Yokogawa RotaMASS 3-Series - Manual (Page 121)

APPENdIX 1. LIST OF PArAMETErS FOr EACH BLOCK OF rOTAMASS
a-21
IM 01R04B05-00E-E 3rd edition July 30, 2010 -00 all Rights Reserved. Copyright © 2005, Rota Yokogawa
A1.4.5 Output Process
there are the following three output parameters:
1. out
2. out_tRIP
3. out_PtRIP
Parameters out_tRIP and out_PtRIP are used
only when IntEG_tYPE is a value from 1 to 4.
In case of Integrator block related memory failed,
the status of out_tRIP, out_PtRIP becomes
"Bad-Device-Failure".
out.Value, out_tRIP.Status and out_PtRIP.
Status are determined by the ratio of the "GooD"
integrated values to all integrated values, which is
stored in PCt_InCL (0% to100%). the user must
set the threshold value of each status to
unCERt_LIM and GooD_LIM.
the integrator block determines the status of the
output using the three parameters:
PCt_LIM, unCERt_LIM and GooD_LIM.
• PCt_InCL >= GooDLIM ==> Good
• unCERt_LIM <= PCt_InCL < GooD_LIM
==> uncertain
• PCt_InCL < unCERt-LIM ==> Bad
If IntEG_tYPE is 5, 6 or 7, the status of the trip
output becomes "Good-nS-Constant".
0% UNCERT_LIM GOOD_LIM 100%
PCT_INCL
GOOD Uncertain Bad
PCT_INCL=1003(1 - (msp of RTotal)/(msp of ATotal))
msp of RTotal: RTotal value that is converted into a short floating-point number
msp of ATotal: ATotal value that is converted into a short floating-point number
RTotal: Integrated value of the absolute values of the increments whose status is bad
ATotal: Integrated value of the absolute values of the increments regardless of the output status
FA0204.EPS
Figure A2.4 Status of OUT_TrIP and OUT_PTrIP Outputs
A1.4.5.1 Status determination
the same criteria for determining the status of the
output of the Integrator block are used in common for
the above three parameters.