1. Input section...Makes a go/no-go decision on the use of an input value, switches the
range, and determines the PV status.
2. Computation section...Makes calculations through ARITH_TYPE.
3. Output section...
Applies GAIN multiplication and BIAS addition to the calculated result to perform
limitation processing for output.
*
The range extension function compensates the IN and IN_LO input values and realizes
smooth input switching when two devices with different ranges are connected.