Mobrey

Control unit Status MessagesFurther operational alarm/error messages are shown on the LCD when any display parameter isselected. When either Readings or Diagnostic parameters (D200 - D265) are shown, the SMARTCommunicator is interrogating the MSM400 control unit every 0.5 seconds, and the information returnedincludes various message signals concerning the current status of the returned echo. These messages aredisplayed on the LCD line 2 for two seconds when the condition is first detected, instead of the Displayparameter value. After this display period the condition message is abbreviated to a two letter codeshown on the right hand side of the LCD, as long as the condition persists These status messages areupdated every 10 seconds. Only one status message is displayed at a time, in a priority order, as listedbelow, to see all the alarms present use P520 - P525.CURRENT SATURATED (CS)The echo currently monitored is from a process value outside the pre-programmed 4-20mA range, sothe current is either at 4mA or 20mA and is possibly not valid.TEMPERATURE LIMIT (TL)This indicates that the process temperature or a combination of the process and ambient temperatureshave resulted in the electronics becoming too hot or too cold. Using the HHC, check P523 to see themaximum and minimum temperatures recorded. If the MSM400 electronics has recorded a temperatureabove 55°C then the electronics may have been permanently damaged. The MSM400 should bereturned to Mobrey Measurement or your local agent for repair or replacement.There are also various microprocessor fault messages which should be shown on the LCD, indicatingsignificant problems with the sensor microprocessor. For all these error conditions reference should bemade to the factory, and it will probably be necessary to return the unit for repair. The messages andcodes are:ROM CHECKSUMEEPROM SIGNATUREEEPROM CHECKSUMRAM TESTRCESECRTWhen an Unknown instrument is being interrogated, a universal set of error messages is used:DEVICE MALFUNCTIONPV OUT OF LIMITSNON PV OUT OF LIMITSCURRENT SATURATEDDVPLNLCSD.10.2Invalid Data EntryWhen the Operator tries to enter a command or parameter value which is invalid, the message on thescreen will indicate this. Typical messages occur as follows:“INVALID INPUT”(Rejected by the Psion Organiser)“INVALID DATA”(Rejected by the MSM400 control unit)- Parameter value entered is outside the limits allowed for that parameter, or resetting of thisparameter is not allowed as per the data entered.“IN WRITE PROTECT MODE”- The Password is “Closed” or does not allow access to this parameter.“INVALID PARAMETER NUMBER”- Parameter number entered is not known by MSM400.54IP258