Siemens UM344-2 User Manual

USER’S MANUAL

UM344-2
Issue 1

August 1995

XTC TRANSMITTERS

SERIES 344 TERMPERATURE TRANSMITTERS

USER’S MANUAL

UM344-2 CONTENTS

TABLE OF CONTENTS

SECTION AND TITLE PAGE

1.0 INTRODUCTION................................................................................................................. 1-1

1.1 SECTION CONTENTS ......................................................................................................1-1

1.2 PRODUCT DESCRIPTION ...............................................................................................1-3

1.3 CONFIGURATION ........................................................................................................... 1-4

1.4 PRODUCT SUPPORT....................................................................................................... 1-4

2.0 XTC COMMUNICATOR .....................................................................................................2-1

2.1 DISPLAY.......................................................................................................................... 2-3

2.2 KEYPAD DESCRIP TION .................................................................................................2-3

2.2.1 Dedicated Keys ..........................................................................................................2-3

2.2.2 Function Keys ............................................................................................................ 2-5

2.3 LOOP CONNECTION....................................................................................................... 2-6

2.4 POWER .............................................................................................................................2-7

2.5 MXC SOFTWARE VERSION............................................................................................ 2-7

2.6 MXC MENU SCREENS AND PARAMETER MAP .......................................................... 2-7

3.0 INITIAL TRANSMITTER SET-UP..................................................................................... 3-1

3.1 COMMISSIONING TRANSMITTER ON THE BENCH OR IN THE FIELD ..................... 3-1

3.1.1 Test Equipment Needed.............................................................................................. 3-1

3.2 ESTABLISHING COMMUNICATION ..............................................................................3-3

3.3 TESTING THE TRANSMITTER, MXC, AND THE LOOP ................................................ 3-5

3.3.1 MXC Testing ............................................................................................................. 3-5

3.3.2 Transmitter Testing..................................................................................................... 3-6

3.3.3 Loop Testing.............................................................................................................. 3-7

3.4 REVIEW CONFIGURATION DATA ................................................................................ 3-7

3.5 CHECKING TRANSMITTER OUTPUT ............................................................................3-9

4.0 INSTALLATION................................................................................................................... 4-1

4.1 EQUIPMENT DELIVERY AND HANDLING................................................................... 4-1

4.1.1 Factory Shipment........................................................................................................ 4-1

4.1.2 Receipt of Shipment.................................................................................................... 4-1

4.1.3 Storage ...................................................................................................................... 4-1

4.2 ENVIRONMENTAL CONSIDERATIONS ........................................................................4-2

4.3 INSTALLATION CONSIDERATIONS............................................................................. 4-2

4.3.1 Mechanical ................................................................................................................4-2

4.3.2 Electrical.................................................................................................................... 4-3

4.3.3 Transmitter Operating Mode and Network Type ...........................................................4-3

4.3.3.1 Analog Mode .....................................................................................................4-4

4.3.3.2 Digital Mode ......................................................................................................4-4

4.3.4 Power Supply Requirements........................................................................................ 4-8

4.3.4.1 Point-To-Point Network..................................................................................... 4-9

4.3.4.2 Multi-Drop Network.......................................................................................... 4-9

4.3.5 Cable Capacitance and Maximum Length ..................................................................4-10

4.3.5.1 Cable Capacitance ........................................................................................... 4-10

4.3.5.2 Maximum Cable Length Calculation .................................................................. 4-10

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CONTENTS UM344-2

SECTION AND TITLE PAGE

4.3.6 Network Junctions....................................................................................................4-11

4.3.7 Safety Barriers ......................................................................................................... 4-12

4.3.8 Connection of Miscellaneous Hardware.....................................................................4-12

4.3.9 Determine Sensor Cable Requirements......................................................................4-13

4.3.10 2-Wire RTD Accuracy Limitations ..........................................................................4-14

4.3.11 Shielding and Grounding ..........................................................................................4-15

4.4 MECHANICAL INSTALLATION .................................................................................. 4-16

4.4.1 Pipe Mounting..........................................................................................................4-16

4.4.2 Flat Surface Mounting...............................................................................................4-19

4.4.3 Direct Mounting to Process ....................................................................................... 4-20

4.4.4 Local Digital Display Installation, Repositioning and Removal ...................................... 4-23

4.4.5 Electrical Conduit and Cable Installation ..................................................................... 4-26

4.4.5.1 Conduit ...........................................................................................................4-26

4.4.5.2 Cables.............................................................................................................4-28

4.4.5.3 Access to Transmitter Terminal Compartment ................................................... 4-28

4.5 ELECTRICAL INSTALLATION.....................................................................................4-29

4.6 HAZARDOUS AREA INSTALLATION .........................................................................4-33

5.0 ON-LINE AND OFF-LINE OPERATION........................................................................... 5-1

5.1 ON-LINE OPERATION .................................................................................................... 5-1

5.1.1 Using the MXC for Configuration................................................................................ 5-1

5.1.1.1 Sensor Input Block............................................................................................. 5-3

5.1.1.2 Operator Display Block...................................................................................... 5-5

5.1.1.3 Transmitter ID Block .........................................................................................5-6

5.1.1.4 Output Block .....................................................................................................5-7

5.1.1.5 Alarm Block...................................................................................................... 5-7

5.1.1.6 Setpoint Track and Hold Block........................................................................... 5-8

5.1.1.7 A/M Transfer Block.......................................................................................... 5-8

5.1.1.8 Controller Block................................................................................................. 5-9

5.1.1.9 End or Review Configuration ..............................................................................5-9

5.1.2 Downloading A Configuration....................................................................................5-10

5.1.3 Local Transmitter Operation......................................................................................5-11

5.1.3.1 Display Functions ............................................................................................. 5-12

5.1.3.2 Local Pushbutton Input Ranging........................................................................5-13

5.1.3.3 Local Pushbutton Damping Adjustment.............................................................5-15

5.1.3.4 Local Pushbutton AUTO/MANUAL, SETPOINT and VALVE Adjustments .....5-16

5.1.4 Quick Access Key Operation .................................................................................... 5-19

5.2 OFF-LINE OPERATION.................................................................................................5-22

5.2.1 Using Off-Line Operations to Access an Archive.......................................................5-22

5.2.2 Using an Archive in On-Line Memory.......................................................................5-24

6.0 CALIBRATION AND MAINTENANCE............................................................................. 6-1

6.1 CALIBRATION................................................................................................................. 6-1

6.1.1 Equipment Required.................................................................................................... 6-2

6.1.2 Transmitter Analog Output Calibration......................................................................... 6-2

6.1.2.1 Transmitter Normally Configured for Analog Mode ..............................................6-2

6.1.2.2 Transmitter Normally Configured for Digital Mode ...............................................6-5

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UM344-2 CONTENTS

SECTION AND TITLE PAGE

6.1.3 RTD/OHM Type Input Calibration .............................................................................. 6-6

6.1.3.1 RTD/OHM Calibration Check ............................................................................6-6

6.1.3.2 Current Source Calibration ................................................................................. 6-7

6.1.4 Thermocouple/Millivolt Type Input Calibration.............................................................. 6-9

6.1.4.1 Thermocouple/Millivolt Calibration Check............................................................ 6-9

6.1.4.2 Narrow/Wide Millivolt Calibration.....................................................................6-11

6.2 PREVENTIVE MAINTENANCE ....................................................................................6-12

6.2.1 Tool and Equipment Requirements ............................................................................. 6-12

6.2.2 Transmitter Exterior Inspection..................................................................................6-13

6.2.3 Transmitter Exterior Cleaning....................................................................................6-13

6.2.4 Transmitter Enclosure Interior Inspection...................................................................6-13

6.2.5 Transmitter Calibration..............................................................................................6-14

6.3 TROUBLESHOOTING....................................................................................................6-14

6.3.1 Preliminary Troubleshooting ......................................................................................6-14

6.3.2 Troubleshooting........................................................................................................6-15

6.3.2.1 Diagnostic Messages .......................................................................................6-15

6.3.2.2 Possible Transmitter Output Problems...............................................................6-19

6.3.3 Diagnosing a Defective Digital (LCD) Meter .............................................................6-22

6.3.4 Enclosure Thread Lubrication .................................................................................... 6-23

6.4 NON-FIELD-REPLACEABLE ITEMS ............................................................................6-23

6.5 ASSEMBLY REMOVAL AND REPLACEMENT ...........................................................6-24

6.5.1 Electronics Module Removal and Replacement...........................................................6-24

6.6 MAINTENANCE RECORDS..........................................................................................6-25

6.7 RECOMMENDED SPARE AND REPLACEMENT PARTS ............................................ 6-25

6.8 SOFTWARE COMPATIBILITY ...................................................................................... 6-26

6.9 RETURN SHIPMENT .....................................................................................................6-26

7.0 CIRCUIT DESCRIPTION .....................................................................................................7-1

7.1 ELECTRONICS ASSEMBLY............................................................................................. 7-1

7.2 THEORY OF OPERATION................................................................................................ 7-3

7.2.1 Thermocouple/Millivolt Input ........................................................................................ 7-3

7.2.2 RTD/OHMS Input....................................................................................................... 7-3

7.2.3 Signal Conversion........................................................................................................ 7-4

7.2.4 Communication Format ................................................................................................7-4

8.0 MODEL DESIGNATION AND SPECIFICATIONS ...........................................................8-1

8.1 MODEL DESIGNATION................................................................................................... 8-1

8.2 ACCESSORIES ................................................................................................................. 8-2

8.3 SPECIFICATIONS............................................................................................................ 8-5

8.3.1 Mechanical ................................................................................................................8-5

8.3.2 Functional and Performance ........................................................................................8-5

8.3.3 Two-Wire Cable......................................................................................................... 8-7

8.3.4 Sensor Inputs ............................................................................................................. 8-8

8.3.5 Environmental ............................................................................................................8-8

8.3.6 Hazardous Area Classification..................................................................................... 8-9

8.3.6.1 CSA Hazardous Locations Precautions .............................................................8-11

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CONTENTS UM344-2

SECTION AND TITLE PAGE

9.0 GLOSSARY........................................................................................................................... 9-1

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September 1995

UM344-2 CONTENTS

SECTION AND TITLE PAGE

A.0 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS ...................................................A-1

B.0 APPENDIX B - HAZARDOUS AREA INSTALLATION .................................................. B-1

WARRANTY..............................................................................................................................W-1

PARTS LIST

LIST OF ILLUSTRATIONS

FIGURE AND TITLE PAGE

1-1 Basic Model 344....................................................................................................................... 1-2

1-2 Terminal Connections................................................................................................................ 1-3

2-1 Moore XTC Communicator (MXC)............................................................................................ 2-2

2-2 Major MXC Menu Screens ........................................................................................................2-2

2-3 Parameter Map, MXC/Model 344.............................................................................................. 2-9

3-1 Bench Test Connections............................................................................................................ 3-2

3-2 Typical Field Test Connections ...................................................................................................3-2

4-1 Point-To-Point Network (Analog Mode) .....................................................................................4-5

4-2 Model 352 SLDC and Model 344 Connections (Analog Mode)..................................................... 4-6

4-3 Multi-Drop Network (Digital Mode)........................................................................................... 4-7

4-4 Supply Voltage versus Network Resistance................................................................................ 4-8

4-5 Dimensions, Mounting Bracket for Model 344 ........................................................................... 4-17

4-6 Model 344 Mounting Configurations with Supplied Bracket ........................................................ 4-18

4-7 Transmitte r -To-Process Mounting........................................................................................... 4-21

4-8 Sensor Assembly ....................................................................................................................4-22

4-9 Digital Meter Orientation and Mounting Hardware....................................................................4-24

4-10 Digital Meter Repositioning and Removal................................................................................4-25

4-11 Conduit Drain and Explosion Proof Installations.......................................................................4-27

4-12 Signal (Loop), Sensor, MXC and Test Terminals .....................................................................4-30

4-13 Model 344 Sensor Wiring ....................................................................................................... 4-31

5-1 Model 344 Digital Meter .......................................................................................................... 4-32

6-1 Bench Calibration Connections ...................................................................................................6-4

6-2 Field Calibration Connections ..................................................................................................... 6-4

6-3 RTD/Ohm Current Source Calibration Set Up............................................................................. 6-8

6-4 TC/mV Input Accuracy Check and Calibration Set Up................................................................ 6-9

7-1 Model 344 Electronics Module Block Diagram............................................................................ 7-2

8-1 Typical TC and RTD Thermowell Assemblies without Heads ...................................................... 8-3

8-2 Typical TC or RTD Thermowell Assembly with a Head.............................................................. 8-3

8-3 Model 344 Dimensions .............................................................................................................. 8-6

September 1995

v

CONTENTS UM344-2

SECTION AND TITLE PAGE

LIST OF TABLES

4.1 Operating Mode and Network Type ........................................................................................... 4-3

4.2 Thermocouple and Extension Grade Wire Characteristics ..........................................................4-32

5.1 Output Display Code Choices...................................................................................................5-12

6.1 Self -Diagnostics Troubleshooting.............................................................................................. 6-16

6.2 Message - No Transmitter Found.............................................................................................6-17

6.3 Message - Communication Error ..............................................................................................6-18

6.4 Message - Field Device Malfunction.........................................................................................6-19

6.5 Symptom - Zero or Low Output ...............................................................................................6-19

6.6 Symptom - High Output...........................................................................................................6-20

6.7 Symptom - Output Current Fixed Below Scale at Approximately 3.84 mA ..................................6-21

6.8 Symptom - Output Current Fixed Above Scale at Approximately 21.8 mA ..................................6-11

6.9 Symptom - Erratic Output........................................................................................................6-11

8.1 Model 344T Model Designation ..................................................................................................8-1

8.2 General Accessories.................................................................................................................. 8-2

8.3 Thermal Sensors ....................................................................................................................... 8-2

8.4 Replacement Thermocouples and RTDs for 344T Temperature Elements .....................................8-4

8.5 Thermocouple Wire ...................................................................................................................8-4

8.6 Sensors: Type, Range, Span, and Accuracy................................................................................. 8-5

CHANGES FOR ISSUE 1, OCTOBER 1996

Section 8.3.2 At “Maximum Loop Voltage”, reference to Ex N use added.

Section 8.3.6 Ex N requirement added.

The cover date has been changed, however, page dates were not changed at this time. Change bars were
placed on revised pages in the outside margins.

XTC is a trademark of Moore Products Co.
HART is a registered trademark of the HART Communication Foundation.
All other trademarks are the property of their respective owners.

Moore Products Co. assumes no liability for errors or omissions in this document or for the application and use of information
included in this document. The information herein is subject to change without notice.



vi

September 1995

CONTENTS UM344-2

vi

September 1995

1-1

UM344-2 INTRODUCTION

1.0 INTRODUCTION

This User’s Manual is for the XTC™ Model 344 Smart Temperature Transmitter. It covers both the
Transmitter-Controller and Transmitter only versions.

NOTE

Throughout this Manual the term Transmitter will include both versions
except when the Transmitter-Controller is specifically stated and when
discussing unique Transmitter-Controller features, such as the Controller
function block.

All information needed to bench test, install, configure, system test, and service a transmitter is included in
this User’s Manual. Figure 1-1 shows the basic Model 344. Figure 1-2 shows the two terminal strips for
loop, sensor, display, and test equipment connections .

IMPORTANT

Save this User's Manual for installing, configuring, operating and servicing

a Model 344 transmitter.

1.1 SECTION CONTENTS

Nine sections make up this Manual. A brief description of each section follows.

Section 1, INTRODUCTION, describes each section in this Manual and provides a brief description of
the Model 344 Smart Temperature Transmitter line.

Section 2, XTC COMMUNICATOR (MXC), describes use of the MXC to test, configure, and calibrate a
transmitter.

Section 3, INITIAL TRANSMITTER SETUP, provides procedures to perform a bench test of the
transmitter to ensure pr oper operation of all functions. Start-up configuration is described here. If desired,
go to Section 5 to perform a complete configuration.

Section 4, INSTALLATION, furnishes specific information for mechanical and electrical installation.

Section 5, ON-LINE AND OFF-LINE OPERATION, describes on-line and off-line configuration, and
the use of the transmitter’s zero and full-scale pushbuttons.

Section 6, CALIBRATION AND MAINTENANCE, provides calibration procedures for analog and
digital modes. It also furnishes preventive maintenance, troubleshooting, and assembly replacement
procedures. A spare and replacement parts list is provided at the back of this Manual.

Section 7, CIRCUIT DESCRIPTION, contains an assembly level circuit description to support transmitter
servicing.

September 1995

1-2

INTRODUCTION UM344-2

4 Places

Section 8, MODEL DESIGNATION AND SPECIFICATIONS, furnishes tables describing transmitter
model numbers, and it contains mechanical, functional, performance, and environmental specifications.
Hazardous area certifications are also lis ted.

Before installing or servicing a transmitter, read the information on the nameplate and ensure that the
correct model is at hand and that the correct procedures are followed.

Section 9, GLOSSARY, contains definitions of various transmitter related terms.

APPENDIX A describes transmitter function blocks and the parameters available.

APPENDIX B contains hazardous area installation drawings and information needed for barrier selection.

WARRANTY contains the product warranty statements and information concerning servicing of the
product during the warranty period.

PARTS LIST shows an exploded view of the transmitter and a list of on-hand spare parts and field
replaceable parts.

Rotate Nameplate to Access Zero

and Full Scale Pushbuttons

Electrical Entrance

1/2 NPT or M20 X 1.5

Tapped Hole

2 Places

Z FS

Digital Meter Option Electrical Connections

Enclosure Cap

Quanitity 2

Mounting Hole

1/4-20 Thread

FIGURE 1-1 Basic Model 344

X02801S1

Ground Connection

TESTSIGNAL

+ -

321

Terminal

Strips

Shown with Enclosure

Cap Removed

September 1995

1-3

UM344-2 INTRODUCTION

Ohms,or mV Input

MXC

Connections

Signal (+)

Terminal

Signal (-)

Terminal

Test (+)

Terminal

SIGNAL

+

TEST

Test (-)

Terminal

Ground

Screw

Notes:

-

Sensor Terminals for
Thermocouple, RTD,

1. Viewed with enclosure cap
removed.

2. MXC = Moore XTC
Communicator.

X02869S1

FIGURE 1-2 Terminal Connections

1.2 PRODUCT DESCRIPTION

The Model 344 Temperature Transmitter, shown in Figure 1-1, is a microprocessor -based measurement
and control device which combines accurate, reliable temperature measurement and a PID controller in
one unit. The Transmitter accepts an RTD, thermocouple, millivolt, slide wire or resistance sensor input.
It contains a custom ASIC (Application Specific Integrated Circuit) which contains standard temperature
calibration curves for J, K, E, T, R, S, B and N type thermocouples and US/DIN curves for 100, 200, and
500 ohm Platinum RTDs. The sensed signal is linearized and corrected for ambient temperature changes
by the microprocessor and then converted to an equivalent 4-20 mA or HART® (Highway Addressable
Remote Transducer) digital output signal.

The analog output signal, HART digital communications, and 24 Vdc power (typical) are carried on a
twisted-pair 2-wire cable. The HART digital communication signals are superimposed (AC coupled) onto
the 4-20 mA loop current allowing simultaneous communication with the Transmitter without
compromising loop integrity. A digital meter is available when local indication of transmitter output is
required. Loop wiring connections made to the electrical terminals shown in Figure 1-2.

A transmitter can be configured to operate in either an analog mode or a digital mode, for a Point-To-Point
or a Multi-Drop network respectively.

ANALOG MODE: A single transmitter is connected to a controller, recorder or other field device. A loop
known as a Point-To-Point Network interconnects the instruments. The transmitter's output is the process
variable and it is sent to a controller or recorder using a standard 4-20 mA analog current.

September 1995

1-4

INTRODUCTION UM344-2

The HART protocol is used for communication between the transmitter and a Moore XTC Communicator
(MXC), a personal computer running MXTC Configuration Software or other remote device. A typical
communication can be to: transfer a new and edited configuration, remotely monitor the process variable,
or service a transmitter.

DIGITAL MODE: One to fifteen transmitters can be parallel connected to a Multi-Drop Network using
only twisted-pair cable. The HART protocol is employed to send all process variable information to a
HART-compatible controller, recorder, or other device.

A mounting bracket is included and permits either pipe mounting (2" pipe) or wall mounting. When
attached to a thermowell, the Transmitter can be mounted directly to a process vessel, chamber, or flow
pipe.

1.3 CONFIGURATION

A smart transmitter must be configured before being used on-line or off-line. Each transmitter is shipped
with either a default configuration or, if specified at time of order, a custom configuration defined by the
user. A default configuration may need to be edited by the user befor e the transmitter is used in a loop.

1.4 PRODUCT SUPPORT

Product support can be obtained from the Moore Products Co. Technical Information Center (TIC). TIC is
a customer service center that provides direct phone support on technical issues related to the functionality,
application, and integration of all products supplied by Moore Products Co.

To contact TIC for support, either call 215-646-7400, extension 4TIC (4842) or leave a message in the
bulletin board service (BBS) by calling 215-283-4958. The following information should be at hand when
contacting TIC for support:

• Caller ID number, or name and company name

When someone calls for support for the first time, a personal caller number is assigned. This number is

mailed in the form of a caller card. Having the number available when calling for support will allow the
TIC representative taking the call to use the central customer database to quickly identify the caller’s
location and past support needs.

• Product part number or model number and version

• If there is a problem with a product’s operation:

• Is the problem intermittent or constant?

• What steps were performed before the problem occurred?

• What steps have been performed since the problem occurred?

• What symptoms accompany the problem? Is an error message displayed?

• What is the installation environment? For example:

- type of plant and process, involved loop, control strategy, and related equipment.

- workstation or personal computer manufacturer and model, amount of memory, and
operating system.

For product support outside of North America, contact your nearest Moore Products Co. subsidiary.

September 1995

UM344-2 XTC COMMUNICATOR

Personal Computer

2.0 XTC COMMUNICATOR

The Moore XTC Communicator (MXC) is a HART protocol-based, hand-held instrument capable of
communicating with HART conformant instruments from Moore Products Co. and from other
manufacturers. It provides full access to on-line and off-line configuration data and to monitoring of
process variables. An MXC is shown in Figure 2-1.

When used with HART-conformant field instruments, the MXC can:

• Store up to 100 instrument configurations in its non-volatile memory.

• Download a stored configuration from the MXC to an on-line instrument (e.g., a transmitter).

• Upload a configuration from an on-line instrument to the MXC

• Store configurations created at and downloaded from a personal computer running Moore XTC

Configuration Software.

• Communicat e with a field instrument from any point in the loop.*

Stored
Configurations
(Archives)

X02856S0

Configuration Transfer

MXC

Moore XTC
Communicator

Configuration Transfer

Model 344

Temperature Transmitter

The MXC and the field instruments with which it communicates use the HART protocol for remote
communications. HART uses Frequency Shift Keying (Bell 202 standard) to superimpose digital signaling
on the standard 4-20 mA analog signal. Since there is no net energy change, the analog signal will not be
disturbed and loop integrity is maintained.

An MXC can be used on-line and off-line. On-line, it can display process data from a field instrument or
transfer a configuration between the MXC and a field instrument. Off-line, it is used to create a
configuration or to edit a configuration stored in the MXC. Off-line, an MXC can communicate with a
personal computer to transfer configurations between the MXC and personal computer.

In the following sections, MXC hardware and software will be described. Included in this description will
be the display, keypad, wiring, and power requirements. In addition, at the end of this section, major MXC
menu screens are shown in Figure 2-2 and Model 344 parameters accessible through the MXC are
shown.

* Between the sense resistor and instrument in a non-hazardous area installation. Between the sense resistor and a barrier

in a hazardous area installation.

September 1995

XTC COMMUNICATOR UM344-2

2-2

MOORE XTC COMMUNICATOR

ON F1

TRANS.

VAR'S

CHANGE

SP

CHANGE

VALVE

A/M

TUNE

BACK

LIGHT SHIFT SHIFT SHIFT

TREND ZOOM

A B C

1

J K L

4

S T U V W X Y Z #

7

@ % &

__

F2 F3

STATUS

D E F G H I

2 3

M N O P Q R

5

8 9

SPACE0+ / *

F4

OFF

6

.

X02665O0

Figure 2-1 Moore XTC Communicator (MXC)

September 1995

UM344-2 XTC COMMUNICATOR

2.1 DISPLAY

The MXC has a 5 by 8 dot matrix Liquid Crystal Display (LCD) with
four lines of twenty characters each to show configuration
parameters, operating status , on-line variables, and trends. The LCD
has a back light that can be turned on for viewing in dimly lighted

SELECT BLOCK TO EDIT

- SENSOR INPUT ­ SEL­PREV NEXT END ECT

areas.

All MXC screens have a similar layout. As shown here, most configuration screens use the top two lines
to describe the current screen, and the lower two lines to show the selections available from this screen.
Selections are entered by pressing keys on the MXC keypad. Some on-line variable and trend screens are
slightly different from that shown here, but they will always have a selection to access the next screen.

A blinking infinity symbol (∞) at the lower right corner of the screen indicates that the MXC is
communicating with a field instrument or a personal computer. No keyboard keys should be pressed until
the symbol is cleared upon completion of the communication.

2.2 KEYPAD DESCRIPTION

The thirty-key keypad is shown in Figure 2-1. It contains dedicated keys, alphanumeric keys with shift
keys, and function keys. These keys are color coded as follows:

Ÿ Red - dedicated ON key
Ÿ Black - dedicated OFF key
Ÿ Gray - function keys and dedicated keys (for controller block, on-line monitoring, and MXC functions)
Ÿ White - dedicated alphanumeric, symbol, and shift keys

A dedicated key performs a given function no matter what screen is showing. A function key is
dependent upon the action being performed and the MXC's firmware; available selections are shown on
the screen's bottom two lines.

2.2.1 Dedicated Keys

ON - This key powers up the MXC and initiates the MXC self -test. Press and hold the key until the
Moore logo appears and then release it. If the MXC fails self -test, a warning message will be displayed.

The MXC will now show the options available: communicate with a field instrument or personal computer
or do off-line configuration. These topics are discussed further in Section 5.

To conserve battery power, the MXC will shut off after 10 minutes if no keypad key is pressed. This
auto-shut-off is disabled when the MXC is on-line (e.g., displaying a process variable).

OFF - This key powers down the MXC. It may be used at any time. During configuration, however,
care should be taken so important information is not discarded. When the MXC is in certain modes and
communicating with a field instrument or personal computer, it will query the user as to whether or not it
should be turned off in this mode.

September 1995

XTC COMMUNICATOR UM344-2

2-4

BACK LIGHT - This key turns on the LCD back light for easier viewing of the display in a dimly lighted
area. The back light is activated by pressing the key and is deactivated by again pressing the key.

NOTE

The back light consumes significant power. To extend battery life, use

the back light only when needed.

TRANS. VAR'S. - The Transmitter Variables key is a quick access key that is pressed to display a
screen showing the transmitter's on-line parameters: measured variable (MV), current output (I), process
variable (PV) and their respective units. Exit this screen by again pressing the TRANS. VAR'S. key or
by pressing the F4 key, for END. If the transmitter is conf igured as a transmitter-controller you will be
prompted to choose either transmitter variables or controller variables. Controller variables include process
variable, setpoint and valve.

TREND - The TREND key is another quick access key that is pressed to trend a variable and show up to
thirteen samples. Any one of the following variables can be trended: the measured variable (MV), the
current output (I), or the process variable (PV). The trend sampling rate can be set to 1-300 seconds
between samples. Exit this screen by again pressing the TREND key or by pressing the F4 key, for END.

ZOOM - The ZOOM key is a quick access key that allows a closer examination of a variable chosen in
the Trend screen. This key functions only when a Trend screen is displayed.

ZOOM magnifies a range of values equal to 10% of the span. The midscale value is user selected.
For example, when viewing a range of 0-100% in the Trend screen, the value of 50% is chosen to zoom
on. The Trend screen now shows a range of 45-55%. Exiting the Zoom screen again displays the Trend
screen. Exit the Trend screen to return to the Main Menu.

STATUS - The STATUS key is a quick access key that is pressed to display the Status screen. This
screen will show the instrument tag name, model number, software revision number, serial number, and
functional statuses such as fixed current mode and error conditions. Exit the Status Screen by again
pressing the Status key or by pressing the F4 key.

CHANGE SP, CHANGE VALVE, A/M, and TUNE Keys - These are dedicated keys that are
reserved for use with XTC Model 340 and 344 Transmitter-Controllers. These keys are inactive when
communicating with an instrument that does not have a controller function block.

CHANGE SETPOINT - Press the CHANGE SP key to view and change the value of the online ­setpoint of the controller in either automatic or manual mode. If the controller is in MANUAL with
tracking setpoint, then the setpoint cannot be changed. The SP is displayed in the same units as the
transmitter dis play configured in the operator’s display function block. Press the “CHANGE SP” key
again, or F3, to exit this mode.

CHANGE VALVE - This key allows you to view and change the position of the valve. If the
controller is in AUTO, the valve cannot be changed. Press the “CHANGE VALVE” key again, or
F3, to exit this mode.

September 1995

UM344-2 XTC COMMUNICATOR

AUTO/MANUAL - The A/M key toggles the controller between automatic and manual control.

Press the “MANUAL”, key F1, or “AUTO”, key F2 to change state. Press “A/M” key again, or F4,
to exit this mode.

TUNE - This key allows tuning of the controller. The first screen displays the controller action,
DIRECT or REVERSE. The controller action may be viewed from the TUNE key, but it must be
changed in the configuration mode. Press F4 to continue.

The Proportional Gain (PG), Time Integral (TI) and Time Derivative (TD) can be changed from this
screen. Press F1, F2 or F3 to display the current value and edit the parameter. Press “CONT”, key
F4 to continue.

The Derivative Gain (DG) and Manual Reset (MR) can be changed from this screen. Press F1 or F2
to display the current value and edit the parameter. Press F4 to go to the previous screen. Press the
“TUNE” key again, or F3, to exit this mode.

ALPHANUMERIC Keys - Twelve white keys with alphanumeric characters and symbols are located
toward the center of the keypad area. Pressing a 1-9, 0, -, or . key will display that character on the
screen. These keys also have alphabetic characters and symbols that require the use of a SHIFT key.
These numbers, letters and symbols are typically used in writing a range, damping value, tagname,
message, or descriptor.

SHIFT Keys - Three shift keys are located below the alphanumeric keys. They are used to access a
letter or symbol located in the upper left, center, or right portion of an alphanumeric key. To select an
alphabetic character or upper symbol, press the proper SHIFT key (left, center, or right arrow) and then
press the desired alphanumeric or symbol key.

2.2.2 Function Keys

F1, F2, F3, and F4 - The function keys are the gray keys located just below the MXC display. The
function or action performed by each key is shown on the bottom two lines of the display, immediately
above each key. For example, when the MXC is first turned on and the Main Menu screen appears, the
following selections are aligned with the function keys: F1 - FIND
XMTR, F2 - ARCH FUNC, F3 - TEST MXC, and F4 - END. To
make a selection, press the corresponding Function key and the next
screen will appear. These keys are used extensively when
configuring or monitoring a field instrument.

SELECT FUNCTION

FIND ARCH TEST
XMTR FUNC MXC END

September 1995

XTC COMMUNICATOR UM344-2

2-6

2. Connect the MXC only in a non-hazardous area.

2.3 LOOP CONNECTION

The MXC is quickly connected into a transmitter loop. A 40" (1m) cable with a dual banana plug on one
end and two mini-grabber clips on the other is provided. The dual banana plug is inserted into the bottom
of the MXC. The mini-grabber clips are connected to the Model 344's signal terminals or to the loop's
current sense resistor, usually at a receiving instrume nt such as a Model 352 Single -Loop Digital Controller
(see notes below). This is a non-polar connection. The MXC can now communicate with the transmitter
from the control room or a field location. The diagram below shows a basic loop with the MXC connected
at various locations.

NOTE

The HART protocol requires a network (loop) resistance between
250Ω and 1100Ω to support communications. See Section 4.3.5 to
determine resistance value.

IMPORTANT

In a hazardous area installation, connect the MXC on the safe side
of the barrier, between the current sense resistor and the barrier.

Current Sense
Resistor, 250 to
1100 Ohms

Controller,
Recorder,
Indicator,
or other
Device

Notes:

1. Connect an MXC to any of the locations shown.

+
_

MXC

MXC

X02849S1

MXC

Signal Test

_

+

+

Model 344

Terminals

_

September 1995

UM344-2 XTC COMMUNICATOR

2.4 POWER

Six "AA" alkaline batteries are supplied with the MXC. Remove
the rear cover to access the battery compartment, as shown in the
figure. Typical operating time of the MXC with new batteries and
the back light off is approximately 80 hours; with new batteries and
the back light on, approximately 30 hours.

A Low Battery indicator (LB) is displayed in the lower right corner
of the LCD when about one -half of the battery charge is spent.
Fresh batteries should then be available for installation.

++

+

+

+

+

+

Battery
Access
Cover

Batteries

Captive
Screw

NOTE

If the MXC fails due to low batteries, data in the On-Line

Memory section of the MXC will be lost. The MXC
should not be used to troubleshoot critical loops while the
low battery indicator is showing.

The MXC will automatically conserve battery life when in the configuration mode. After approximately
ten minutes with no keys on the keypad being pressed, the MXC will shut itself off. This will not occur
while the MXC is monitoring variables from a field instrument.

2.5 MXC SOFTWARE VERSION

To read an MXC's software version, perform the following steps.

1. Press and hold the MXC's ON key until the MOORE logo appears on the display.

2. Watch the MXC display. The MXC's software version will be momentarily displayed.

3. Press the OFF key or continue on to configure or monitor a transmitter.

2.6 MXC MENU SCREENS AND PARAMETER MAP

Major MXC menu screens are shown in Figure 2-2. The screen's name appears in the left column.
These screens are shown in block form in Figure 2-3.

Figure 2-3 is a Parameter Map which shows general configuration and calibration flow. Detailed
configuration procedures are given in Section 5 of this Manual. Calibration is described in Section 6.

September 1995

XTC COMMUNICATOR UM344-2

2-8

OVRD

QUIT SAVE VIEW LOAD

Main Menu

On-Line Menu

On-Line Configuration Menu

Calibrate/Test Menu

Function Block Menu

Configuration Complete Menu

Loop Override Menu

MXC screens X02781S0

SELECT FUNCTION

FIND ARCH TEST
XMTR FUNC MXC END

Dev ID: 210300003C
Tag: TTC-101 ADD: 00

LOOP CAL/ CON -

TEST FIG

CONFIGURATION MODE

END

EDIT EDIT
ARCH CONF END

CALIBRATE / TEST

CAL TEST END

SELECT BLOCK TO EDIT

- SENSOR INPUT ­ SEL­PREV NEXT END ECT

CONFIGURATION
COMPLETE
RE- DOWN

LOOP OVERRIDE - CHOOSE
CURRENT OUTPUT LEVEL

4 MA 20 MA OTHR END

FIGURE 2-2 Major MXC Menu Screens

September 1995

UM344-2 XTC COMMUNICATOR

MAIN MENU

TEST

MXC

MXC SELF TEST MENU

TEST

KEYS

TEST

SCRN

END

END

ON-LINE
MENU

LOOP
OVRD

PRO­CEED

LOOP
OVERRIDE

MENU

20mA

4mA

ABORT

ENTER

END

ABORTABORT

ENTER

END

ANA-

LOG

FIND

XMTR

DIGI

-TAL

SRCH

TAG

ENTER

TAG

END

NOTE:
This Map is intended to show

general configuration and
calibration flow. Every key
and screen is not shown.

SHORT

ADDR

POLL

END

CALIBRATE/TEST
MENU

CAL/
TEST

CONF

CAL

TEST

END

ON-LINE
CONFIG­URATION
MENU

EDIT

ARCH

EDIT

CONF

END

OTHER

PRO­CEED

ABORT ABORT

ENTER
ARCH#

QUIT

QUIT

ENTER

mA

SELF
TEST

CONT

ABORT

END

END

PRO-

CEED

DOWN

LOAD

END

EDIT

ARCH

CONT

ABORT

DOWN

LOAD

QUIT

CONT CONT

TRIM

DAC

ZERO

ABORT

ABORT

CONT

ABORT

ARCH

FUNC

END

X02882S1

September 1995

ENTER
ARCH#

RE-

START

EXIST

NOT

EXIST

TEMPERATURE TRANSMITTER

SELECT

TYPE

END

EDIT

ARCH

END

CONT

END

FUNCTION BLOCK
MENU

END

SENSOR INPUT

OUTPUT

OPERATOR DISPLAY

TRANSMITTER ID

ALARM

SP TRACK & HOLD

A/M TRANSFER

CONTROLLER

FIGURE 2-3 Parameter Map, MXC/Model 344

CONFIGURATION
COMPLETE MENU

SAVE

REVIEW

DOWN

LOAD

QUIT

DOWN

LOAD

ABORT

XTC COMMUNICATOR UM344-2

2-10

September 1995

UM344-2 INITIAL TRANSMITTER SET-UP

3-1

3.0 INITIAL TRANSMITTER SET-UP

Before operating a Model 344 on-line, the instrument should be commissioned using the MXC and set-up
either at the bench or in the field. Commissioning consists of checking that the transmitter and the loop
are operational and that all configuration information is correct. This section contains step-by-step
procedures describing commissioning of the transmitter. For an in -depth discussion of transmitter
configuration, refer to Section 5.1 On-Line Operation.

3.1 COMMISSIONING TRANSMITTER ON THE BENCH OR IN THE FIELD

A Model 344 can be commissioned either before or after installation into the loop. Commissioning on the
bench before installation is suggested. A complete transmitter functional test can be performed and
configuration procedures can be practiced. If commissioning after installation, install the transmitter as
described in Section 4 and then return to this section. Configuration data for the transmitter will be
needed.

To commission the transmitter on the bench, make the connections shown in Figure 3-1. To commission
the transmitter in the field, make the connections shown in Figure 3-2 or those shown in Section 4.3.3,
Figure 4-1, 4-2, or 4-3. Connect the MXC in the loop either across the current sense resistor or, often
more conveniently, across the two signal terminals of the Model 344 (non-hazardous area only).

3.1.1 Test Equipment Needed

TEST EQUIPMENT DESCRIPTION (see Specifications, Section 8.3.2)
Power Supply 12 to 42 Vdc, see Section 4.3.4

Multimeter:

Current

Voltage
Current Sense Resistor

Accuracy of at least .05% to check calibration

Range: 4 to 20 mA to measure loop current

Range: 10-40 Vdc to measure power supply and loop voltage
250 to 1100Ω to support HART digital communications

Configuration Device Moore XTC Communicator (MXC)
User Configuration Configuration data for transmitter under test

NOTE

Test equipment should be 2 to 10 times more accurate than the desired

transmitter accuracy.

September 1995

INITIAL TRANSMITTER SET-UP UM344-2

3-2

MXC

250

Bench Power
Supply (DC)

X02807S1

_

+

Signal Test

_

+

+

_

Model 344

Terminals

Resistance

Decade

Box

+

_

Digital
Milliammeter

FIGURE 3-1 Bench Test Connections

Controller,
Recorder,
Indicator, or
other 1-5 Vdc
Device

System
Power
Supply

X02808S1

Circuit
Junction

+

250

_

_

+

MXC

Signal

_

+

Test

_

+

Model 344

Terminals

+
_

Sensor

Wires

Digital
Milliammeter

FIGURE 3-2 Typical Field Test Connections

September 1995

UM344-2 INITIAL TRANSMITTER SET-UP

3-3

3.2 ESTABLISHING

COMMUNICATION

SELECT FUNCTION

FIND ARCH TEST
XMTR FUNC MXC END

SEARCH FOR WHAT TYPE
OF TRANSMITTER?
ANA- DIG- SRCH
LOG ITAL TAG END

ENTER TAG TO SEARCH
WITH:
EN­ < > QUIT TER

1. Connect the transmitter as shown in either Figure 3-1
or 3-2.

2. Apply power to the loop.

3. Press and momentarily hold the MXC's ON key.
The first screen that will appear after the initial
power up screens is the Main Menu, shown
adjacent. Press FIND XMTR (F1) to have the
MXC initially establish communication with the
Model 344.

4. From the next screen, select either Analog, Digital,
or Search Tag to begin communication with the
transmitter. Read the following and then press one
of the four following keys (F1, F2, F3, or END).

ANALOG (F1) - Press to search for an analog

mode transmitter. Analog mode is used when there
is one transmitter in the loop and it has an address of
zero. If all Point-to-Point Network connections are
correct, when the MXC finds a transmitter with an
address of “0”, the MXC will display the ID and
TAG. Go to Step 6.

If a problem exists in the Transmitter or Network

Wiring, the MXC will show “NO TRANSMITTER
FOUND”. Go to Section 6.3 Troubleshooting to
confirm and resolve wiring problems.

DIGITAL (F2) - Press to search for a digital (multi -

drop) mode transmitter. Digital mode allows up to 15
transmitters to be connected to the loop. Each
transmitter in a loop is assigned a unique address
between 1 and 15. Go to Step 5.

SRCH TAG (F3) - Press to search for a specific

transmitter. Search can be used when the
transmitter is in either Analog or Digital mode. Type
the tagname (8 character alphanumeric string) of the
transmitter that is to be configured or interrogated
and press ENTER (F4). To edit the tagname, use
the arrow keys to select any character that needs to
be changed. Go to Step 6.

If a problem exists in a transmitter or loop wiring the

MXC will show “NO TRANSMITTER FOUND”.

END - Press to return to the previous screen.

September 1995

INITIAL TRANSMITTER SET-UP UM344-2

3-4

SHORT OR LONG FORM
ADDRESS?
SHRT LONG
ADDR ADDR POLL END

ENTER TRANSMITTER
ADDRESS (1-15)
EN­ < END TER

ENTER TRANSMITTER
ADDRESS:
EN­ < END TER

SEARCHING FOR
TRANSMITTER

PLEASE WAIT

XMTR ID: 210100044F
TAG: MPCO 340 ADD: 01
LAST NEXT SEL­XMTR XMTR END ECT

NOTE

Analog and Digital modes are

discussed in detail in Section 4.

5. The MXC will next prompt for a digital method of
searching. Press one of the following keys.

SHRT ADDR (F1) - Press and then enter the short

address (1-15) stored during configuration.

IMPORTANT

The factory default setting for the short

address is 0, analog mode.

LONG ADDRESS (F2) - Press and then enter the

long address stored in memory at the factory. (The
long address, the Dev. ID shown in the On-Line
Menu and the XMTR. ID shown by polling are the
same.) This address can not be altered.

POLL (F3) - Press to instruct the MXC to look for

any live addresses on the multi-drop network (1-15).
While the MXC is searching for one or more
transmitters, it will display SEARCHING. The MXC
will then display the long and short addresses of all
live transmitters on the network; select one by
pressing the SELECT (F4) key.

To view each of the live transmitters, press the

LAST XMTR and NEXT XMTR keys to scroll
forward and backward. Each screen will show the
transmitter ID number (i.e. device ID or long
address in hexadecimal), tagname, and short address.
Check IDs against user documentation to confirm
that all transmitters are present

If a problem exists in a transmitter or its wiring it will

be excluded from the poll. If a major fault exists in
the network wiring, the MXC will display the
warning message “NO TRANSMITTER FOUND”.
Go to section 6.3 Troubleshooting to confirm and
resolve wiring problems.

6. Communication has now been established between
the transmitter and MXC and the transmitter's
configuration has been uploaded to the MXC's On­Line Memory.

September 1995

UM344-2 INITIAL TRANSMITTER SET-UP

3-5

OVRD

The next screen to appear is used to save the

WOULD YOU LIKE TO
SAVE TRANSMITTER
DATA IN
ARCHIVES NO YES

configuration to an archive. If the configuration is to
be edited, press YES (F4) to save the configuration
in case a mistake is made. The next screen will
prompt for an archive number (0-99). The archive
number chosen will be the location where the MXC

ENTER ARCHIVE NUMBER
(0-99):
EN­ < > END TER

stores the transmitter's configuration data. Archiving
will be discussed in more detail in the Off-Line
portion of section 5.

The MXC can now be used to calibrate or configure the
transmitter, monitor loop parameters, or test loop

Dev ID: 210300003C
Tag: TTC-101 ADD: 00

LOOP CAL/ CON -

TEST FIG

END

functionality. Section 5 of this Manual describes
configuring and monitoring of the transmitter, and
calibration is described in Section 6. The screen
selections to choose the options of configuration,
calibration, and loop checkout are found on the On-Line
menu screen.

3.3 TESTING THE
TRANSMITTER, MXC, AND THE
LOOP

The test routines available through the MXC are used to
verify that the Transmitter, the MXC , and the loop are all
working properly. Whenever a problem with any of the
instruments or the loop is suspected, test the equipment
to make sure there are no component failures. The test
functions can be accessed in two locations in the MXC,
and these are described below.

3.3.1 MXC Testing

SELECT FUNCTION

FIND ARCH TEST
XMTR FUNC MXC END

MXC SELF TEST

PRESS ANY KEY TO
CONFIRM CONTACT
_ _ _ _ _ _ _ _ _ _ END
TEST

1. Press and momentarily hold the MXC's ON key.
The Main Menu will appear.

TEST TEST
KEYS SCRN END

2. Press TEST MXC (F3) to display the MXC Self
Test screen.

3. Press one of the following keys.

TEST KEYS - Press to test MXC keys. At the next

screen, press any key on the keyboard and the

September 1995

INITIAL TRANSMITTER SET-UP UM344-2

3-6

screen will display a character
associated with that key. The
screen will show up to 10 characters
before erasing the oldest.

September 1995

UM344-2 INITIAL TRANSMITTER SET-UP

3-7

MXC SCREEN TEST
ABOUT TO BEGIN

MXC SCREEN TEST
COMPLETED

3.3.2 Transmitter Testing

CALIBRATE / TEST

CAL TEST END

TEST - PERFORMS
DIAGNOSTIC TEST ON
TRANS- A- PRO­MITTER BORT CEED

WARNING! SELF TEST
MAY BUMP TRANSMITTER
OUTPUT A­ BORT CONT

TRANSMITTER PASSED
TRANSMITTER SELFTEST

CONT

TEST SCRN - Press to test all screen segments.

When this key is pressed, the MXC displays the
"Begin" message to the left, then lights all the
segments, turns them all off, displays the
"Completed" message, and the n returns to the
original test screen.

END - Press to exit the test mode and return to the

Main Menu screen.

Although the Transmitter continuously performs an on­line self test, a more extensive self test can be performed
after communication with the MXC has been established.

1. At the On-Line Menu, press CAL/TEST (F2) to
display the Calibrate and Test selections.

2. At the Calibrate/Test Menu, press TEST. A Test
caution screen will appear. Press one of the
following:

ABORT - Press to return to the Calibrate/Test

Menu.

PROCEED - Press to continue the self test. A

warning screen will be displayed then a message
states that the test is occurring. After the test, the
MXC will show whether or not the transmitter has
passed or failed the self test.

If the MXC indicates that the Transmitter has:
Passed - Press CONT then END.
Failed - Check installation wiring thoroughly. Go to

Section 6 for troubleshooting suggestions.

3. When the MXC displays the Transmitter’s ID (On­Line Menu), press the STATUS Key to check for
Transmitter errors. If an error is present, the
ERROR Key (F2) will be displayed. Press
ERRORS (F2) to check for ROM, RAM, EEPROM,
TIMER and SENSOR errors. Refer to Section 6.3
Troubleshooting to confirm and resolve the error.

4. If the alarm function is enabled, press ALARM (F1)
to check the ALARM OUT OF SERVICE status.

September 1995