YOKOGAWA DpharpEJX vigilantplant EJX Series - A2.5 Output Process; A2.5.1 Status Determination

IM 01C25T02-01E
A-14
Appendix 2. Integrator (IT) Block
A2.5 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.
A2.5.1 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.
0% UNCERT_LIM GOOD_LIM 100%
PCT_INCL
GOOD
Uncertain
Bad
PCT_INCL=100(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, OUT_TRIP, and OUT_PTRIP Outputs
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% to 100%). 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_INCL,
UNCERT_LIM, and GOOD_LIM.
 PCT_INCLGOOD_LIM
⇒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."