Time/Temperature Control Series 733/734 - Watlow

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AlarmsChapter 5 Alarm & Error CodesUsing AlarmsThe Series 733/734 has two alarm types, Process or Deviation. A Process alarmsets an absolute temperature. When the process exceeds that absolute temperaturelimit an alarm occurs. The Process alarm set points may be independently sethigh and low.A Deviation alarm alerts the operator when the process strays too far from setpoint. The operator can enter independent high and low alarm settings. The setpoint is the reference for the deviation alarm. Any change in set point causes acorresponding shift in the deviation alarm. Example: If your set point is 100°F,and a deviation alarm set at +7°F as the high limit, and -5°F as the low limit, thehigh alarm trips at 107°F, and the low alarm at 95°F. If you change the set point to130°F, the alarms follow the set point and trip at 137°F and 125°F.ÑOTE:A dash "_" can beeither a 1 or 2 whichrepresents Zone 1or Zone 2 respectively.ÑOTE:An alarm displaywill be masked byan error conditionor when the controlis in the Setup,Service or Calibrationmenus.Both process and deviation alarms can be latching or non-latching. When thealarm condition is removed a non-latching alarm automatically clears the alarmoutput. You must manually clear a latching alarm. See below.Flashing "LO _" or "HI _" in the display indicates an alarm. The display alternatelyshows information from the current parameter and the "LO _" or "HI _" alarmmessage at one second intervals. If an alarm condition exists, the alarm output isde-energized. An alarm condition does not effect the control output.To clear an alarm…• First correct the alarm condition, then…• If the alarm is latching…Clear it manually as soon as the process temperature is inside the alarm band(below A_HI and above A_LO).Enter the Program mode by pressing the keys simultaneously for 3seconds.Press the Menu 12 12 key once. Next, press the Time key . The Ac (AlarmClear) prompt is displayed. Press the Temperature key and the alarm iscleared. Pressing the Time key twice, takes you back to the Operationmode [0)º0].• If the alarm is non-latching…The alarm clears itself automatically as soon as the process temperature is 3°Finside the fixed alarm limit.Alarm Silencing is available with either the process or deviation alarm in latchingand non-latching mode. On initial power up, alarm silencing disables the alarmmessage and the alarm output relay. Once the process value crosses into the"safe" region, the latching or non-latching alarm is enabled. Any future deviationoutside this safe band triggers an alarm message and the alarm output relay deenergizes.On dual zone controls, both process values must cross into the saferegion before either the latching or non-latching alarm is enabled.12 WATLOW Series 733/734 Program ManualAlarms & Error Codes, Chapter 5
To mask an alarm …• When the SIL parameter is ON…• Press the Temperature key . This masks or "snoozes" the alarm messagefor 30 seconds, and energizes the alarm output relay.Error Codes• When the SIL parameter is OFF…• Press the Temperature key . This masks or "snoozes" the alarm messagefor 30 seconds, but does not energize the alarm relay.Error Code MessagesThe error code is visible in the display and alternates with the current display at a3 second rate. The list below outlines the standard error codes associated withthe Series 733/734. They are designed to isolate specific problem areas and aidin troubleshooting your control. If the problem persists, consult the factory.ProblemEr01 -ROM (Read OnlyMemory) checksum errorEr02 -RAM (Random AccessMemory) checksum errorProbable CauseInternal ROM isdefective.Internal RAM is defective.Solution• Cycle power• Cycle powerçWARNING:Electrical noise or anoise event, excessenvironmentalmoisture or temperature,or vibrationmay causeSeries 733/734errors to occur. Ifthe cause of anerror is not otherwiseapparent,check for these.Er03 -Ambient sensor errorAmbient temperature isbelow 32°F/0°CFactory calibrationparameters have beenaltered.• Check ambient temperatureat the control.• Restore factorycalibration parameters.See Calibration section.Table 2 -Error CodeTroubleshootingEr04 -Configuration errorDefective microprocessor• Cycle powerEr05 -EEprom errorPower loss while storingdata.• Cycle powerEr06 -Zone 1 A/D (Analog toDigital Converter) UnderflowerrorEr07 -Zone 1 A/D overflow errorEr08 -Zone 2 A/D (Analog toDigital Converter) Underflowerror• Incorrect sensor type• Measuring temperatureoutside the sensorrange• Reversed sensor leadsOpen sensor• Incorrect sensor type• Measuring temperatureoutside the sensorrange• Check the InP1 parameter.Verify itmatches your sensor.• Check the InP1 parameter.Verify itmatches your sensor.• Check the InP2 parameter.Verify itmatches your sensor.ÑOTE:For Er06 throughEr09, always checkthe sensor andconnections for areversed or opensensor beforetrying the solutionlisted.Er09 -Zone 2 A/D overflow errorOpen sensor• Check the InP2 parameter.Verify itmatches your sensor.Alarms & Error Codes, Chapter 5 WATLOW Series 733/734 Program Manual 13
Page 1: Series 733/734TotalCustomerSatisfac
Page 4 and 5: WATL WKeys & DisplaysSERIES 733EVEN
Page 6 and 7: ProgramTo Advance To The Next Menu
Page 8 and 9: Program ChartTable 1 -Program ModeM
Page 10 and 11: OperationRunning a MenuPress the ap
Page 14 and 15: Error CodesProblem Probable Cause S
Page 16 and 17: Notes16 WATLOW Series 733/734 Progr
Page 18 and 19: SpecificationsControl Mode• Singl
Page 20: Watlow Series 733/734 User's Manual

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