Marathon Computer AACC 2000 User Manual

Marathon Monitors Inc.

AACC 2000 (Carbon) Monitor / Controller

Installation and Operation Handbook

MARATHON MONITORS INC

Marathon Monitors Inc.

Part # F200047

COPYRIGHT © 1998 MARATHON MONITORS INC. 3100 East Kemper Road, Cincinnati, Ohio 45241 1-800-322-4444 (513) 772-7788 FAX: (513) 772-7853 No part of this document may be stored or reproduced by any means whatsoever without prior written permission of Marathon Monitors Inc.

All trademarks used in this publication are duly marked and the sole property of their respective owners. No attempt at trademark or copyright infringement is intended or implied.

Marathon Monitors makes no warranties express or implied beyond the written warranty presented at initial purchase. Marathon Monitors Inc. is not responsible for any product, process, damage or injury incurred while using this equipment. Marathon Monitors makes no representations or warranties with respect to the contents hereof and specifically disclaims any warranties of merchantability or fitness for any particular application or purpose.

“This product is covered by one or more of the following US Patents:

5,484,206; Additional patents pending.

REVISION 1.1.1 - 1998-02-26 ADD TYPICAL WIRING DIAGRAM. REVISION 1.1.2 - 1998-04-30 ADD HEADER AND FOOTER TO PAGE 36.

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Table of contents:

SAFETY and EMC INFORMATION................................................................... 4

Installation Safety Requirements ........................................................................... 5

Installation requirements for EMC.................................................................... 7

Technical Specification......................................................................................... 8

Installation ..........................................................................................................11

Introduction.....................................................................................................13

MECHANICAL INSTALLATION ..................................................................13

Wiring of 2-wire EIA-485 serial communications link.....................................21

OPERATION ......................................................................................................23

FRONT PANEL LAYOUTs.............................................................................24

Basic operation ................................................................................................26

Operating modes ..............................................................................................27

Automatic mode...............................................................................................28

MANUAL MODE ...........................................................................................29

PARAMETERS AND HOW TO ACCESS THEM ...........................................30

Parameter names..............................................................................................32

Navigation Diagram.........................................................................................33

PARAMETER TABLES..................................................................................37

Alarms.............................................................................................................44

Diagnostic alarms............................................................................................45

ACCESS LEVELS ..............................................................................................47

Edit level .........................................................................................................50

Setting operator access to a parameter ..............................................................50

TUNING .............................................................................................................53

AUTOMATIC TUNING..................................................................................54

MANUAL TUNING........................................................................................56

Setting the cutback values................................................................................57

motorized valve control....................................................................................59

Gain scheduling...............................................................................................62

CONFIGURATION.............................................................................................63

Selecting configuration level............................................................................64

Changing the passwords ..................................................................................65

User calibration ...................................................................................................85

User Calibration Enable...................................................................................86

Offset calibration .............................................................................................87

Two-point calibration.......................................................................................89

Calibration points and Calibration offsets.........................................................92

Parameter Table (Default)....................................................................................93

INDEX.............................................................................................................. 102

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SAFETY and EMC INFORMATION

Please read this section carefully before installing the controller

This controller is intended for industrial temperature and process control applications where it will meet the requirements of the European Directives on Safety and EMC. Use in other applications, or failure to observe the installation instructions of this handbook may impair the safety or EMC protection provided by the controller. It is the responsibility of the installer to ensure the safety and EMC of any particular installation.

Safety

This controller complies with the European Low Voltage Directive 73/23/EEC, amended by 93/68/EEC, by the application of the safety standard EN 61010.

Electromagnetic compatibility

This controller conforms with the essential protection requirements of the EMC Directive 89/336/EEC, amended by 93/68/EEC, by the application of a Technical Construction File. This instrument satisfies the general requirements of an industrial environment as described by EN 50081-2 and EN 50082-2. For more information on product compliance refer to the Technical Construction File.

SERVICE AND REPAIR

This controller has no user serviceable parts. Contact your nearest MMI Service center (800-322-4444) for repair.

Caution: Charged capacitors

Before removing an instrument from its case, disconnect the supply and wait at least two minutes to allow capacitors to discharge. Failure to observe this precaution will expose capacitors that may be charged with hazardous voltages. In any case, avoid touching the exposed electronics of an instrument when withdrawing it from the case.

Electrostatic discharge precautions

When the controller is removed from its case, some of the exposed electronic components are vulnerable to damage by electrostatic discharge from someone handling the controller. To avoid this, before handling the unplugged controller discharge yourself to ground.

Cleaning

Do not use water or water based products to clean labels or they will become illegible. Isopropyl alcohol may be used to clean labels. A mild soap solution may be used to clean other exterior surfaces of the product.

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Installation Safety Requirements

Safety Symbols

Various symbols are used on the instrument, they have the following meaning:

Caution, (refer to the

accompanying documents)

The functional earth connection is not required for safety purposes but to ground RFI filters.

Personnel

Installation must only be carried out by qualified personnel.

Enclosure of live parts

To prevent hands or metal tools touching parts that may be electrically live, the controller must be installed in an enclosure.

Caution: Live sensors

The fixed digital inputs, non-isolated dc, logic and outputs and the logic output of dual output modules, are all electrically connected to the main process variable input. If the temperature sensor is connected directly to an electrical heating element then these nonisolated inputs and outputs will also be live. The controller is designed to operate under these conditions. However you must ensure that this will not damage other equipment connected to these inputs and outputs and that service personnel do not touch connections to these i/o while they are live. With a live sensor, all cables, connectors and switches for connecting the sensor and non-isolated inputs and outputs must be mains rated.

Functional earth (ground) terminal

Wiring

It is important to connect the controller in accordance with the wiring data given in this handbook. Take particular care not to connect AC supplies to the low voltage sensor input or other low level inputs and outputs. Only use copper conductors for connections (except thermocouple inputs) and ensure that the wiring of installations comply with all local wiring regulations. For example in the in the UK use the latest version of the IEE wiring regulations, (BS7671). In the USA use NEC Class 1 wiring methods.

Power Isolation

The installation must include a power isolating switch or circuit breaker. This device should be in close proximity to the controller, within easy reach of the operator and marked as the disconnecting device for the instrument.

Earth leakage current

Due to RFI Filtering there is an earth leakage current of less than 0.5mA. This may affect the design of an installation of multiple controllers protected by Residual Current Device, (RCD) or Ground Fault Detector, (GFD) type circuit breakers.

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Overcurrent protection

To protect the internal PCB tracking within the controller against excess currents, the AC power supply to the controller and power outputs must be wired through the fuse or circuit breaker specified in the technical specification.

Voltage rating

The maximum continuous voltage applied between any of the following terminals must not exceed 264Vac:

• line or neutral to any other connection;

• relay or triac output to logic, dc or sensor connections;

• any connection to ground.

The controller should not be wired to a three phase supply with an unearthed star

connection. Under fault conditions such a supply could rise above 264Vac with respect to ground and the product would not be safe.

Voltage transients across the power supply connections, and between the power supply and

ground, must not exceed 2.5kV. Where occasional voltage transients over 2.5kV are expected or measured, the power installation to both the instrument supply and load circuits should include a transient limiting device.

These units will typically include gas discharge tubes and metal oxide varistors that limit

and control voltage transients on the supply line due to lightning strikes or inductive load switching. Devices are available in a range of energy ratings and should be selected to suit conditions at the installation.

Conductive pollution Electrically conductive pollution must be excluded from the cabinet in which the controller

is mounted. For example, carbon dust is a form of electrically conductive pollution. To secure a suitable atmosphere in conditions of conductive pollution, fit an air filter to the air intake of the cabinet. Where condensation is likely, for example at low temperatures, include a thermostatically controlled heater in the cabinet.

Over-temperature protection When designing any control system it is essential to consider what will happen if any part of

the system should fail. In temperature control applications the primary danger is that the heating will remain constantly on. Apart from spoiling the product, this could damage any process machinery being controlled, or even cause a fire.

Reasons why the heating might remain constantly on include:

• the temperature sensor becoming detached from the process;

• thermocouple wiring becoming a short circuit;

• the controller failing with its heating output constantly on;

• an external valve or contactor sticking in the heating condition;

• the controller setpoint set too high.

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Where damage or injury is possible, we recommend fitting a separate over-temperature

protection unit, with an independent temperature sensor, which will isolate the heating circuit.

Please note that the alarm relays within the controller will not give protection under all

failure conditions.

Grounding of the temperature sensor shield In some installations it is common practice to replace the temperature sensor while the

controller is still powered up. Under these conditions, as additional protection against electric shock, we recommend that the shield of the temperature sensor is grounded. Do not rely on grounding through the framework of the machine.

Installation requirements for EMC To ensure compliance with the European EMC directive certain installation precautions are

necessary as follows:

• For general guidance refer to MMI Controls EMC Installation Guide, HA025464.

• When using relay or triac outputs it may be necessary to fit a filter suitable for

suppressing the emissions. The filter requirements will depend on the type of load. For typical applications we recommend Schaffner FN321 or FN612.

• If the unit is used in table top equipment which is plugged into a standard power socket,

then it is likely that compliance to the commercial and light industrial emissions standard is required. In this case to meet the conducted emissions requirement, a suitable mains filter should be installed. We recommend Schaffner types FN321 and FN612.

Routing of wires

To minimise the pick-up of electrical noise, the wiring for low voltage dc and particularly the sensor input should be routed away from high-current power cables. Where it is impractical to do this, use shielded cables with the shield grounded at both ends.

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Technical Specification

Environmental ratings

Panel sealing: Instruments are intended to be panel mounted. The

rating of panel sealing is IP65, (EN 60529), or 4X, (NEMA

250). Operating temperature: 0 to 55oC. Ensure the enclosure provides adequate ventilation. Relative humidity: 5 to 95%, non condensing. Atmosphere: The instrument is not suitable for use above 2000m

or in explosive or corrosive atmospheres.

Equipment ratings

Supply voltage: 100 to 240Vac -15%, +10%, or optionally: Supply frequency: 48 to 62Hz. Power consumption: 15 Watts maximum. Relay 2-pin (isolated): Maximum: 264Vac, 2A resistive. Minimum: 12Vdc, 100mA. Relay changeover (isolated): Maximum: 264Vac, 2A resistive. Minimum: 6Vdc, 1mA. Triac outputs (isolated): 30 to 264Vac. Maximum current: 1A resistive. Leakage current: The leakage current through triac and relay contact

suppression components is less than 2mA at 264Vac, 50Hz.

Over current protection: External over current protection devices are required that

match the wiring of the installation. A minimum of 0.5mm2 or 16awg wire is recommended. Use independent fuses for the instrument supply and each relay or triac output. Suitable fuses are T type, (EN 60127 time-lag type) as follows; Instrument supply: 85 to 264Vac, 2A, (T). Relay outputs: 2A (T). Triac outputs: 1A (T).

Low level i/o: All input and output connections other than triac and relay are

intended for low level signals less than 42V.

Single logic output: 18V at 24mA. (Non-isolated.) DC output (Isolated): 0 to 20mA (600Ω max), 0 to 10V (500Ω min). DC output (Non isolated): 0 to 20mA (600Ω max), 0 to 10V (500Ω min). Fixed digital inputs: Contact closure. (Non isolated.) Triple contact input: Contact closure. (Isolated.) Triple logic input: 11 to 30Vdc. (Isolated.) DC or 2nd PV input: As main input plus 0-1.6Vdc, Impedance, >100MΩ.

(Isolated.)

Potentiometer input: 0.5V excitation, 100Ω to 1.5kΩ Potentiometer. (Isolated.) Transmitter supply: 24Vdc at 20mA. (isolated.) Strain gauge supply: 10Vdc. Minimum bridge resistance 300Ω. (Isolated.) Digital Communications: EIA-232, 2-wire EIA-485 or 4-wire EIA-485 (All isolated).

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General

Main PV Input range: +100mV, 0 to 10Vdc (auto ranging) and 3 wire Pt100. Calibration accuracy: The greater of +0.2% of reading, +1 LSD or +1oC. Cold junction compensation >30:1 rejection of ambient temperature, (for thermocouple

i/p).

Electrical safety

Standards: EN 61010, Installation category II, pollution degree

CSA C22.2 No.142-M1987.

Installation category II: Voltage transients on any mains power connected to the

instrument must not exceed 2.5kV.

Pollution degree 2: Conductive pollution must be excluded from the

cabinet in which the instrument is mounted.

Isolation: All isolated inputs and outputs have reinforced

insulation to provide protection against electric shock. The fixed digital inputs, non-isolated dc, logic, and the logic output of dual output modules, are all electrically connected to the main process variable input, (thermocouple etc.).

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AACC 2000 Carbon Nov. 1, 1997

Installation

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Display screen

Latching ears

Ratchets

AACC 2000 1/4 DIN controller

Case

Figure 1 - 3

Terminal

Label

Panel retaining clips

Panel sealing gasket

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Outline dimensions Model 2000

96mm

3.78in

96mm

3.78in

Panel cut-out

92 x 92 mm

3.62 x 3.62 in

Figure 1-4 Outline dimensions Model 2000 controller

-0

+0.8

-0

+0.03

Recommended minimum spacing of controllers

150mm

5.91in

The electronic assembly of the controller plugs into a rigid plastic case, which in turn fits into the standard DIN size panel cut-out shown in Figures 1-3 and 1-4.

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Introduction

Model AACC 2000’s are high stability, process controllers with self and adaptive tuning. They have a modular hardware construction which accepts up to three plug-in Input/Output modules and two interface modules to satisfy a wide range of control requirements. Two digital inputs and an optional alarm relay are included as part of the standard hardware.

Before proceeding, please read the, Safety and EMC Information.

Controller labels

The labels on the sides of the controller identify the ordering code, the serial number, and the wiring connections.

Appendix A, Understanding the Ordering Code, explains the hardware and software configuration of your particular controller.

MECHANICAL INSTALLATION

To install the controller

1. Prepare the control panel cut-out to the size shown in Figure 1-3, or 1-4.

2. Insert the controller through the panel cut-out.

3. Spring the upper and lower panel retaining clips into place. Secure the controller in

position by holding it level and pushing both retaining clips forward.

Note: If the panel retaining clips subsequently need removing, in order to extract the controller from the control panel, they can be unhooked from the side with either your fingers, or a screwdriver.

Unplugging and plugging-in the controller

If required, the controller can be unplugged from its case by easing the latching ears outwards and pulling it forward out of the case. When plugging the controller back into its case, ensure that the latching ears click into place in order to secure the IP65 sealing.

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All electrical connections are made to the screw terminals at the rear of the controller. If you wish to use crimp connectors, the correct size is AMP part number 349262-1. They accept wire sizes from 0.5 to 1.5 mm2 (16 to 22 AWG). A set of connectors is supplied with the controller. The terminals are protected by a clear plastic hinged cover to prevent hands, or metal, making accidental contact with live wires.

Rear terminal layouts

The rear terminal layouts are shown in Figure 1-6. The right-hand column carries the connections to the power supply, digital inputs 1 and 2, alarm relay and sensor input. The second and third columns from the right carry the connections to the plug-in modules. The connections depend upon the type of module installed, if any. To determine which plug-in modules are fitted, refer to the ordering code and wiring data on the controller side labels.

Model AACC 2000 rear terminal layout

Figure 1-6 Rear terminal layout

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The display below shows a typical wiring diagram for the AACC2000 Carbon Controller:

Typically a series of letters appear after the part number, see chart below.

D – Dual Relay

A – Analog Output

X – Not Installed

C – Communications

I – Analog Input (typically in position 3)

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P V

Sensor input connections

The connections for the various types of sensor input are shown below.

Thermocouple

V+

PLUG-IN MODULE CONNECTIONS

Module 1, 2 and 3

Module positions 1, 2 and 3 are plug-in modules. They can be either two terminal modules of the types shown in Table 1-1, or four terminal modules of the types shown in Table 1-2.

The tables show the connections to each module and the functions that they can perform.

Resistance thermometer

V+

Fig 1-7 Sensor input connections

mA input Volts or mV inputs

V+

2.49Ω current sense resistor

V+

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Two terminal modules

Note: Module 1 is connected to terminals 1A and 1B

Module 2 is connected to terminals 2A and 2B Module 3 is connected to terminals 3A and 3B.

Terminal identity Module type A B C D Possible functions Relay: 2-pin

(2A, 264 Vac max.)

Logic - non-isolated

(18Vdc at 20mA)

Triac

(1A, 30 to 264Vac)

DC output:

- non-isolated

(10Vdc, 20mA max.)

−−

Line Load

++ −

Table 1-1 Two terminal module connections

Unused Heating, cooling, alarm,

program event, valve raise,

or valve lower

Unused Heating, cooling, mode 1,

mode 2, program event

Unused Heating, cooling, program

event, valve raise, or valve

lower

Unused Heating, or cooling, or

retransmission of PV,

setpoint, or control output

Snubbers

The relay and triac modules have an internal 15nF/100Ω ‘snubber’ connected across their output, which is used to prolong contact life and to suppress interference when switching inductive loads, such as mechanical contactors and solenoid valves.

WARNING

When the relay contact is open, or the triac is off, the snubber circuit passes 0.6mA at 110Vac and 1.2mA at 240Vac. You must ensure that this current, passing through the snubber, will not hold on low power electrical loads. It is your responsibility as the installer to ensure that this does not happen. If the snubber circuit is not required, it can be removed from the relay module (BUT NOT THE TRIAC) by breaking the PCB track that runs crosswise, adjacent to the edge connectors of the module. This can be done by inserting the blade of a small screwdriver into one of the two slots that bound it, and twisting.

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Four terminal modules

Note: Module 1 is connected to terminals 1A, 1B, 1C and 1D

Module 2 is connected to terminals 2A, 2B, 2C and 2D Module 3 is connected to terminals 3A, 3B, 3C and 3D

Module type Terminal identity Possible functions

A B C D

lay: changeover

(2A, 264 Vac max.)

Heating, cooling,or

alarm,

DC control: Isolated

(10V, 20mA max.)

24Vdc transmitter supply

Potentiometer input

100Ω to 15KΩ

DC retransmission

DC remote input or

Process Value 2

(Module 3 only)

Dual output modules

Dual relay

(2A, 264 Vac max.)

Dual Triac

(1A, 30 to 264Vac)

Dual logic + relay

(Logic is non-isolated)

Dual Logic + triac

(Logic is non-isolated)

Triple logic input and output modules - see ratings on the next page

Triple contact input Input 1 Input 2 Input 3 Common

++ −−

+ −

+0.5Vdc

+ −

0-10Vdc RT source

(Refer to Fig. 1-8)

Line

+ −

Load

±100mV

0-20mA

Line

COM

Load

Heating, or cooling

To power process

inputs

Motorised Valve

Position feedback

Retrans. of setpoint,

or process value Remote Setpoint

Second PV

Heating + cooling

Dual alarms

Valve raise & lower

Heating + cooling

Valve raise & lower

Heating + cooling

Triple logic input Input 1 Input 2 Input 3 Common

Table 1-2 Four terminal module connections.

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Connections for Process Value 3 in module position 3

Thermocouple

−

Resistance thermometer

Figure 1-8 Connections for Process Value 2 (PV2)

mA input

Current

sense

resistor

2.49Ω

−

Volts or mV inputs

0-1.6Vdc

High Impedance

or mVdc

−

The diagrams above show the connections for the various types of input. The input will have been configured in accordance with the ordering code.

10V inputs

0-10Vdc

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Communication module 1

The Models AACC 2000 will accept a plug-in communications modules. The possible module types are shown in the table below. The serial communications can be configured for either Modbus, or MMI protocol.

Communications module 1 Terminal identity (COMMS 1) Module type HA HB HC HD HE HF 2-wire EIA-485 serial

communications EIA-232 serial communications

Table 1-3 Communication module 1 connections

− − −

Common A (-) B (+)

Common Rx Tx

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Com

Note:

All resistors are 220 ohm 1/4W carbon composition.

Local grounds are at equipotential. Where equipotential is not available wire into

separate zones using a galvanic isolator.

Use a repeater (KD845) for more than 32 units.

ABPC

MMI Universial

RXTXCom

ComTXRX

Up to 32 S2000 controllers or

Interface Units may

be included on the network

232

ComBA

ComAB

Com

ABLocal Earth

Area 1

ComABEFDLocal

Earth

HE-

HF+HDSeries 2000

Controller

HE-

HF+HDSeries 2000

Controller

For reasons of safety

not

connect to

local earth here.

Local

Earth

Local

Earth

Local

Earth

Local

Earth

Local

Earth

HE -

HF+

Series 2000

Controller

Galvanic

Isolation

Barrier

Wiring of 2-wire EIA-485 serial communications link

2-wire EIA-485 is a connection which allows up to 32 controllers to be multi-dropped from a single communications link over a distance of up to 1.2Km. To ensure reliable operation of the communications link, (without data corruption due to noise or line reflections) the connections between the controller should be made using a twisted pair of wires inside a screened cable with the connections terminated with resistors in the manner shown in this diagram.

Converter

Local Ground Zone 1

Local Ground Zone 2

Figure 1-9 EIA-485 wiring

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OPERATION

This chapter has nine topics:

• FRONT PANEL LAYOUTS

• BASIC OPERATION

• OPERATING MODES

• AUTOMATIC MODE

• MANUAL MODE

• PARAMETERS AND HOW TO ACCESS THEM

• NAVIGATION DIAGRAM

• PARAMETER TABLES

• ALARMS

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FRONT PANEL LAYOUTs

Figure 2-1 Model AACC 2000 front panel layout

26.0

20.0

Button Button Button Button

Page Scroll Down Up

AACC 2000 Carbon Nov. 1, 1997

Button or

indicator

OP1

OP2

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Name Explanation

Output 1

Output 2

When lit, it indicates that the output installed in

module position 1 is on. This is normally the heating output on a temperature controller.

When lit, it indicates that the output installed in

module position 2 is on. This is normally the cooling output on a temperature controller.

SP2 Setpoint 2

REM Remote setpoint

Run/Hold button

When lit, this indicates that setpoint 2, (or a

setpoint 3-16) has been selected.

When lit, this indicates that a remote setpoint

input has been selected.

‘REM’ will also flash when communications is

active.

When pressed, this toggles between automatic

and manual mode:

• If the controller is in automatic mode the

Auto/Manual

button

AUTO light will be lit.

• If the controller is in manual mode, the MAN

light will be lit.

The Auto/Manual button can be disabled in

configuration level.

• Press once to start an automatic Probe care

cycle

• This RUN light indicates when ever a probe

care function is in progress

Page button Press to select a new list of parameters.

Scroll button Press to select a new parameter in a list.

Down button Press to decrease a value in the lower readout.

Up button Press to increase a value in lower readout.

Figure 2-3 Controller buttons and indicators

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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

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.

Process Value (PV) Setpoint

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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Operating modes The controller has two basic modes of operation:

• Automatic mode in which the output is automatically adjusted to maintain the

temperature or process value at the setpoint.

• Manual mode in which you can adjust the output independent of the setpoint.

You toggle between the modes by pressing the AUTO/MAN button. The displays which

appear in each of these modes are explained in this chapter.

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Automatic mode You will normally work with the controller in automatic mode. If the MAN light is on,

press the AUTO/MAN button to select automatic mode. The AUTO light comes on

Power on

x 2

The Home display Check that the AUTO light is on. The upper readout shows the measured

temperature.

The lower readout shows the setpoint. To adjust the setpoint up or down, press

or .

(Note: If Setpoint Rate Limit has been enabled, then the lower readout will show the active setpoint. If or is pressed, it will change to show and allow adjustment of, the target setpoint.)

Press once Display units

A single press of will flash the

display units for 0.5 seconds, after which you will be returned to the Home display. Flashing of the display units may have been disabled in configuration in which case a single press will take you straight to the display shown below.

Press twice % Output power demand

The % output power demand is displayed

in the lower readout. This is a read-only value. You cannot adjust it.

Press and together to return to the Home display.

Pressing from the Output Power display may access further parameters. These may

be in this scroll list if the ‘Promote’ feature has been used (see Chapter 3, Access Level). When you reach the end of this scroll list, pressing will return you to the Home

display.

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MANUAL MODE If the AUTO light is on, press the AUTO/MAN button to select manual mode.

The MAN light comes on.

Power on

x 2

Pressing from the Output Power display may access further parameters. These may

be in this scroll list if the ‘Promote’ feature has been used (see Chapter 3, Edit Level). When you reach the end of this scroll list, pressing will return you to the Home display.

The Home display Check that the MAN light is on. The upper readout shows the measured

temperature, or process value. The lower readout shows the % output.

To adjust the output, press or . . (Note: If Output Rate Limit has been enabled,

then the lower readout will show the working output. If or . is pressed, it will change to show and allow adjustment of, the target output.)

Press once. Display units A single press of flashes the display units

for 0.5 seconds, after which you are returned to the Home display. Flashing of the display units may have been disabled in configuration, in which case a single press will take you straight to the display shown below.

Press twice. Setpoint

To adjust the setpoint value, press or .

Press .

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PARAMETERS AND HOW TO ACCESS THEM Parameters are settings, that determine how the controller will operate. For

example, alarm setpoints are parameters that set the points at which alarms will occur. For ease of access, the parameters are arranged in lists as shown in the navigation diagram on Pages 2-10 and 2-11. The lists are:

Home list Probe list Care list User list Alarm list

Each list has a ‘List Header’ display. List header displays

Figure 2-5 Typical list header

display

A list header can be recognized by the fact that it always shows ‘LiSt’ in the lower readout. The upper readout is the name of the list. In the above example, ‘AL’ indicates that it is the Alarm list header. List header displays are readonly.

To step through the list headers, press . Depending upon how your controller has been configured, a single press may momentarily flash the display units. If this is the case, a double press will be necessary to take you to the first list header. Keep pressing to step through the list headers, eventually returning you to the Home display.

To step through the parameters within a particular list, press . When you reach the end of the list, you will return to the list header. From within a list you

Autotune list PID list Motor list Setpoint list Input list

List name

Always displays LiST

Output list Communications

list

Information list Access list.

AACC 2000 Carbon Nov. 1, 1997

+ 73 hidden pages

Marathon Computer AACC 2000 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual