Appendix 6. Enhanced Arithmetic (Ar) Block; A6.1 Schematic Diagram Of Arithmetic Block - YOKOGAWA digitalYEWFLO Series User Manual

APPENDIX 6. Enhanced ARITHMETIC
(AR) BLOCK
The Arithmetic (AR) block switches two main inputs
of different measurement ranges seamlessly and
combines the result with three auxiliary inputs
through the selected compensation function (10
types) to calculate the output.
For the METHOD of AR block, read APPENDIX
10.2 "Enhanced AR Block."

A6.1 Schematic Diagram of Arithmetic Block

The diagram below shows the Arithmetic block schematic.
Input
RANGE_LO
IN
RANGE
EXTENSION
IN_LO
FUNCTION
IN_1
(IN_1+BIAS_IN_1) x GAIN_IN_1
IN_2
(IN_2+BIAS_IN_2) x GAIN_IN_2
IN_3
(IN_3+BIAS_IN_3) x GAIN_IN_3
BIAS_IN_i GAIN_IN_i
The Arithmetic block is divided into three sections:
• Input section: Makes a go/no-go decision on the
use of an input value, switches the range, and
determines the PV status.
• Computation section: Makes calculations
through ARITH_TYPE.
• Output section: Applies gain multiplication and
bias addition to the calculated result to perform
limitation processing for output.
<APPENDIX 6. Enhanced ARITHMETIC (AR) BLOCK>
Computing
ARITH_TYPE
RANGE_HI
PV
ARITH_TYPE
t_1
t_2
ARITH_TYPE
t_3
COMP_LO_LIM
Figure A6.1 AR Block
1 to 10
x GAIN
func
+ BIAS
32 to 36
COMP_HI_LIM
* The range extension function compensates the
IN and IN_LO input values when two devices with
different ranges are connected, to make smooth
input switching.
Output
OUT_HI_LIM
MAN
O/S
PRE_OUT
OUT_LO_LIM
FA0601.ai
IM 01F06F00-01EN
A6-1
OUT