Basic operation, Alarms | Marathon Computer AACC 2000 instruction

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.

AACC 2000 Carbon	26	Nov. 1, 1997
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Marathon Computer AACC 2000 manual Basic operation, Alarms

Contents

Copyright Marathon Monitors INC Marathon Monitors Inc Mechanical Installation Cleaning SafetyElectrostatic discharge precautions Electromagnetic compatibility Power Isolation Safety SymbolsWiring Personnel Voltage rating Over-temperature protectionOvercurrent protection Conductive pollution Routing of wires Installation requirements for EMCGrounding of the temperature sensor shield Environmental ratings Equipment ratings Electrical safety General Marathon Monitors Inc Installation Outline dimensions Model Outline dimensions Model 2000 controller Controller labels To install the controllerIntroduction Unplugging and plugging-in the controller Rear terminal layouts Model Aacc 2000 rear terminal layout Marathon Monitors Inc Sensor input connections Module 1, 2 Two terminal modules Snubbers Dual output modules Four terminal modulesCOM Connections for Process Value 3 in module position Connections for Process Value 2 PV2 Communication module Wiring of 2-wire EIA-485 serial communications link EIA-485 wiring Marathon Monitors Inc Operation 26.0 Front Panel LAYOUTs OP2 Button or Name ExplanationOP1 SP2 Alarms Basic operation Operating modes Home display Automatic modeOutput power demand Display units Manual Mode Setpoint Parameters and HOW to Access Them List header displays Marathon Monitors Inc To change the value of a parameter Parameter namesParameter displays OFF List1OFF PID PID.1 Fact STD Pass Hydrogen or CO constant Name Description Prob Probe list Process FactorMillivolt input Offset Name Description DrA.t TunEDrA Adc RES Pid PID listSEt Hcb Setpoint list Input list InFo Information list Output listCmS Comms list Access List FF.OP Alarms Diagnostic alarms Display What it means What to do about it Shows 2b 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 list Promoting a parameter This sheet intentionally left blank Tuning Parameter Code Meaning or Function One-shot Tuning How to tune Adaptive tune Typical automatic tuning cycleCalculation of the cutback values Manual Tuning Setting the cutback values Proceed as follows Integral action and manual reset Automatic droop compensation Adc Name Description Values Mtr Motor list Min Max Default Motorized valve control Adjusting the minimum on-time ‘mp.t’ Inertia and backlash settings Marathon Monitors Inc Set the transfer point Enable in configuration levelGain scheduling Configuration Selecting configuration level Press to enter configuration Leaving Configuration Level Changing the passwords D1SA Enab REULIN SB.OP None RelyCMS DIG YES PMV H2O InSt Instrument configurationName Description Values Meaning SP.FF CJC 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 output Cool 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 on Displayed value low 3A/b/C Module 3 configuration SEL C Module configuration Module configuration VAL.8 Point Custom LinearisationVAL.1 CAL DC Output Calibration Password configurationExit Exit configuration User calibration User calibration User Calibration Enable User Calibration EnableCalibration Configuration List Exit configuration Calibration type Offset calibrationInput list header See table on the right for additional parameters Set Offset Two-point calibration Displayed Value Adjust low-point calibration Select Low-point Calibration Adjust High-point Calibration Select High-point Calibration Calibration points and Calibration offsets Name Parameter description Meaning Parameter 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