A2.5 Output Process; A2.5.1 Status Determination - YOKOGAWA Admag TI Series User Manual

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 from 1 to 4.
In case that IT block related memory failed, the status of OUT, OUT_TRIP, OUT_PTRIP becomes
"Bad-Device Failure".
A2.5.1 Status Determination
The same criteria for determining the status of the output of the IT block are used in common for
the above three parameters.
Bad
0%
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
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 of each status to UNCERT_LIM and GOOD_LIM.
The IT block determines the status of the output using the three parameters: PCT_INCL,
UNCERT_LIM, and GOOD_LIM.
z PCT_INCL ≥ GOOD_LIM
=>Good
z UNCERT_LIM ≤ PCT_INCL < GOOD_LIM
=>Uncertain
z PCT_INCL < UNCERT_LIM
=>Bad
If INTEG_TYPE is 5, 6, or 7, the status of the trip output becomes "Good-NS-Constant".
Uncertain
UNCERT_LIM
PCT_INCL=1003(1 - (msp of RTotal)/(msp of ATotal))
<Appendix 2. Integrator (It) Block>
GOOD
GOOD_LIM
246
PCT_INCL
100%
FA0204.EPS
IM 01E21A02-03EN