Yokogawa RotaMASS 3-Series - Manual (Page 145)

APPENdIX 4. FUNCTION dIAGrAMS OF FUNCTION BLOCKS
a-45 IM 01R04B05-00E-E 3rd edition July 30, 2010 -00 all Rights Reserved. Copyright © 2005, Rota Yokogawa
APPENdIX 4. FUNCTION dIAGrAMS OF
FUNCTION BLOCKS
A4.1 AI Function Block
Fa0401.EPS
aI transducer out
Figure A4-1. Input/Output of AI Block
output
out
FIELD_VaL.Value L_tYPE
/100
/100
Ind.Sqr Root
Indirect
Direct
Simulate
SIMuLatE
Scaling
XD_SCaLE
Scaling
out_SCaLE
alarms
HI/Lo
MoDE
Filter
PV_FtIME
CHannEL PV
Cutoff
LoW_Cut
Fa0402.EPS

Figure A4-2. Function diagram of AI Block
Calculation of Output value:
FIELd_VAL.Value
= 100*(tB value - XD_SCaLE.Eu0) / (XD_SCaLE.Eu100 - XD_SCaLE.Eu0)
AI Parameter L_TyPE (relative Index 16):
direct: PV.Value (OUT.Value)
= tB value
Indirect: PV.Value (OUT.Value)
= (FIELD_VaL.Value/100) * (out_SCaLE.Eu100 - out_SCaLE.Eu0) + out_SCaLE.Eu0
Indirect Sqr root: PV.Value (OUT.Value)
= sqrt(FIELD_VaL.Value/100) * (out_SCaLE.Eu100 - out_SCaLE.Eu0)+ out_SCaLE.Eu0