Yokogawa RotaMASS 3-Series - Manual (Page 117)

APPENdIX 1. LIST OF PArAMETErS FOr EACH BLOCK OF rOTAMASS
a-17
IM 01R04B05-00E-E 3rd edition July 30, 2010 -00 all Rights Reserved. Copyright © 2005, Rota Yokogawa
A1.4.2 Input process Section
When executed, the Integrator block first performs input processing in the order of:
"Determining input status" ==> Converting rate or accum ==> " Determining the input flow direction"
Switching between Convert Rate and Convert accum is made using bit 0 (for In_1) or bit 1 (for In_2) of
IntEG_oPtS. IntEG_oPtS is one of the system parameters and should be set by the user. the values
of In_1 and In_2 are not retained if the power is turned oFF.
A1.4.2.1 determining Input Value Statuses
the following shows the correlation between the statuses of input parameters (In_1 , In_2) and the sta-
tuses if Input values used in the Integration block.
Statuses of Input
Parameters (IN_1, IN_2) Bit 4 of INTEG_OPTS
(Use Uncertain) Bit 5* of INTEG_OPTS
(Use Bad) Status of Input Values
Handled in IT Block
Good Irrelevant Irrelevant Good
Bad Irrelevant H (=1) Good
Bad Irrelevant L (=0) Bad
Uncertain H (=1) Irrelevant Good
Uncertain L (=0) Irrelevant Bad
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For addition (see a2.3), if the status of an input value is "BaD" the "GooD" value just before the status
changed to "BaD" is used.
* Even if the use Bad option is used, changing the internal status to "GooD" the value of "GooD" just
before the status change to "BaD" is used.
A1.4.2.2 Converting the rate
the following describes an example of rate con-
version.
In rate conversion, firstly convert the unit of two
inputs to that based on seconds.
next, convert the unit of the inputs to the same
units to be added together. the unit of In_2 is
standardized to that of In_1. then, calculates a
weight, volume or energy by multiplying each input
value and block execution time. Because unit in-
formation is not input to the Integrator block as an
input value, the user must input in advance tuned
values to the tIME_unIt1/2 and unIt_ConV
parameters.
tIME_unIt1
sec:1
min:60
hour:3600
day:86400
input1
kg/hour
input2
lb/s kg/s kg
increment2
increment1
lb/min
lb: pounds
Converts the unit into
that based on seconds
Standardizes the unit of
In_2 to that of In_1.
Because "lb/s" is converted into
"kg/s" in this example, the input
2 value is multiplied by 0.453.
(1 lb = 0.453 kg)
unIt_ConV
x [conversion factor]
(Conversion factor:
0.453 in this example)
Converts the unit into
that based on seconds
tIME_unIt2
sec:1
min:60
hour:3600
day:86400
kg/s kg
3 block execution time
3 block execution time
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Figure A2.2 Increment Calculation with rate Input