Yokogawa RotaMASS 3-Series - Manual (Page 118)

APPENdIX 1. LIST OF PArAMETErS FOr EACH BLOCK OF rOTAMASS
a-18 IM 01R04B05-00E-E 3rd edition July 30, 2010 -00 all Rights Reserved. Copyright © 2005, Rota Yokogawa
A1.4.2.3 Converting Accumulation
this following describes an example of accumulation
conversion.
In accumulation conversion the difference between
the value executed previously and the value ex-
ecuted this time is integrated or accumulated. this
conversion applies when the output of a function
block used as a counter is input to the input pro-
cess of the Integrator block.
In order to convert the rate of change of an input
to a value with an engineering unit, the user
must configure the factor of conversion to the appro-
priate engineering unit in the PuLSE_VaL1 and
PuLSE_VaL2 parameters.
Moreover, the unit of In_2 is standardized to
that of In_1 in the same way as rate conversion.
thus, the user must also set an appropriate value
to unIt_ConV.
input1
counts number of pulse kg
kg/pulse
increment1
increment2
lb/pulse
input2
counts number of pulse lb kg
[Current read value] – [Previous read value]
[Current read value] – [Previous read value]
PULSE_VAL1(#19)
3 [pulse value1]
PULSE_VAL2(#20)
3 [pulse value2]
UNIT_CONV(#18)
3 [conversion factor]
FA0203.EPS
Figure A2.3 Increment Calculation with Counter Input
A1.4.2.4 determining the Input Flow
direction
the Integrator block also considers the input flow
direction. Information about the input flow direc-
tion is contained in REV_FLoW1 ans REV_FLoW2
(0: FoRWaRD, 1: REVERSE).
In input processing, the sign of the value after rate
and accumulation conversion is reversed if the
REV_FLoW1 and REV_FLoW2 parameters are set
to REVERSE. When determination of the flow direction
of two input values is complete, these two inputs are
passed to the adder. the settings in REV_FLoW will
be retained even if power is turned oFF.
A1.4.3 Adder
When input processing is complete, two argu-
ments that have been rate and accumulate
converted will be passed to the adder. the adder
adds these two values according to the option.
A1.4.3.1 Status of Value after Addition
If one of the statuses of two arguments is "BaD" or if
two of them are both "BaD", the status of the value
after addition becomes "BaD". In this case, the value
of "GooD" just before the status changed to "BaD"
is used as the addition value (see a2.1).
When the statuses of two arguments are both
"GooD" the status of the value after addition becomes
"GooD". In this case, the status of the value after
addition will be used for the status applied to Integration.