
IM 01R04B08-00E-E 1st edition February 15, 2012 -00
All Rights Reserved. Copyright © 2012, Rota Yokogawa
<8. TECHNICAL DETAILS OF MODBUS COMMUNICATION>
8-3
The following table shows possible countermeasures :
Alarm(A);
Warning
(W)
Error (E)
Name Meaning Description Countermeasure
A-01 MF 1 criteria MassowLAlarm Mass ow below MF 1 criteria Increase mass ow / Change setting
A-02 MF 2 criteria MassowHAlarm MassowaboveMF2criteria Reduce mass ow / Change setting
A-03 VF1criteria VolumeowLAlarm VolumeowbelowVF1criteria Increasevolumeow/Changesetting
A-04 VF2criteria VolumeowHAlarm VolumeowaboveVF2criteria Reducevolumeow/Changesetting
A-05 Dens. 1 criteria DensityLAlarm Density below Dens. 1 criteria Increase density / Change setting
A-06 Dens. 2 criteria DensityHAlarm DensityaboveDens.2criteria Reduce density / Change setting
A-07 Temp. 1 criteria TemperatureLAlarm Temperature below Temp. 1 criteria Increase temperature / Change setting
A-08 Temp. 2 criteria TemperatureHAlarm TemperatureaboveTemp.2criteria Reduce temperature / Change setting
A-09 Conc. 1 criteria ConcentrationLAlarm Concentration below Conc. 1 criteria Increase concentration / Change setting
A-10 Conc. 2 criteria ConcentrationHAlarm ConcentrationaboveConc.2criteria Reduce concentration / Change setting
A-11 Netow1crit. NetowLAlarm NetowbelowNetow1crit. Increase net ow / Change setting
A-12 Netow2crit. NetowHAlarm NetowaboveNetow2crit. Reduce net ow / Change setting
A-13 Total thr exceed Total threshold exceed
Totalizervalueexceedstotal
threshold
Resettotalizer/Changesetting
A-14 Slug detection Slug ow detected Slug criterion is reached Reduce gas bubbles in medium
A-15
Empty pipe
det.
Empty pipe detectd Empty pipe criterion is reached Fill pipe
A-16 Corrosion det. Corrosion detected Corrosion criterion is reached Change detector
W-01 Density low Density lower 0.3 kg/l Density lower than 0.3 kg/l Fill the detector with uid
W-02 Fixed dens act. Fixed Dens selected ParameterDensxvalselisenabled
SetparameterDensxvalselto
inhibit
W-03 Fixed temp act. Fixed Temp selected ParameterTempxvalselisenabled
SetparameterTempxvalselto
inhibit
W-04 FixedMFactive Fixed MF selected ParameterMFxvalselisenabled SetparameterMFxvalseltoinhibit
W-05 Autozerorunning Autozeroisrunning…
Autozeroprocessisperformed,
started by user action or status input
Wait until process stops
(30sec or 180sec max)
W-06 AZvalerror
Autozerovalueoutof
range
Autozerovalueisoutoftheinternal
detector depending range
Stopowduringautozero.
Check detector installation
W-07 AZucterror
Autozerouctuationout
of range
Autozerouctuationisoutofthe
internal detector depending range
Stopowduringautozero.Check
electricalinstallation,vibrationsand
density.
W-08 Sensor simul. Sensorsimulationactive
Fixed frequency or xed phase dif-
ference is enabled
Set Sensor simulation to inhibit
W-09 Fixed Prim Out Analogoutput1xed
Analogoutput1xedat4mAfor
multidrop operation
SetHARTpollingaddressto0
(Multidrop operation stops)
W-10 Prim Out sat. Analogoutput1saturated
Analogoutput1reacheslessthan
3.8mAormorethan20.5mA
Increaseordecreasecurrentlevelof
output 1
W-11 Sec Out sat. Analogoutput2saturated
Analogoutput2reacheslessthan
3.8mAormorethan20.5mA
Increaseordecreasecurrentlevelof
output 2
W-12 Tert Out sat.
Pulse/Status output 1
saturated
Relation between pulse width and
pulse rate of Pulse/Status output 1
is too high
Decrease length of pulse width or
increase amount of pulse rate of pulse
output 1
W-13 Quart Out sat.
Pulse/Status output 2
saturated
Relation between pulse width and
pulse rate of Pulse/Status output 2
is too high
Decrease length of pulse width or
increase amount of pulse rate of pulse
output 2
E-01 Frequency fault Frequency fault detected Drivingfrequencyoutofrange Check cable (Remote) and detector
E-02 Signal fault Signal fault detected Phase difference out of range Check cable (Remote) and detector
E-03 EEPROM fault EEPROM fault detected CRC-Error ContactYokogawaservice
E-04 CPU fault CPU fault detected Micro processor is not working ContactYokogawaservice
E-05 DSP fault DSP fault detected Micro processor is not working ContactYokogawaservice
E-06 Sensor 1 fault
Sensor 1 Signal fault
detected
Sensor1signalbelow7%for3min Check cable (Remote) and detector
E-07 Sensor 2 fault
Sensor 2 Signal fault
detected
Sensor2signalbelow7%for3min Check cable (Remote) and detector
E-08 Temp sens fault
Temperature Sensor Fault
detected
T<-220°C or T>550°C
Check cable (Remote) and detector
Check temperature
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