Despatch Protocol Controller Manuale Utente

P/N 116087REV. 9/97E-72PROTOCOL™DIGITAL OVEN CONTROLLERINSTRUCTION MANUALPrepared by:Despatch IndustriesP.O. Box 1320Minneapolis, MN 55420-1320Custome

4Status Indicator LEDsProtocol has seven indicator LEDs that provide the following relevant information to theuser.Table 3 Protocol Indicator LEDsLED

5Operating ModesProtocol has three primary modes of operation: the Manual mode, the Timer mode andthe Program mode.Manual ModeThe Manual mode is a sin

6Figure 3. CZO Function in Tune ModeCalibration Zero OffsetThe Calibration Zero Offset (CZO) of Protocol is factory preset and tested for thespecifie

7NOTE: The CZO function iseasily set for specific operatingconditions.NOTE: Reset times greater than 35seconds/repeat are not recommended.Table 4 C

8WARNING: Never operate theoven at a temperature in excessof the maximum operatingtemperature.Protocol Hi-LimitProtocol will not let the high limit v

9Figure 5. Protocol Control PanelINSTRUCTIONSStart-UpAn outline and examples for the Manual mode, Timer mode and Program mode arereferenced in the Ap

10NOTE: For safety reasons, Protocol will not letthe operator set the Hi-limit below the setpoint. It may be necessary to adjust the Protocolsetpoint

11StopThe following are stop instructions for the Manual mode.1. Press the Heater off key. The Heater Relay LED will shut off.2. Wait for oven temper

12NOTE: During processing thedisplay shows the setpoint on theleft and the actual oven tempera-ture on the right.NOTE: For safety reasons, Protocolwi

13NOTE: When the Timer mode isrunning, pressing the Start key willdisplay the time remaining in thecycle. The display will showTRHHMMSS which stands

NoticeUsers of this equipment must comply with operating procedures and training ofoperation personnel as required by the Occupational Safety and Heal

145. Press the Power on pushbutton to turn power off.An example of the Timer mode is referenced in the Appendix of this manual.

15NOTE: All profiles entered can becleared by using the PROF CLRfunction in the TUNE mode.NOTE: For safety reasons,Protocol will not let the operator

16WARNING: Never operate the ovenat a temperature in excess of themaximum operating temperature.2. Use the + or - keys to enter the ramp time.c. Progr

17NOTE: The SOAK-DEV limit isalso the assured soak limit. Thismeans that the soak times will notbegin until the processtemperature is within the SOA

18NOTE: When in the Programmode, pressing the Start key willdisplay the time remaining in thecycle (TRHHMMSS). Pressing theReset key will display th

19APPENDIXSpecial InstructionsThe Protocol has been preset and tested at the factory for normal operating conditions. In most applications, it will no

20Control InstrumentTune ModeVarious functions of the control instrument are set by parameters in the tune mode. Toaccess the tune mode, it is necess

21Table 6 Tuning OutlineDisplay DescriptionTUNECODEPID TUNEP-1I-1D-1DEG -SPL -CZO -DISBEEPPF-RECVRDIG COMMRECONFIGPROF CLRVARS CLRCODE *E*Selects tune

22Tuning WorksheetIn most applications it is not necessary to alter tuning parameters. To enter the tunemode, press the Tune key. Tune will be displ

23WARNING: Calibrationequipment without internalambient compensation provisionsrequires subtracting the ambientmV signal from the calibrationtemperat

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24All errors must be cleared to perform calibration. Any active error will inhibit the calibration function. To clear a Hi-Limit control error [HL

25NOTE: ### or ##.# represents a numeric value or parameter.Tune Mode Parameter CalibrationPress Display Factory DefaultSettingActualSettingPress Adju

2615. Apply a 250E F signal to the high limit thermocouple input: a. Connect the piece of type J thermocouple lead wire, wired to the HighLimit T/C te

2722. Press the following key sequence: -, -, +. The display now reads SCAL450.23. Adjust the simulator to supply a 450E F signal. Wait for 30 secon

28Calibration RecoveryThe Protocol control has a factory calibration recovery feature. This feature allows theoperator to restore the Protocol to an

29Diagnostics ModeThe diagnostics mode is provided to give certain relative information about Protocol. The following table gives an outline of the di

30Power FailureIn the event that the power supplied to Protocol is insufficient at any point during arunning mode, the display will read PWR-FAIL. In

31NOTE: Do not turn thepower off until the oventemperature is below100EC (212EF).NOTE: EF is selected in the tunemode.Programming Examples and Outlin

32NOTE: EC and HHMM(hours/minutes) is selected in thetune mode.Example 2 - Timer ModeControl the process at 200EC for three hours and 15minutes with

33Program ModeProgram Mode OutlineDisplay DescriptionPROGRAM Hi-Limit HL PROFILES PRO- SEG- RAMP

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34C The profile number is manually entered using the + or - keys.C Six segments exist for each profile.C If the ramp time and soak time for any one se

35Figure 7. Sample ProfileProgram WorksheetThe program worksheet serves as a guide to the input parameters for the programmode.Display Setting(s)HL

36Figure 8. Example Temperature ProfileNOTES: HHMM(hours/minutes) and EC selectedin the tune mode. No eventoutputs are being used. Soak-Deviation

37Figure 9. Example Temperature ProfileNOTES: MMSS(minutes/seconds) and EFselected in the tune mode. Event1 wired properly for autostart,events 2

38NOTES: HHMM(hours/minutes) and ECselected in the tune mode. No events used. Soak-Deviation = 10EC (alsoassured soak limit). Minimum operatingtempe

39TroubleshootingPROBLEM/SYMPTOMPROBABLECAUSESUGGESTED CORRECTIVE ACTIONErratictemperaturecontrolThe controller typically has a proportion band (PB) o

PROBLEM/SYMPTOMPROBABLECAUSESUGGESTED CORRECTIVE ACTION40Temperaturerunaway - heaterwill not turn "OFF"Shorted SSRRelayDefectivecontrollerDi

PROBLEM/SYMPTOMPROBABLECAUSESUGGESTED CORRECTIVE ACTION41Control or Hi-limitreadout displays500°C or 932°FLoss of calibration Perform calibration.

iTABLE OF CONTENTSINTRODUCTION ... 1THEORY OF OPERATION ...

iiAPPENDIX ... 19Special Instructions ... 19Control In

1INTRODUCTIONThe special features of the Protocol™ include:C PID TuningC Programmable up to 48 segmentsC Built-in manual reset hi-limit controlC Built

2Figure 2. Main Display and Keypad on Protocol ControlTHEORY OF OPERATIONThis section describes the Protocol installed in the LAC, LAD, LFD and LND S

3Keypad ControlsTable 1 Protocol Keypad ControlsMode Display Code Function DescriptionManual MANUAL Operation Single setpoint controlTimer TIMER Opera