Yokogawa DCS system parameters and alarm instructions
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 |


