Yokogawa DCS system parameters and alarm instructions

Author: zhddq
Published on: 2025-02-13
Category: Industry News

Henghe DCS system instrument panel status

Instrument circuit status

MAN

Manual state

RCAS

Remote cascading status

AUT

Automatic state

PRD

Primary direct regulation

CAS

Cascade state

CAL

Instrument calibration mode

 

    Internal parameters of Yokogawa DCS system instrument panel

PV

Process measurement values

GW

broadband

SV

set value

DB

dead zone

MV

Output Value

CK

gain

P

proportion

CB

deviation compensation

I

points

DL

Deviation alarm setting

D

differential

VL

Change rate alarm setting

SVL

Set the lower limit position

HH

High high alarm setting

SVH

Set high limit position

PH

High alarm setting

OPHI

Output high limit index

PL

Low alarm setting

OPLO

Output low limit index

LL

Low low alarm setting

MSH

MV range upper limit

PMV

Pre set output settings for use with PSW=3

MSL

MV range lower limit

SUM

Accumulated traffic value

SL

PV range low limit

 RAW

Process measurement values input raw values (-25~125)

SH

PV range high limit

ONTM

Running time (seconds)

ONCT

Start/Stop Count

ONTH

Running time (hours)

ONTS

Run time (in seconds)

   

 

           Henghe DCS system instrument alarm

NR

Alarm status is normal

IOP-

Input open circuit or input less than the set detection open circuit value

IOP

Input greater than the set maximum detection current value

OOP

Output circuit breaker

HH

Process measurement value high high alarm

HI

High process measurement value alarm

LO

Low process measurement value alarm

LL

Process measurement value low low alarm

ANS+

The response message is abnormal, MV=2

ANS-

The return message is abnormal, MV=0

PERR

The presence or absence of switch feedback can be modified according to the actual situation

MHI

Valve output upper limit, suitable for AUT&CAS mode

MLO

Valve output lower limit, suitable for AUT&CAS mode

DV+

Positive deviation alarm

DV-

Negative deviation alarm

VEL+

Positive rate of change alarm

VEL-

Negative rate of change alarm

ALM

AN alarm, suitable for digital quantity alarm

CNF

Instrument connection error alarm

TRIP

Instrument connection error alarm

AOF

Alarm blocking (screen blocking, still recorded in the background)

CERR

Calculation block detection alarm

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