YOKOGAWA EJA110A, EJA120A, EJA130A, EJA210A, EJA220A User's Manual

...

User’s Manual

Model EJA Series Fieldbus Communication Type

IM 01C22T02-01E

Yokogawa Electric Corporation

IM 01C22T02-01E

9th Edition

CONTENTS

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

Regarding This Manual................................................................................. 1-1

1.1 For Safe Use of Product ..................................................................... 1-1

1.2 Warranty.............................................................................................. 1-2

1.3 ATEX Documentation.......................................................................... 1-3

2. HANDLING CAUTION ................................................................................... 2-1

2.1 Installation of an Explosion-Protected Instrument .............................. 2-1

2.1.1 FM approval................................................................................... 2-1

2.1.2 CSA Certification ........................................................................... 2-5

2.1.3 CENELEC ATEX (KEMA) Certification ......................................... 2-5

2.1.4 IECEx Certification ........................................................................ 2-9

3. ABOUT FIELDBUS ....................................................................................... 3-1

3.1 Outline ................................................................................................. 3-1

3.2 Internal Structure of EJA..................................................................... 3-1

3.2.1 System/network Management VFD ............................................. 3-1

3.2.2 Function Block VFD ..................................................................... 3-1

3.3 Logical Structure of Each Block.......................................................... 3-1

3.4 Wiring System Configuration .............................................................. 3-1

4. GETTING STARTED .....................................................................................4-1

4.1 Connection of Devices ........................................................................ 4-1

4.2 Host Setting......................................................................................... 4-2

4.3 Bus Power ON .................................................................................... 4-3

4.4 Integration of DD................................................................................. 4-3

4.5 Reading the Parameters ..................................................................... 4-3

4.6 Continuous Record of Values ............................................................. 4-4

4.7 Generation of Alarm............................................................................ 4-4

5. CONFIGURATION.........................................................................................5-1

5.1 Network Design................................................................................... 5-1

5.2 Network Definition ............................................................................... 5-1

5.3 Definition of Combining Function Blocks ............................................ 5-2

5.4 Setting of Tags and Addresses .......................................................... 5-3

5.5 Communication Setting ....................................................................... 5-4

5.5.1 VCR Setting .................................................................................. 5-4

5.5.2 Function Block Execution Control ................................................ 5-5

5.6 Block Setting ....................................................................................... 5-5

5.6.1 Link Object ................................................................................... 5-5

5.6.2 Trend Object ................................................................................. 5-6

5.6.3 View Object .................................................................................. 5-6

5.6.4 Function Block Parameters .......................................................... 5-8

5.6.5 Transducer Block Parameters ...................................................... 5-9

IM 01C22T02-01E

CONTENTS

6. IN-PROCESS OPERATION .......................................................................... 6-1

6.1 Mode Transition .................................................................................. 6-1

6.2 Generation of Alarm............................................................................ 6-1

6.2.1 Indication of Alarm ....................................................................... 6-1

6.2.2 Alarms and Events ....................................................................... 6-1

6.3 Simulation Function............................................................................. 6-2

7. DEVICE STATUS .......................................................................................... 7-1

8. GENERAL SPECIFICATIONS ...................................................................... 8-1

8.1 Standard Specifications ...................................................................... 8-1

8.2 Optional Specifications........................................................................ 8-2

APPENDIX 1. LIST OF PARAMETERS FOR EACH BLOCK OF THE EJA ... A-1

A1.1 Resource Block ...................................................................................A-1

A1.2 Al Function Block ................................................................................ A-3

A1.3 Transducer Block ................................................................................ A-5

APPENDIX 2. APPLICATION, SETTING AND CHANGE OF BASIC

PARAMETERS ............................................................................................. A-7

A2.1 Applications and Selection of Basic Parameters................................ A-7

A2.2 Setting and Change of Basic Parameters .......................................... A-8

A2.3 Setting the AI1 Function Block ...........................................................A-8

A2.4 Setting the AI2 Function Block .........................................................A-10

A2.5 Setting the Transducer Block............................................................A-10

APPENDIX 3.

OPERATION OF EACH PARAMETER IN FAILURE MODE....

A-12

APPENDIX 4. PID BLOCK .............................................................................. A-14

A4.1 Function Diagram..............................................................................A-14

A4.2 Functions of PID Bock ...................................................................... A-14

A4.3 Parameters of PID Block ..................................................................A-15

A4.4 PID Computation Details...................................................................A-17

A4.4.1 PV-proportional and -derivative Type PID (I-PD)

Control Algorithm ........................................................................ A-17

A4.4.2 PID Control Parameters .............................................................A-17

A4.5 Control Output...................................................................................A-17

A4.5.1 Velocity Type Output Action.......................................................A-17

A4.6 Direction of Control Action ................................................................A-17

A4.7 Control Action Bypass.......................................................................A-17

A4.8 Feed-forward .....................................................................................A-18

A4.9 Block Modes......................................................................................A-18

A4.9.1 Mode Transitions.......................................................................A-18

A4.10Bumpless Transfer ............................................................................ A-19

A4.11Setpoint Limiters ...............................................................................A-19

A4.11.1 When PID Block Is in Auto Mode ............................................ A-19

A4.11.2 When PID Block Is in Cas or RCas Mode...............................A-19

IM 01C22T02-01E

CONTENTS

A4.12External-output Tracking ................................................................... A-19

A4.13Measured-value Tracking.................................................................. A-19

A4.14Initialization and Manual Fallback (IMan) ......................................... A-20

A4.15Manual Fallback ................................................................................ A-20

A4.16Auto Fallback ....................................................................................A-20

A4.17Mode Shedding upon Computer Failure........................................... A-21

A4.17.1 SHED_OPT .............................................................................. A-21

A4.18Alarms ............................................................................................... A-21

A4.18.1 Block Alarm (BLOCK_ALM) .....................................................A-21

A4.18.2 Process Alarms ........................................................................ A-21

A4.19Example of Block Connections ......................................................... A-22

A4.19.1 View Object for PID Function Block.........................................A-22

APPENDIX 5. LINK MASTER FUNCTIONS ................................................... A-24

A5.1 Link Active Scheduler .......................................................................A-24

A5.2 Link Master........................................................................................A-24

A5.3 Transfer of LAS.................................................................................A-25

A5.4 LM Functions.....................................................................................A-26

A5.5 LM Parameters..................................................................................A-27

A5.5.1 LM Parameter List......................................................................A-27

A5.5.2 Descriptions for LM Parameters ................................................A-29

A5.6 FAQs ................................................................................................. A-31

APPENDIX 6. SOFTWARE DOWNLOAD ....................................................... A-32

A6.1 Benefits of Software Download.........................................................A-32

A6.2 Specifications .................................................................................... A-32

A6.3 Preparations for Software Downloading ........................................... A-32

A6.4 Flow of Software Download ..............................................................A-33

A6.5 Download Files..................................................................................A-33

A6.6 Steps after Activating a Field Device................................................A-34

A6.7 Troubleshooting.................................................................................A-35

A6.8 Resource Block’s Parameters Relating to Software Download ....... A-35

A6.9 View Objects Altered by Software Download ...................................A-37

A6.10System/Network Management VFD Parameters Relating to

Software Download ...........................................................................A-38

A6.11Comments on System/Network Management VFD Parameters

Relating to Software Download ........................................................A-39

REVISION RECORD

iii

IM 01C22T02-01E

1. INTRODUCTION

This manual contains a description of the DPharp EJA Series Differential Pressure/Pressure Transmitter Fieldbus Communication Type. The Fieldbus communication type is based on the same silicon resonant sensing features as that of the BRAIN communication type, which is employed as the measurement principle, and is similar to the BRAIN communication type in terms of basic performance and operation. This manual describes only those topics that are required for operation of the Fieldbus communication type and that are not contained in the BRAIN communication type instruction manual. Refer to each of the following instruction manuals for topics common to the BRAIN communication and Fieldbus communication types.

Table 1.1 List of Individual User’s Manuals

EJA110A, EJA120A, EJA130A IM 01C21B01-01E EJA210A, EJA220A IM 01C21C01-01E EJA310A, EJA430A, EJA440A IM 01C21D01-01E EJA510A, EJA530A IM 01C21F01-01E EJA118W, EJA118N, EJA118Y IM 01C22H01-01E EJA438W, EJA438N IM 01C22J01-01E EJA115 IM 01C22K01-01E

T0101.EPS

 Regarding This Manual

•This manual should be passed on to the end user.

• Please note that changes in the specifications, construction, or component parts of the instrument may not immediately be reflected in this manual at the time of change, provided that postponement of revisions will not cause difficulty to the user from a functional or performance standpoint.

• The following safety symbol marks are used in this manual:

WARNING

Indicates a potentially hazardous situation which, if not avoided,

could

result in death or serious

injury.

CAUTION

Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It may also be used to alert against

unsafe practices

IMPORTANT

• The contents of this manual are subject to change without prior notice.

•Yokogawa makes no warranty of any kind with regard to this manual, including, but not limited to, implied warranty of merchantability and fitness for a particular purpose.

• If any question arises or errors are found, or if any information is missing from this manual, please inform the nearest Yokogawa sales office.

• The specifications covered by this manual are limited to those for the standard type under the specified model number break-down and do not cover custom-made instruments.

Indicates that operating the hardware or software in this manner may damage it or lead to system failure.

NOTE

Draws attention to information essential for understanding the operation and features.

1.1 For Safe Use of Product

For the protection and safety of the operator and the instrument or the system including the instrument, please be sure to follow the instructions on safety described in this manual when handling this instrument. In case the instrument is handled in contradiction to these instructions, Yokogawa does not guarantee safety. Please give your attention to the followings.

1-1

IM 01C22T02-01E

1. INTRODUCTION

(a) Installation

• The instrument must be installed by an expert engineer or a skilled personnel. The procedures described about INSTALLATION are not permitted for operators.

• In case of high process temperature, care should be taken not to burn yourself because the surface of body and case reaches a high temperature.

•The instrument installed in the process is under pressure. Never loosen the process connector bolts to avoid the dangerous spouting of process fluid.

•During draining condensate from the pressuredetector section, take appropriate care to avoid contact with the skin, eyes or body, or inhalation of vapors, if the accumulated process fluid may be toxic or otherwise harmful.

• When removing the instrument from hazardous processes, avoid contact with the fluid and the interior of the meter.

• All installation shall comply with local installation requirement and local electrical code.

(b) Wiring

• The instrument must be installed by an expert engineer or a skilled personnel. The procedures described about WIRING are not permitted for operators.

• Please confirm that voltages between the power supply and the instrument before connecting the power cables and that the cables are not powered before connecting.

• The use of this instrument is restricted to those who have received appropriate training in the device.

• Take care not to create sparks when accessing the instrument or peripheral devices in a hazardous location.

(f) Modification

• Yokogawa will not be liable for malfunctions or damage resulting from any modification made to this instrument by the customer.

1.2 Warranty

•The warranty shall cover the period noted on the quotation presented to the purchaser at the time of purchase. Problems occurred during the warranty period shall basically be repaired free of charge.

• In case of problems, the customer should contact the Yokogawa representative from which the instrument was purchased, or the nearest Yokogawa office.

• If a problem arises with this instrument, please inform us of the nature of the problem and the circumstances under which it developed, including the model specification and serial number. Any diagrams, data and other information you can include in your communication will also be helpful.

• Responsible party for repair cost for the problems shall be determined by Yokogawa based on our investigation.

• The Purchaser shall bear the responsibility for repair costs, even during the warranty period, if the malfunction is due to:

• Wait 10 min. after power is turned off, before opening the covers.

(d) Maintenance

• Please do not carry out except being written to a maintenance descriptions. When these procedures are needed, please contact nearest YOKOGAWA office.

•Care should be taken to prevent the build up of drift, dust or other material on the display glass and name plate. In case of its maintenance, soft and dry cloth is used.

(e) Explosion Protected Type Instrument

•Users of explosion proof instruments should refer first to section 2.1 (Installation of an Explosion Protected Instrument) of this manual.

- Improper and/or inadequate maintenance by the purchaser.

- Failure or damage due to improper handling, use or storage which is out of design conditions.

- Use of the product in question in a location not conforming to the standards specified by Yokogawa, or due to improper maintenance of the installation location.

- Failure or damage due to modification or repair by any party except Yokogawa or an approved representative of Yokogawa.

- Malfunction or damage from improper relocation of the product in question after delivery.

- Reason of force majeure such as fires, earthquakes, storms/floods, thunder/lightening, or other natural disasters, or disturbances, riots, warfare, or radioactive contamination.

1-2

IM 01C22T02-01E

1. INTRODUCTION

1.3 ATEX Documentation

This procedure is only applicable to the countries in European Union.

All instruction manuals for ATEX Ex related products are available in English, German and French. Should you require Ex related instructions in your local language, you are to contact your nearest Yokogawa office or representative.

Alle brugervejledninger for produkter relateret til ATEX Ex er tilgængelige på engelsk, tysk og fransk. Skulle De ønske yderligere oplysninger om håndtering af Ex produkter på eget sprog, kan De rette henvendelse herom til den nærmeste Yokogawa afdeling eller forhandler.

Tutti i manuali operativi di prodotti ATEX contrassegnati con Ex sono disponibili in inglese, tedesco e francese. Se si desidera ricevere i manuali operativi di prodotti Ex in lingua locale, mettersi in contatto con l’ufficio Yokogawa più vicino o con un rappresentante.

Todos los manuales de instrucciones para los productos antiexplosivos de ATEX están disponibles en inglés, alemán y francés. Si desea solicitar las instrucciones de estos artículos antiexplosivos en su idioma local, deberá ponerse en contacto con la oficina o el representante de Yokogawa más cercano.

Kaikkien ATEX Ex -tyyppisten tuotteiden käyttöhjeet ovat saatavilla englannin-, saksan- ja ranskankielisinä. Mikäli tarvitsette Ex -tyyppisten tuotteiden ohjeita omalla paikallisella kielellännne, ottakaa yhteyttä lähimpään Yokogawa-toimistoon tai -edustajaan.

Todos os manuais de instruções referentes aos produtos Ex da ATEX estão disponíveis em Inglês, Alemão e Francês. Se necessitar de instruções na sua língua relacionadas com produtos Ex, deverá entrar em contacto com a delegação mais próxima ou com um representante da Yokogawa.

Tous les manuels d’instruction des produits ATEX Ex sont disponibles en langue anglaise, allemande et française. Si vous nécessitez des instructions relatives aux produits Ex dans votre langue, veuillez bien contacter votre représentant Yokogawa le plus proche.

Alle Betriebsanleitungen für ATEX Ex bezogene Produkte stehen in den Sprachen Englisch, Deutsch und Französisch zur Verfügung. Sollten Sie die Betriebsanleitungen für Ex-Produkte in Ihrer Landessprache benötigen, setzen Sie sich bitte mit Ihrem örtlichen Yokogawa-Vertreter in Verbindung.

Alla instruktionsböcker för ATEX Ex (explosionssäkra) produkter är tillgängliga på engelska, tyska och franska. Om Ni behöver instruktioner för dessa explosionssäkra produkter på annat språk, skall Ni kontakta närmaste Yokogawakontor eller representant.

Alle handleidingen voor producten die te maken hebben met ATEX explosiebeveiliging (Ex) zijn verkrijgbaar in het Engels, Duits en Frans. Neem, indien u aanwijzingen op het gebied van explosiebeveiliging nodig hebt in uw eigen taal, contact op met de dichtstbijzijnde vestiging van Yokogawa of met een vertegenwoordiger.

       ATEX Ex   ,   .        Ex           Yokogawa   .

1-3

IM 01C22T02-01E

1. INTRODUCTION

SLO

EST

1-4

IM 01C22T02-01E

2. HANDLING CAUTION

2.1 Installation of an ExplosionProtected Instrument

If a customer makes a repair or modification to an intrinsically safe or explosionproof instrument and the instrument is not restored to its original condition, its intrinsically safe or explosionproof construction may be compromised and the instrument may be hazardous to operate. Please contact Yokogawa before making any repair or modification to an instrument.

CAUTION

This instrument has been tested and certified as being intrinsically safe or explosionproof. Please note that severe restrictions apply to this instrument’s construction, installation, external wiring, maintenance and repair. A failure to abide by these restrictions could make the instrument a hazard to operate.

WARNING

Maintaining the safety of explosionproof equipment requires great care during mounting, wiring, and piping. Safety requirements also place restrictions on maintenance and repair. Please read the following sections very carefully.

WARNING

The range setting switch must not be used in a hazardous area.

2.1.1 FM approval

a. FM Explosionproof Type

Caution for FM Explosionproof type Note 1. EJA Series differential, gauge, and absolute

pressure transmitters with optional code /FF15 are applicable for use in hazardous locations:

• Applicable standard: FM3600, FM3615, FM3810, ANSI/NEMA250

• Explosionproof for Class I, Division 1, Groups B, C and D.

•Dust-ignitionproof for Class II/III, Division 1, Groups E, F and G.

•Outdoor hazardous locations, NEMA 4X.

• Temperature Class: T6

• Ambient Temperature: –40 to 60°C

• Supply Voltage: 32V dc max.

• Current Draw: 16.5 mA dc

Note 2. Wiring

• All wiring shall comply with National Electrical Code ANSI/NEPA70 and Local Electrical Codes.

•When installed in Division 1, “FACTORY SEALED, CONDUIT SEAL NOT REQUIRED.”

Note 3. Operation

•Keep strictly the “CAUTION” on the nameplate attached on the transmitter. CAUTION: OPEN CIRCUIT BEFORE

REMOVING COVER. “FACTORY SEALED, CONDUIT SEAL NOT REQUIRED.” INSTALL IN ACCORDANCE WITH THE INSTRUCTION MANUAL IM 1C22.

• Take care not to generate mechanical sparking when accessing the instrument and peripheral devices in a hazardous location.

Note 4. Maintenance and Repair

• The instrument modification or parts replacement by other than authorized representative of Yokogawa Electric Corporation is prohibited and will void Factory Mutual Explosionproof Approval.

2-1

IM 01C22T02-01E

2. HANDLING CAUTION

b. FM Intrinsically Safe Type

EJA Series differential, gauge, and absolute pressure transmitters with optional code /FS15.

• Applicable standard: FM3600, FM3610, FM3611, FM3810, ANSI/NEMA250

• FM Intrinsically Safe Approval [Entity Model] Class I, II & III, Division 1, Groups A, B, C, D, E, F & G, Temperature Class T4 Ta=60°C, Type 4X and Class I, Zone 0, AEx ia IIC, Temperature Class T4 Ta=60°C, Type 4X [FISCO Model] Class I, II & III, Division 1, Groups A, B, C, D, E, F & G, Temperature Class T4 Ta=60°C, Type 4X and Class I, Zone 0, AEx ia IIC, Temperature Class T4 Ta=60°C, Type 4X

• Nonincendive Approval Class I, Division 2, Groups A, B, C & D Temperature Class T4 Ta=60°C, Type 4X and Class II, Division 2, Groups F & G Temperature Class T4 Ta=60°C, Type 4X and Class I, Zone 2, Group IIC, Temperature Class T4 Ta=60°C, Type 4X and Class III, Division 2, Temperature Class T4 Ta=60°C, Type 4X

• Electrical Connection: 1/2 NPT female

• Caution for FM Intrinsically safe type. (Following contents refer to “DOC. No. IFM018-A12 p.1, p.2, p.3, and p.3-1.”)

 IFM018-A12

 Installation Diagram

(Intrinsically safe, Division 1 Installation)

Terminator



Pressure



Transmitter



Field Instruments





Field Instruments



Hazardous Location

Non-Hazardous Location

Safety Barrier

F0204.EPS

*1: Dust-tight conduit seal must be used when installed

in Class II and Class III environments.

*2: Control equipment connected to the Associated

Apparatus must not use or generate more than 250 Vrms or Vdc.

*3: Installation should be in accordance with ANSI/

ISA RP12/6 “Installation of Intrinsically Safe Systems for Hazardous (Classified) Locations” and the National Electrical Code (ANSI/NFPA 70) Sections 504 and 505.

*4: The configuration of Associated Apparatus must be

Factory Mutual Research Approved under FISCO Concept.

*5: Associated Apparatus manufacturer’s installation

drawing must be followed when installing this equipment.

*6: The EJA100 Series are approved for Class I, Zone

0, applications. If connecting AEx (ib) associated Apparatus or AEx ib I.S. Apparatus to the Zone 2, and is not suitable for Class I, Zone 0 or Class I, Division 1, Hazardous (Classified) Locations.

*7: No revision to drawing without prior Factory

Mutual Research Approval.

*8: Terminator must be FM Approved.

Electrical Data:

• Rating 1 (Entity) For Groups A, B, C, D, E, F, and G or Group IIC Maximum Input Voltage Vmax: 24 V Maximum Input Current Imax: 250 mA Maximum Input Power Pmax: 1.2 W Maximum Internal Capacitance Ci: 3.52 nF Maximum Internal Inductance Li: 0 H

• Rating 2 (FISCO) For Groups A, B, C, D, E, F, and G or Group IIC Maximum Input Voltage Vmax: 17.5 V Maximum Input Current Imax: 360 mA Maximum Input Power Pmax: 2.52 W Maximum Internal Capacitance Ci: 3.52 nF Maximum Internal Inductance Li: 0 H

• Rating 3 (FISCO) For Groups C, D, E, F, and G or Group IIB Maximum Input Voltage Vmax: 17.5 V Maximum Input Current Imax: 380 mA Maximum Input Power Pmax: 5.32 W Maximum Internal Capacitance Ci: 3.52 nF Maximum Internal Inductance Li: 0 H

Note: In the rating 1, the output current of the barrier must be

limited by a resistor “Ra” such that Io=Uo/Ra. In the rating 2 or 3, the output characteristics of the barrier must be the type of trapezoid which are certified as the FISCO model (See “FISCO Rules”). The safety barrier may include a terminator. More than one field instruments may be connected to the power supply line.

2-2

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2. HANDLING CAUTION

 FISCO Rules

The FISCO Concept allows the interconnection of intrinsincally safe apparatus to associated apparatus not specifically examined in such combination. The criterion for such interconnection is that the voltage (Ui), the current (Ii) and the power (Pi) which intrinsically safe apparatus can receive and remain intrinsically safe, considering faults, must be equal or greater than the voltage (Uo, Voc, Vt), the current (Io) and the power (Po) which can be provided by the associated apparatus (supply unit).

Po  Pi, Uo  Ui, Io  Ii In addition, the maximum unprotected residual capacitance (Ci) and inductance (Li) of each apparatus (other than the terminators) connected to the fieldbus must be less than or equal to 5 nF and 10 H respectively.

Ci  5nF, Li  10H In each I.S. fieldbus segment only one active source, normally the associated apparatus, is allowed to provide the necessary power for the fieldbus system. The allowed voltage Uo of the associated apparatus used to supply the bus is limited to the range of 14 V dc to 24 V dc. All other equipment connected to the bus cable has to be passive, meaning that the apparatus is not allowed to provide energy to the system, except to a leakage current of 50 A for each connected device.

Terminators

At each end of the trunk cable an approved line terminator with the following parameters is suitable:

R = 90...102 Ω C = 0...2.2 F

(0.8...1.2 F is required in operation)

The resistor must be infallible according to IEC 60079-

11.

System evaluations

The number of passive device like transmitters, actuators, hand held terminals connected to a single bus segment is not limited due to I.S. reasons. Furthermore, if the above rules are respected, the inductance and capacitance of the cable need not to be considered and will not impair the intrinsic safety of the installation.

SAFE AREAHAZARDOUS AREA

Terminator (FISCO Model)

Ex i

Hand-

held-

Terminal

Supply Unit and Safety Barrier (FISCO Model)

Terminator

Data

Supply unit

Trapezoidal or rectangular output characteristic only

Uo = 14...17.5 V (I.S. maximum value)

Io according to spark test result or other assess-

ment. No specification of Lo and Co is required on

the certificate or label.

Cable

The cable used to interconnect the devices needs to comply with the following parameters:

Loop resistance Rc: 15...150 Ω/km

Inductance per unit length Lc: 0.4...1 mH/km

Capacitance per unit length Cc: 80...200 nF/km

Length of spur cable: max. 30 m (Group IIC and

IIB)

Length of trunk cable: max. 1 km (Group IIC) or 5

km (Group IIB)

Field Instruments

(Passive)

I.S. fieldbus system complying with FISCO model

F0205.EPS

2-3

IM 01C22T02-01E

2. HANDLING CAUTION

 Installation Diagram

(Nonincendive, Division 2 Installation)

Terminator

Non-Hazardous Location

(Nonincendive) Power Supply

FM Approved Associated Nonincendive Field Wiring Apparatus

Vt or Voc It or Isc Ca La

Vmax = 32 V Ci = 3.52 nF Li = 0 H



Pressure



Transmitter



Field Instruments





Field Instruments



Hazardous Location

F0206.EPS

*1: Dust-tight conduit seal must be used when installed

in Class II and Class III environments. *2: Installation should be in accordance with the

National Electrical Code (ANSI/NFPA 70) Sections

504 and 505. *3: The configuration of Associated Nonincendive

Field Wiring Apparatus must be Factory Mutual

Research Approved under FISCO Concept. *4: Associated Nonincendive Field Wiring Apparatus

manufacturer’s installation drawing must be

followed when installing this equipment. *5: No revision to drawing without prior Factory

Mutual Research Approval. *6: Terminator and supply unit must be FM Approved. *7: If use ordinary wirings, the general purpose

equipment must have nonincendive field wiring

terminal approved by FM Approvals. *8: The nonincendive field wiring circuit concept

allows interconection of nonincendive field wiring

apparatus with associated nonincendive field wiring

apparatus, using any of the wiring methods permit-

ted for unclassified locations. *9: Installation requirements;

Vmax  Voc or Vt Imax = see note 10. Ca  Ci + Ccable La  Li + Lcable

*10: For this current controlled circuit, the parameter

(Imax) is not required and need not be aligned with

parameter (Isc or It) of the barrier or associated

nonincendive field wiring apparatus.

Electrical Data:

Maximum Input Voltage Vmax: 32 V Maximum Internal Capacitance Ci: 3.52 nF Maximum Internal Inductance Li: 0 H

c. FM Nonincendive approval

Model EJA Series differential, gauge, and absolute pressure transmitters with optional code /FN15.

•Applicable standard: FM3600, FM3611, FM3810

•Nonincendive Approval Class I, Division 2, Groups A, B, C and D Class II, Division 2, Groups F and G Class III, Division 1 and Class I, Zone 2, Group IIC in Hazardous

(Classified) Locations.

Temperature Class: T4 Ambient Temperature: –40 to 60°C Ambient Humidity: 0 to 100%R.H. (No condensation)

Enclosure: NEMA Type4X

• Electrical Parameters:

Vmax = 32 Vdc Ci = 3.52 nF Li = 0 µH

• Caution for FM Nonincendive type. (Following

contents refer to “DOC. No. NFM012-A08 p.1 and p.2”)

 NFM012-A08

Installation Diagram:

Terminator



Pressure



Transmitter



Field Instruments





Field Instruments



Hazardous Area

Safe Area

Terminator

Supply

F0207.EPS

Note:

1: Dust-tight conduit seal must be used when installed

in Class II and Class III environments.

2-4

IM 01C22T02-01E

2. HANDLING CAUTION

2: Installation should be in accordance with National

Electrical Code (ANSI/NFPA 70) Sections 504, 505 and Local Electrical Code.

3: The configuration of Associated Apparatus must be

Factory Mutual Research Approved.

4: Associated Apparatus manufacturer’s installation

drawing must be followed when installing this equipment.

5: No revision to drawing without prior Factory Mutual

Research Approval. 6: Terminator and supply unit must be FM approved. 7: Installation requirements;

Vmax  Voc or Vt Ca  Ci + Ccable La  Li + Lcable

2.1.2 CSA Certification

Caution for CSA Explosionproof type Note 1. EJA Series differential, gauge, and absolute

pressure transmitter with optional code /CF15 are applicable for use in hazardous locations:

• Applicable standard: C22.2 No.0, No.0.4, No.25, No.30, No.94, No.142, No.1010.1

•Certificate: 1010820

• Explosionproof for Class I, Division 1, Groups B, C and D.

•Dust-ignitionproof for Class II/III, Division 1, Groups E, F and G.

• Encl “Type 4X”

• Temperature Class: T6 T5 T4

• Process Temperature: 85°C 100°C 120°C

• Ambient Temperature: –40 to 80°C

• Supply Voltage: 32 V dc max.

• Current Draw: 16.5 mA dc

Note 2. Wiring

•All wiring shall comply with Canadian Electrical Code Part I and Local Electrical Codes.

• In hazardous location, wiring shall be in conduit as shown in the figure.

•CAUTION: SEAL ALL CONDUITS

WITHIN 50 cm OF THE ENCLOSURE. UN SCELLEMENT DOIT ÊTRE INSTALLÉ À MOINS DE 50 cm DU BÎTIER.

•When installed in Division 2, “SEALS NOT REQUIRED.”

Note 3. Operation

• Keep strictly the “CAUTION” on the label attached on the transmitter.

CAUTION: OPEN CIRCUIT BEFORE

REMOVING COVER. OUVRIR LE CIRCUIT AVANT D´NLEVER LE COUVERCLE.

• Take care not to generate mechanical spark when access to the instrument and peripheral devices in hazardous location.

Note 4. Maintenance and Repair

• The instrument modification or parts replacement by other than authorized representative of Yokogawa Electric Corporation and Yokogawa Corporation of America is prohibited and will void Canadian Standards Explosionproof Certification.

Non-Hazardous

Locations

Non-hazardous Location Equipment

32 V DC Max. 15 mA DC Output current

Non-Hazardous

Locations

Non-hazardous Location Equipment

32 V DC Max. 15 mA DC Output current

Hazardous Locations Division 1

50 cm Max.

Sealing Fitting

Hazardous Locations Division 2

Sealing Fitting

Conduit

EJA Series

F0201.EPS

2.1.3 CENELEC ATEX (KEMA) Certification

(1) Technical Data a. CENELEC ATEX (KEMA) Intrinsically Safe

Type

Caution for CENELEC ATEX (KEMA) Intrinsically safe Type.

Note 1. EJA Series differential, gauge, and absolute

pressure transmitters with optional code /KS25 for potentially explosive atmospheres:

• No. KEMA 02ATEX1344 X

•Applicable standard: EN50014:1997, EN50020:1994, EN50284:1999

• Type of Protection and Marking Code: EEx ia IIC T4

• Temperature Class: T4

• Enclosure: IP67

2-5

IM 01C22T02-01E

2. HANDLING CAUTION

• Process Temperature: 120°C max.

• Ambient Temperature: –40 to 60°C

Note 2. Installation

• All wiring shall comply with local installation requirements. (Refer to the installation diagram)

Note 3. Maintenance and Repair

• The instrument modification or parts replacement by other than authorized representative of Yokogawa Electric Corporation is prohibited and will void KEMA Intrinsically safe Certification.

Note 4. Special Conditions for Safe Use

• In the case where the enclosure of the Pressure Transmitter is made of aluminium, if it is mounted in an area where the use of category 1 G apparatus is required, it must be installed such, that even in the event of rare incidents, ignition sources due to impact and friction sparks are excluded.

 FISCO Model

Non-Hazardous

Locations

Supply Unit and Safety Barrier (FISCO Model)

Terminator

Data

I.S. fieldbus system complying with FISCO

Hazardous Locations

Ex i

Hand-

held-

Terminal

Field Instruments

(Passive)

Terminator (FISCO Model)

F0202.EPS

Supply unit

The supply unit must be certified by a notify body as FISCO model and following trapezoidal or rectangular output characteristic is used.

Uo = 14...17.5 V (I.S. maximum value) Io based on spark test result or other assessment. No specification of Lo and Co is required on the certificate or label.

Cable

The cable used to interconnect the devices needs to comply with the following parameters:

Loop resistance Rc: 15...150 Ω/km

Inductance per unit length Lc: 0.4...1 mH/km

Capacitance per unit length Cc: 80...200 nF/km

Length of spur cable: max. 30 m (IIC and IIB)

Length of trunk cable: max. 1 km (IIC) or 5 km

(EEx ia IIB T4)

Terminators

The terminator must be certified by a Notified body as FISCO model and at each end of the trunk cable an approved line terminator with the following parameters is suitable:

R = 90...102 Ω

C = 0...2.2 F

(0.8...1.2 F is required in operation)

The resistor must be infallible according to IEC 60079-

11. One of the two allowed terminators might already be integrated in the associated apparatus (bus supply unit).

Number of Devices

The number of devices (max. 32) possible on a fieldbus link depends on factors such as the power consumption of each device, the type of cable used, use of repeaters, etc.

The criterion for such interconnection is that the voltage (Ui), the current (Ii) and the power (Pi), which intrinsically safe apparatus can receive, must be equal or greater than the voltage (Uo), the current (Io) and the power (Po) which can be provided by the associated apparatus (supply unit).

Po  Pi, Uo  Ui, Io  Ii In addition, the maximum unprotected residual capacitance (Ci) and inductance (Li) of each apparatus (other than the terminators) connected to the fieldbus line must be equal or less than 5 nF and 10 H respectively.

Ci  5nF, Li  10H

 Entity Model

Non-Hazardous

Locations

Supply Unit and Safety Barrier

Terminator

Data

I.S. fieldbus system complying with Entity model

Hazardous Locations

Ex i

Hand-

held-

Terminal

Field Instruments

(Passive)

2-6

Terminator

F0203.EPS

IM 01C22T02-01E

2. HANDLING CAUTION

I.S. values Power supply-field device:

Po  Pi, Uo  Ui, Io  Ii Calculation of max. allowed cable length:

Ccable  Co - ∑Ci - ∑Ci (Terminator)

Lcable  Lo - ∑Li

Number of Devices

The number of devices (max. 32) possible on a fieldbus link depends on factors such as the power consumption of each device, the type of cable used, use of repeaters, etc.

b. CENELEC ATEX (KEMA) Flameproof Type

Caution for CENELEC (KEMA) Flameproof Type Note 1. EJA Series differential, gauge, and absolute

pressure transmitters with optional code /KF25 for potentially explosive atmospheres:

• No. KEMA 02ATEX2148

•Applicable standard: EN50014:1997, EN50018:2000

• Type of Protection and Marking Code: EEx d IIC T6...T4 Temperature Class: T6 T5 T4 Maximum Process Temperature:

85°C 100°C 120°C

• Ambient Temperature: –40 to 80°C(T5) –40 to 75°C(T4 and T6)

• Enclosure: IP67

Note 2. Electrical Data

• Supply voltage: 32 V dc max. Output current: 15 mA dc

Note 3. Installation

• All wiring shall comply with local installation requirements.

•The cable entry devices shall be of a certified flameproof type, suitable for the conditions of use.

Note 4. Operation

•Keep the “CAUTION” label to the transmitter. CAUTION: AFTER DE-ENERGIZING,

DELAY 10 MINUTES BEFORE OPENING. WHEN THE AMBIENT TEMP.70°C, USE HEAT-RESISTING CABLES90°C.

• Take care not to generate mechanical sparking when accessing the instrument and peripheral devices in a hazardous location.

Note 5. Maintenance and Repair

• The instrument modification or parts replacement by other than authorized representative of Yokogawa Electric Corporation is prohibited and will void KEMA Flameproof Certification.

c. CENELEC ATEX Type of Protection “n”

Model EJA Series differential, gauge, and absolute pressure transmitters with optional code /KN25.

WARNING

When using a power supply not having a nonincendive circuit, please pay attention not to ignite in the surrounding flammable atmosphere. In such a case, we recommend using wiring metal conduit in order to prevent the ignition.

• Applicable standard: EN60079-15:2003, EN60529

•Referential standard: IEC60079-0:1998, IEC6007911:1999

• Type of Protection and Marking Code:

EEx nL IIC T4

• Group: II

•Category: 3G

• Ambient Temperature: –40 to 60°C

• Ambient humidity: 0 to 100%RH (No condensation)

• Enclosure: IP67

Note 1. Electrical Data

Ui = 32 Vdc Ci = 3.52 nF Li = 0 µH

Note 2. Installation

•All wiring shall comply with local installation requirements. (refer to the installation diagram)

2-7

IM 01C22T02-01E

2. HANDLING CAUTION

Note 3. Maintenance and Repair

• The instrument modification or parts replacement by other than authorized representative of Yokogawa Electric Corporation is prohibited and will void Type of Protection “n”.

Terminator

Hazardous Area

Terminator

Vmax = 32 Vdc Ci = 3.52 nF Li = 0 H

 

Transmitter



Field Instruments





Field Instruments



Safe Area

EJA

Pressure

(3) Installation

WARNING

•All wiring shall comply with local installation requirements and the local electrical code.

•There is no need for a conduit seal in Division 1 and Division 2 hazardous locations because this product is sealed at factory.

(4) Operation

WARNING

• OPEN CIRCUIT BEFORE REMOVING COVER. INSTALL IN ACCORDANCE WITH THIS USER’S MANUAL

• Take care not to generate mechanical sparking when accessing the instrument and peripheral devices in a hazardous locations.

(5) Maintenance and Repair

[EEx nL]

Supply Unit

F0208.EPS

(2) Electrical Connection

A mark indicating the electrical connection type is stamped near the electrical connection port. These marks are as follows.

T0201.EPS

Location of the marking

F0200.EPS

WARNING

The instrument modification or parts replacement by other than authorized Representative of Yokogawa Electric Corporation is prohibited and will void the certification.

2-8

IM 01C22T02-01E

2. HANDLING CAUTION

(6) Name Plate



Name plate



Tag plate for intrinsically safe type

KS25



Tag plate for flameproof type

No. KEMA 02ATEX1344 X EEx ia C T4 Ui17.5V Ii360mA Pi2.52W Ci1.76nF Li0 or Ui24.0V Ii250mA Pi1.2W Ci1.76nF Li0

EEx ia B T4 Ui17.5V Ii380mA Pi5.32W Ci1.76nF Li0 ENCLOSURE:IP67 Tamb –40 TO 60

PROCESS TEMP. 120°C

MODEL: Specified model code. STYLE: Style code. SUFFIX: Specified suffix code. SUPPLY: Supply voltage. OUTPUT: Output signal. MWP: Maximum working pressure. CAL RNG: Specified calibration range. DISP MODE: Specified display mode. OUTPUT MODE: Specified output mode. NO.: Serial number and year of production*1.

TOKYO 180-8750 JAPAN:

The manufacturer name and the address*2.

*1: The first digit in the final three numbers of the

serial number appearing after “NO.” on the name plate indicates the year of production. The following is an example of a serial number for a product that was produced in 2001:

12A819857 132

The year 2001

*2: “180-8750” is the zip code for the following

address.

2-9-32 Nakacho, Musashino-shi, Tokyo Japan

F0298.EPS

2.1.4 IECEx Certification

a. IECEx Flameproof Type

Caution for IECEx flameproof type. Note 1. Model EJA Series differential, gauge, and

absolute pressure transmitters with optional code / SF25 are applicable for use in hazardous locations:

• No. IECEx KEM 06.0005

• Applicable Standard: IEC60079-0:2004, IEC60079-1:2003

• Type of Protection and Marking Code: Ex d IIC T6...T4

• Enclosure: IP67

• Maximum Process Temperature: 120°C (T4), 100°C (T5), 85°C (T6)

• Ambient Temperature: –40 to 75°C (T4), –40 to 80°C (T5), –40 to 75°C (T6)

• Supply Voltage: 42 V dc max.

• Output Signal: 4 to 20 mA dc

Note 2. Wiring

• In hazardous locations, the cable entry devices shall be of a certified flameproof type, suitable for the conditions of use and correctly installed.

• Unused apertures shall be closed with suitable flameproof certified blanking elements. (The plug attached is certificated as the flame proof IP67 as a part of this apparatus.)

• In case of ANSI 1/2 NPT plug, ANSI hexagonal wrench should be applied to screw in.

Note 3. Operation

• WARNING:

AFTER DE-ENERGIZING, DELAY 10 MINUTES

BEFORE OPENING.

• WARNING:

WHEN AMBIENT TEMPERATURE ≥ 70°C,

USE THE HEAT-RESISTING CABLES ≥ 90°C.

• Take care not to generate mechanical sparking when accessing to the instrument and peripheral devices in a hazardous location.

Note 4. Maintenance and Repair

• The instrument modification or parts replacement by other than authorized representative of Yokogawa Electric Corporation is prohibited and will void IECEx Certification.

2-9

IM 01C22T02-01E

3. ABOUT FIELDBUS

3.1 Outline

Fieldbus is a bi-directional digital communication protocol for field devices, which offers an advancement in implementation technologies for process control systems and is widely employed by numerous field devices.

EJA Series Fieldbus communication type employs the specification standardized by The Fieldbus Foundation, and provides interoperability between Yokogawa devices and those produced by other manufacturers. Fieldbus comes with software consisting of two AI function blocks, providing the means to implement a flexible instrumentation system.

For information on other features, engineering, design, construction work, startup and maintenance of Fieldbus, refer to “Fieldbus Technical Information” (TI 38K03A01-01E).

3.2 Internal Structure of EJA

The EJA contains two virtual field devices (VFD) that share the following functions.

3.2.1 System/network Management VFD

• Sets node addresses and Phisical Device tags (PD Tag) necessary for communication.

• Controls the execution of function blocks.

•Manages operation parameters and communication resources (Virtual Communication Relationship: VCR).

(4)AI2 function block

• Outputs static pressure signals.

(5)PID function block

• Performs the PID control computation based on the deviation of the measured value from the setpoint.

3.3 Logical Structure of Each

Block

EJA Fieldbus

Sensor

input

Sensor

System/network management VFD

PD Tag

Node address

Link Master (option)

Function block VFD

Transducer

block

Block tag

Parameters

Resource block

Block tag

Parameters

Communication

parameters

VCR

Function block

execution schedule

PID function

block (option)

AI function

block

AI function

block

Block tag

Parameters

OUT

Output

3.2.2 Function Block VFD

(1)Resource block

•Manages the status of EJA hardware.

•Automatically informs the host of any detected faults or other problems.

(2)Transducer block

• Converts sensor output to pressure signals and transfers to AI function block.

(3)AI1 function block

• Conditions raw data from the Transducer block.

• Outputs differential pressure signals.

•Carries out scaling, damping and square root extraction.

Figure 3.1 Logical Structure of Each Block

Setting of various parameters, node addresses, and PD Tags shown in Figure 3.1 is required before starting operation.

3.4 Wiring System Configuration

The number of devices that can be connected to a single bus and the cable length vary depending on system design. When constructing systems, both the basic and overall design must be carefully considered to achieve optimal performance.

3-1

IM 01C22T02-01E

F0301.EPS

4. GETTING STARTED

Fieldbus is fully dependent upon digital communication protocol and differs in operation from conventional 4 to 20 mA transmission and the BRAIN communication protocol. It is recommended that novice users use field devices in accordance with the procedures described in this section. The procedures assume that field devices will be set up on a bench or in an instrument shop.

4.1 Connection of Devices

The following instruments are required for use with Fieldbus devices:

• Power supply:

Fieldbus requires a dedicated power supply. It is recommended that current capacity be well over the total value of the maximum current consumed by all devices (including the host). Conventional DC current cannot be used as is.

• Terminator:

Fieldbus requires two terminators. Refer to the supplier for details of terminators that are attached to the host.

•Field devices:

Connect Fieldbus communication type EJA. Two or more EJA devices or other devices can be connected.

• Host:

Used for accessing field devices. A dedicated host (such as DCS) is used for an instrumentation line while dedicated communication tools are used for experimental purposes. For operation of the host, refer to the instruction manual for each host. No other details on the host are given in this material.

•Cable:

Used for connecting devices. Refer to “Fieldbus Technical Information” (TI 38K03A01-01E) for details of instrumentation cabling. For laboratory or other experimental use, a twisted pair cable two to three meters in length with a cross section of 0.9 mm2 or more and a cycle period of within 5 cm (2 inches) may be used. Termination processing depends on the type of device being deployed. For EJA, use an M4 screw terminal claw. Some hosts require a connector.

Refer to Yokogawa when making arrangements to purchase the recommended equipment.

Connect the devices as shown in Figure 4.1. Connect the terminators at both ends of the trunk, with a minimum length of the spur laid for connection.

The polarity of signal and power must be maintained.

Fieldbus power supply

Terminator

Figure 4.1 Cabling

EJA

HOST

Terminator

F0401.EPS

NOTE

No CHECK terminal is used for Fieldbus communication EJA. Do not connect the field indicator and check meter.

Before using a Fieldbus configuration tool other than the existing host, confirm it does not affect the loop functionality in which all devices are already installed in operation. Disconnect the relevant control loop from the bus if necessary.

IMPORTANT

Connecting a Fieldbus configuration tool to a loop with its existing host may cause communication data scrambling resulting in a functional disorder or a system failure.

4-1

IM 01C22T02-01E

4. GETTING STARTED

4.2 Host Setting

To activate Fieldbus, the following settings are required for the host.

IMPORTANT

Do not turn off the power immediately after setting. When the parameters are saved to the EEPROM, the redundant processing is executed for an improvement of reliability. If the power is turned off within 60 seconds after setting is made, the modified parameters are not saved and the settings may return to the original values.

Table 4.1 Operation Parameters

Symbol Parameter Description and Settings

V (ST)

V (MID)

V (MRD)

V (FUN)

V (NUN)

Slot-Time

Minimum-Inter-PDUDelay

Maximum-ReplyDelay

First-Unpolled-Node

Number-ofconsecutiveUnpolled-Node

Indicates the time necessary for immediate reply of thje device. Unit of time is in octets (256 µs). Set maximum specification for all devices. For EJA, set a value of 4 or greater.

Minimum value of communication data intervals. Unit of time is in octets (256 µs). Set the maximum specification for all devices. For EJA, set a value of 4 or greater.

The worst case time elapsed until a reply is recorded. The unit is Slottime; set the value so that V (MRD) !V (ST) is the maximum value of the specification for all devices. For EJA, the setting must be a value of 12 or greater.

Indicate the address next to the address range used by the host. Set 0x15 or greater.

Unused address range.

T0401.EPS

0x00

Not used

0x0F

0x10 0x13

0x14

V(FUN)

V(FUN)V(NUN)

0xF7 0xF8

0xFB

0xFC

0xFF

Note 1: Bridge device: A linking device which brings data from one

or more H1 networks. Note 2: LM device: with bus control function (Link Master function) Note 3: BASIC device: without bus control function

Figure 4.2 Available Address Range

Bridge device

LM device

Unused V(NUN)

BASIC device

Default address

Portable device address

F0402.EPS

4-2

IM 01C22T02-01E

4. GETTING STARTED

4.3 Bus Power ON

Turn on the power of the host and the bus. Where the EJA is equipped with an LCD indicator, first all segments are lit, then the display begins to operate. If the indicator is not lit, check the polarity of the power supply.

Using the host device display function, check that the EJA is in operation on the bus.

The device information, including PD tag, Node address, and Device ID, is described on the sheet attached to the EJA. The device information is given in duplicate on this sheet.

Device ID : 5945430003XXXXXXXX PD Tag : PT1001 Device Revision : 2 Node Address : 0xf3 Serial No. : XXXXXXXXXXXXXXXXX Physical Location :

Note:

Our Device Description Files and Capabilities Files available at

http://www.yokogawa.com/fi/fieldbus/download.htm (English) or http://www.yokogawa.co.jp/Sensor/fieldbus/download.htm (Japanese)

DEVICE INFORMATION

4.4 Integration of DD

If the host supports DD (Device Description), the DD of the EJA needs to be installed. Check if host has the following directory under its default DD directory.

594543\0003

(594543 is the manufacturer number of Yokogawa Electric Corporation, and 0003 is the EJA device

number, respectively.) If this directory is not found, the DD of EJA has not been included. Create the above directory and copy the DD file (0m0n.ffo,0m0n.sym) (m, n is a numeral) into the directory. If you do not have the DD or capabilities files, you can download them from our web site. Visit the following web site.

http://www.yokogawa.com/fi/fieldbus/download.htm Once the DD is installed in the directory, the name and

attribute of all parameters of the EJA are displayed. Off-line configuration is possible by using capabilities

files.

NOTE

Device ID : 5945430003XXXXXXXX PD Tag : PT1001 Device Revision : 2 Node Address : 0xf3 Serial No. : XXXXXXXXXXXXXXXXX Physical Location :

Note:

Our Device Description Files and Capabilities Files available at

http://www.yokogawa.com/fi/fieldbus/download.htm (English) or http://www.yokogawa.co.jp/Sensor/fieldbus/download.htm (Japanese)

Figure 4.3 Device Information Sheet Attached to EJA

DEVICE INFORMATION

F0403.EPS

If no EJA is detected, check the available address range and the polarity of the power supply. If the node address and PD tag are not specified when ordering, default value is factory set. If two or more EJAs are connected at a time with default value, only one EJA will be detected from the host as EJAs have the same initial address. Separately connect each EJA and set a different address for each.

Ensure to use the suitable file for the device. EJA has two types, one with the standard function blocks and /LC1 with PID/LM function. If the different type CFF is used, some errors may occur at downloading to the device.

4.5 Reading the Parameters

To read EJA parameters, select the AI1 block of the EJA from the host screen and read the OUT parameter. The current selected signal is displayed. Check that MODE_BLK of the function block and resource block is set to AUTO, and change the signal input and read the parameter again. A new designated value should be displayed.

4-3

IM 01C22T02-01E

4.6 Continuous Record of Values

If the host has a function of continuously records the indications, use this function to list the indications (values). Depending on the host being used, it may be necessary to set the schedule of Publish (the function that transmits the indication on a periodic basis).

4.7 Generation of Alarm

If the host is allowed to receive alarms, generation of an alarm can be attempted from EJA. In this case, set the reception of alarms on the host side. The example using EJA differential pressure transmitter is shown below. EJA’s VCR-7 is factory-set for this purpose. For practical purposes, all alarms are placed in a disabled status; for this reason, it is recommended that you first use one of these alarms on a trial basis. Set the value of link object-3 (index 30002) as “0, 299, 0, 6, 0”. Refer to section 5.6.1 Link Object for details.

4. GETTING STARTED

Since the L0_PRI parameter (index 4029) of the AI1 block is set to “0”, try setting this value to “3”. Select the Write function from the host in operation, specify an index or variable name, and write “3” to it.

The L0_LIM parameter (index 4030) of the AI1 block determines the limit at which the lower bound alarm for the process value is given. In usual cases, a very small value is set to this limit. Set 10 (meaning 10 kPa) to the limit. Since the differential pressure is almost 0, a lower bound alarm is raised. Check that the alarm can be received at the host. When the alarm is confirmed, transmission of the alarm is suspended.

The above-mentioned items are a description of the simple procedure to be carried out until EJA is connected to Fieldbus. In order to take full advantage of the performance and functionality of the device, it is recommended that it be read together with Chapter 5, which describes how to use the EJA.

4-4

IM 01C22T02-01E

5. CONFIGURATION

This chapter describes how to adapt the function and performance of the EJA to suit specific applications. Because multiple devices are connected to Fieldbus, it is important to carefully consider the device requirements and settings when configuring the system. The following steps must be taken.

(1)Network design

Determines the devices to be connected to Fieldbus and checks the capacity of the power supply.

(2)Network definition

Determines the tag and node addresses for all devices.

(3)Definition of combining function blocks

Determines how function blocks are combined.

(4)Setting tags and addresses

Sets the PD Tag and node addresses for each device.

(5)Communication setting

Sets the link between communication parameters and function blocks.

(6)Block setting

Sets the parameters for function blocks.

The following section describes in sequece each step of this procedure. The use of a dedicated configuration tool significantly simplifies this procedure. Refer to Appendix 5 when the EJA is used as Link Master.

5.1 Network Design

Select the devices to be connected to the Fieldbus network. The following are essential for the operation of Fieldbus.

• Power supply

• Terminator

Fieldbus requires two terminators. Refer to the supplier for details of terminators that are attached to the host.

•Field devices

Connect the field devices necessary for instrumenta-

tion. EJA has passed the interoperability test

conducted by The Fieldbus Foundation. In order to

properly start Fieldbus, it is recommended that the

devices used satisfy the requirements of the above

test.

• Host

Used for accessing field devices. A minimum of one

device with bus control function is needed.

• Cable

Used for connecting devices. Refer to “Fieldbus

Technical Information” for details of instrumenta-

tion cabling. Provide a cable sufficiently long to

connect all devices. For field branch cabling, use

terminal boards or a connection box as required.

First, check the capacity of the power supply. The power supply capacity must be greater than the sum of the maximum current consumed by all devices to be connected to Fieldbus. The maximum current consumed (power supply voltage 9 V to 32 V) for EJA is

16.5 mA. The cable used for the spur must be of the minimum possible length.

5.2 Network Definition

Before connection of devices with Fieldbus, define the Fieldbus network. Allocate PD Tag and node addresses to all devices (excluding such passive devices as terminators).

The PD Tag is the same as the conventional one used for the device. Up to 32 alphanumeric characters may be used for definition. Use a hyphen as a delimiter as required.

The node address is used to specify devices for communication purposes. Because data is too long for a PD Tag, the host uses the node address in place of the PD Tag for communication. A range of 20 to 247 (or hexadecimal 14 to F7) can be set. The device (LM device) with bus control function (Link Master function) is allocated from a smaller address number (20) side, and other devices (BASIC device) without bus control function allocated from a larger address number (247) side respectively. Place the EJA in the

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5. CONFIGURATION

range of the BASIC device. When the EJA is used as Link Master, place the EJA in the range of LM device. Set the range of addresses to be used to the LM device. Set the following parameters.

Table 5.1 Parameters for Setting Address Range

Symbol

V (FUN) First-Unpolled-Node

V (NUN) Number-of-

Parameters Description

Indicates the address next to the address range used for the host or other LM device.

Unused address range consecutiveUnpolled-Node

T0501.EPS

The devices within the address range written as “Unused” in Figure 5.1 cannot be used on a Fieldbus. For other address ranges, the range is periodically checked to identify when a new device is mounted. Care must be taken to keep the unused device range as narrow as possible so as to lessen the load on the Fieldbus.

0x00

0x0F 0x10

0x13 0x14

V(FUN)

V(FUN)V(NUN)

0xF7 0xF8

0xFB 0xFC

0xFF

Figure 5.1 Available Range of Node Addresses

Not used

Bridge device

LM device

Unused V(NUN)

BASIC device

Default address

Portable device address

F0501.EPS

To ensure stable operation of Fieldbus, determine the operation parameters and set them to the LM devices. While the parameters in Table 5.2 are to be set, the worst-case value of all the devices to be connected to the same Fieldbus must be used. Refer to the specification of each device for details. Table 5.2 lists EJA specification values.

Table 5.2 Operation Parameter Values of the EJA to be

Set to LM Devices

Symbol Parameters Description and Settings

V (ST) Slot-Time

V (MID) Minimum-Inter-PDU-

Delay

V (MRD) Maximum-Response-

Delay

Indicates the time necessary for immediate reply of thje device. Unit of time is in octets (256 µs). Set maximum specification for all devices. For EJA, set a value of 4 or greater.

Minimum value of communication data intervals. Unit of time is in octets (256 µs). Set the maximum specification for all devices. For EJA, set a value of 4 or greater.

T0502.EPS

5.3 Definition of Combining Function Blocks

The input/output parameters for function blocks are combined. For the EJA, two AI blocks output parameter (OUT) and PID block are subject to combination. They are combined with the input of the control block as necessary. Practically, setting is written to the EJA link object with reference to “Block setting” in Section

5.6 for details. It is also possible to read values from

the host at proper intervals instead of connecting the EJA block output to other blocks.

The combined blocks need to be executed synchronously with other blocks on the communications schedule. In this case, change the EJA schedule according to the following table. The values in the table are factory-settings.

Table 5.3 Execution Schedule of the EJA Function Blocks

Index Parameters

269

MACROCYCLE_

(SM)

DURATION

276

FB_START_ENTRY.1

(SM)

277

FB_START_ENTRY.2

(SM)

278

FB_START_ENTRY.3

(SM)

279

FB_START_ENTRY.4

(SM)

Setting (Enclosed is

factory-setting)

Cycle (MACROCYCLE) period of control or measurement. Unit is 1/32 ms. (16000 = 0.5 s)

AI1 block startup time. Elapsed time from the start of MACROCYCLE specified in 1/32 ms. (0 = 0 s)

AI2 block startup time. Elapsed time from the start of MACROCYCLE specified in 1/32 ms. (8000 = 0.25 s)

Not used.

T0503.EPS

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