Yokogawa AXFA14G/C Manual do Utilizador descarregar pdf (Página 70)

IM 01E20F02-01E

A-11

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.

In case of Integrator block related memory failed, the

status of OUT, 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% 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.

䊉 PCT_INCLGOOD_LIM

⇒Good

䊉 UNCERT_LIMPCT_INCLGOOD_LIM

⇒Uncertain

䊉 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=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

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.

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