Marathon Computer AACC 2000 manual Basic operation, Alarms

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Marathon Monitors Inc.

Basic operation

Switch on the power to the controller. It runs through a self-test sequence for about three seconds and then shows the process value, in the upper readout and the setpoint, in the lower readout. This is called the Home display.

26.0

20.0

Process Value (PV)

Setpoint

Figure 2-4 Home display

You can adjust the setpoint by pressing the or buttons. Two seconds after releasing either button, the display blinks to show that the controller has accepted the new value.

OP1 will light whenever output 1 is ON. This is normally the heating output when used as a temperature controller.

OP2 will light whenever output 2 is ON. This is normally the cooling output when used as a temperature controller.

Note: You can get back to this display at any time by pressing and together. Alternatively, you will always be returned to this display if no button is pressed for 45 seconds, or whenever the power is turned on.

Alarms

If the controller detects an alarm condition, it flashes an alarm message in the Home display. For a list of all the alarm messages, their meaning and what to do about them, see Alarms at the end of this chapter.

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Contents Copyright Marathon Monitors INC Marathon Monitors Inc Mechanical Installation Cleaning SafetyElectrostatic discharge precautions Electromagnetic compatibilityPower Isolation Safety SymbolsWiring PersonnelVoltage rating Over-temperature protectionOvercurrent protection Conductive pollutionRouting of wires Installation requirements for EMCGrounding of the temperature sensor shield Environmental ratings Equipment ratingsElectrical safety GeneralMarathon Monitors Inc Installation Outline dimensions Model Outline dimensions Model 2000 controllerController labels To install the controllerIntroduction Unplugging and plugging-in the controllerRear terminal layouts Model Aacc 2000 rear terminal layoutMarathon Monitors Inc Sensor input connections Module 1, 2Two terminal modules SnubbersDual output modules Four terminal modulesCOM Connections for Process Value 3 in module position Connections for Process Value 2 PV2Communication module Wiring of 2-wire EIA-485 serial communications link EIA-485 wiringMarathon Monitors Inc Operation 26.0 Front Panel LAYOUTsOP2 Button or Name ExplanationOP1 SP2Alarms Basic operationOperating modes Home display Automatic modeOutput power demand Display unitsManual Mode SetpointParameters and HOW to Access Them List header displaysMarathon Monitors Inc To change the value of a parameter Parameter namesParameter displays OFF List1OFF PID PID.1Fact STDPass Hydrogen or CO constant Name Description Prob Probe list Process FactorMillivolt input Offset Name Description DrA.t TunEDrA AdcRES Pid PID listSEt HcbSetpoint list Input listInFo Information list Output listCmS Comms list Access List FF.OPAlarms Diagnostic alarms Display What it means What to do about it Shows2b Diagnostic alarms Access Levels Access to Read-only Configuration Access list headerPassword entry Level selection Configuration passwordConfiguration level Returning to Operator Level Setting operator access to a parameterEdit level Hiding or revealing a complete listPromoting a parameter This sheet intentionally left blank Tuning Parameter Code Meaning or FunctionOne-shot Tuning How to tuneAdaptive tune Typical automatic tuning cycleCalculation of the cutback values Manual Tuning Setting the cutback values Proceed as followsIntegral action and manual reset Automatic droop compensation AdcName Description Values Mtr Motor list Min Max Default Motorized valve controlAdjusting the minimum on-time ‘mp.t’ Inertia and backlash settingsMarathon Monitors Inc Set the transfer point Enable in configuration levelGain scheduling Configuration Selecting configuration level Press to enter configurationLeaving Configuration Level Changing the passwordsD1SA Enab REULIN SB.OPNone RelyCMS DIG YESPMV H2O InSt Instrument configurationName Description Values Meaning SP.FFCJC Process value configInput configuration VAL.H Setpoint configurationVAL.L Alarm Modes Alarm configuration ValuesTable a Alarm types Value IMP Digital input 1 configuration Action on contact closureDigital input 2 configuration Action on contact closure Pflt Alarm relay configurationVflt Comms 1 module config Combining several digital events on to one outputCool Module config1A b C1 Module 1 configuration 2A/b/C Module 2 configuration For ‘id’ = ‘LoG.i’ i.e logic input use the LA Conf’ list onDisplayed value low 3A/b/C Module 3 configuration SELC Module configuration Module configurationVAL.8 Point Custom LinearisationVAL.1 CAL DC Output Calibration Password configurationExit Exit configuration User calibrationUser calibration User Calibration Enable User Calibration EnableCalibration Configuration List Exit configurationCalibration type Offset calibrationInput list header See table on the right for additional parameters Set OffsetTwo-point calibration Displayed ValueAdjust low-point calibration Select Low-point CalibrationAdjust High-point Calibration Select High-point CalibrationCalibration points and Calibration offsets Name Parameter description MeaningParameter Table Default HY1 Ssel FLT3 Marathon Monitors Inc AL1 Module 2A High Value VAL.1 101 Index Two-point calibration User calibration Aacc 2000 Carbon