YOKOGAWA vigilantplant YTA Series User manual

User’s
Manual
Yokogawa Electric Corporation
IM 01C50T02-01E
YTA Series
Temperature Transmitter
Fieldbus Communication
IM 01C50T02-01E
7th Edition

i
CONTENTS
IM 01C50T02-01E
FD No. IM 01C50T02-01E
7th Edition: Nov. 2007(KP)
All Rights Reserved, Copyright © 2000, Yokogawa Electric Corporation
CONTENTS
1. INTRODUCTION............................................................................................1-1
Regarding This Manual............................................................................. 1-1
For Safe Use of Product........................................................................... 1-2
Warranty.................................................................................................... 1-2
ATEX Documentation ............................................................................... 1-3
2. PART NAMES ...............................................................................................2-1
3. ABOUT FIELDBUS .......................................................................................3-1
3.1 Outline ................................................................................................. 3-1
3.2 Internal Structure of YTA .................................................................... 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 .............................................................. 3-2
4. GETTING STARTED .....................................................................................4-1
4.1 Connection of Devices ........................................................................ 4-1
4.2 Host Setting......................................................................................... 4-2
4.3 Bus Power ON .................................................................................... 4-2
4.4 Integration of DD................................................................................. 4-3
4.5 Reading the Parameters ..................................................................... 4-3
4.6 Continuous Record of Values ............................................................. 4-3
4.7 Generation of Alarm............................................................................ 4-3
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................................................................................. 5-5
5.6.3 View Object .................................................................................. 5-6
5.6.4 Parameters of Transducer Block ............................................... 5-12
5.6.5 Parameters of AI Function Block ............................................... 5-14
5.6.6 Parameters of DI Function Block ............................................... 5-15
5.6.7 A setting when Sensor input 2 is not connected ....................... 5-15

ii
CONTENTS
IM 01C50T02-01E
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
6.4 Operation of Integral Indicator ............................................................ 6-2
7. ERRORS AND WARNINGS..........................................................................7-1
7.1 Error and Warning Indications ............................................................ 7-1
7.2 Checking with LCD ............................................................................. 7-1
7.3 Checking with DEVICE_STATUS_1 to _8 of Resource Block........... 7-4
7.4 Precautions on Warnings.................................................................... 7-8
8. HANDLING CAUTION...................................................................................8-1
8.1 Installation of Explosionproof Type Transmitters................................ 8-1
8.1.1 CSA Certification .......................................................................... 8-1
8.1.2 CENELEC ATEX Certification...................................................... 8-2
8.1.3 FM Certification ........................................................................... 8-6
8.1.4 SAA Certification ......................................................................... 8-9
8.1.5 IECEx Certification ....................................................................... 8-9
9. GENERAL SPECIFICATIONS ......................................................................9-1
9.1 Standard Specifications ...................................................................... 9-1
9.2 Optional Specifications........................................................................ 9-2
APPENDIX 1. LIST OF PARAMETERS FOR EACH BLOCK OF THE YTA .. A-1
A1.1 Resource Block ...................................................................................A-1
A1.2 Al Function Block ................................................................................A-3
A1.3 Dl Function Block ................................................................................A-5
A1.4 Transducer Block ................................................................................A-6
A1.5 Unit and Code ...................................................................................A-10
APPENDIX 2. Parameters for Basic Settings, and How to Make and Change
the Settings ............................................................................................... A-11
A2.1 Basic Settings and Corresponding Parameters................................A-11
A2.2 Making and Changing Basic Parameter Settings.............................A-12
A2.3 Setting Up the Transducer Block......................................................A-12
A2.4 Setting Up AI Blocks .........................................................................A-15
A2.5 Setting Up DI Blocks.........................................................................A-16
APPENDIX 3. FUNCTION BLOCK DIAGRAM ............................................... A-18
A3.1 AI Block Function Diagram ...............................................................A-18
A3.2 DI Block Function Diagram ...............................................................A-18

iii
CONTENTS
IM 01C50T02-01E
APPENDIX 4. PID BLOCK .............................................................................. A-19
A4.1 Function Diagram..............................................................................A-19
A4.2 Functions of PID Block .....................................................................A-19
A4.3 Parameters of PID Block ..................................................................A-20
A4.4 PID Computation Details...................................................................A-22
A4.4.1 PV-proportional and -derivative Type PID (I-PD)
Control Algorithm........................................................................A-22
A4.4.2 PID Control Parameters .............................................................A-22
A4.5 Control Output...................................................................................A-22
A4.5.1 Velocity Type Output Action.......................................................A-22
A4.6 Direction of Control Action ................................................................A-22
A4.7 Control Action Bypass.......................................................................A-22
A4.8 Feed-forward .....................................................................................A-22
A4.9 Block Modes......................................................................................A-23
A4.9.1 Mode Transitions.......................................................................A-23
A4.10Bumpless Transfer ............................................................................A-23
A4.11Setpoint Limiters ...............................................................................A-24
A4.11.1 When PID Block Is in Auto Mode ............................................A-24
A4.11.2 When PID Block Is in Cas or RCas Mode...............................A-24
A4.12External-output Tracking ...................................................................A-24
A4.13Measured-value Tracking..................................................................A-24
A4.14Initialization and Manual Fallback (IMan) .........................................A-25
A4.15Manual Fallback ................................................................................A-25
A4.16Auto Fallback ....................................................................................A-25
A4.17Mode Shedding upon Computer Failure...........................................A-25
A4.17.1 SHED_OPT ..............................................................................A-25
A4.18Alarms ...............................................................................................A-26
A4.18.1 Block Alarm (BLOCK_ALM) .....................................................A-26
A4.18.2 Process Alarms ........................................................................A-26
A4.19Example of Block Connections .........................................................A-26
A4.19.1 View Object for PID Function Block.........................................A-27
APPENDIX 5. LINK MASTER FUNCTIONS ................................................... A-29
A5.1 Link Active Scheduler .......................................................................A-29
A5.2 Link Master........................................................................................A-29
A5.3 Transfer of LAS.................................................................................A-30
A5.4 LM Functions.....................................................................................A-31
A5.5 LM Parameters..................................................................................A-32
A5.5.1 LM Parameter List......................................................................A-32
A5.5.2 Descriptions for LM Parameters ................................................A-34
A5.6 FAQs .................................................................................................A-36
REVISION RECORD

Blank Page

IM 01C50T02-01E
1-1
1. INTRODUCTION
1. INTRODUCTION
This manual contains a description of the YTA320
Temperature Transmitter Fieldbus Communication
Type. The Fieldbus communication type is based on
the same dual sensor input features as that of the
BRAIN or HART communication type and is similar to
the BRAIN or HART communication type in terms of
basic performance and operation. This manual de-
scribes only those topics that are required for operation
of the Fieldbus communication type. Refer to the
userⴕs manual “ YTA series Temperature Transmitter
[Hardware]” (IM 01C50B01-01E) for topics common
to other communication types.
Regarding This Manual
•This manual should be passed on to the end user.
•The contents of this manual are subject to change
without prior notice.
•All rights reserved. No part of this manual may be
reproduced in any form without Yokogawa’s written
permission.
•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 instrument.
•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
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.

IM 01C50T02-01E
1-2
1. INTRODUCTION
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 instru-
ment. In case the instrument is handled in contradiction
to these instructions, Yokogawa does not guarantee
safety. Please give your attention to the followings.
(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 the
case reaches a high temperature.
•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.
(c) 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.
(d) Modification
•Yokogawa will not be liable for malfunctions or
damage resulting from any modification made to
this instrument by the customer.
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:
- 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, earth-
quakes, storms/floods, thunder/lightening, or
other natural disasters, or disturbances, riots,
warfare, or radioactive contamination.

IM 01C50T02-01E
1-3
1. INTRODUCTION
ATEX Documentation
This procedure is only applicable to the countries in
European Union.
GB
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.
DK
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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.
I
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.
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Todos los manuales de instrucciones para los productos
antiexplosivos de ATEX están disponibles en inglés,
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estos artículos antiexplosivos en su idioma local,
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NL
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.
SF
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.
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relacionadas com produtos Ex, deverá entrar em
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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.
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Alle Betriebsanleitungen für ATEX Ex bezogene
Produkte stehen in den Sprachen Englisch, Deutsch
und Französisch zur Verfügung. Sollten Sie die
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Landessprache benötigen, setzen Sie sich bitte mit
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produkter är tillgängliga på engelska, tyska och
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explosionssäkra produkter på annat språk, skall Ni
kontakta närmaste Yokogawakontor eller representant.
GR
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       Ex 
     
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IM 01C50T02-01E
1-4
1. INTRODUCTION
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IM 01C50T02-01E
2-1
2. PART NAMES
2. PART NAMES
Refer to the individual instruction manuals for detailed
descriptions of the parts. This section describes the
topics applicable to the Fieldbus communication type.
(1) In the Fieldbus communication type, the
amplifier(CPU) assembly consists of two boards,
as shown in Figure 2.1.
(2) In other communication types, there's the pin
switch which is used for selecting the direction of
hardware burnout at the position of 'SW1' on the
amplifier assembly, while Fieldbus communication
type does not have this pin.
(3) The Fieldbus communication type has a simulation
function. A SIMULATE-ENABLE switch is
mounted at 'SW1' on the amplifier. Refer to
Section 6.3, “Simulation Function” for details of
the simulation function.
Simulation
setting switch
Amplifier Assembly
F0201.EPS
Figure 2.1 Diagram of the Amplifier Assembly

IM 01C50T02-01E
3-1
3. ABOUT FIELDBUS
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.
YTA 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 four AI
function blocks and four DI 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
38K3A01-01E).
3.2 Internal Structure of YTA
The YTA 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).
3.2.2 Function Block VFD
(1)Resource block (RS)
•Manages the status of YTA hardware.
•Automatically informs the host of any detected
faults or other problems.
(2)Transducer block (TR)
•Accepts temperature input from sensors and trans-
fers to AI function block.
•Operates limit swtich calculation and transfers to DI
function block.
(3)AI function block
•Conditions raw data from the Transducer block.
•Outputs temperature signal.
•Carries out scaling, damping and square root
extraction.
(4)DI function block
•Limit switch for temperature.
•Accepts the discrete signal from Transducer block
and Outputs the discrete signal to show if the
temperature exceeds the preset limit.
(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
F0301.EPS
YTA
Fieldbus
System/network management VFD
Function block VFD
Link Master (option)
PD Tag
Sensor
input
Resource block
Block tag
Parameters
PID function
block (option)
Communication
parameters
VCR
Node address
Function block
execution schedule
DI function
block
Output
AI function
block
Block tag
OUT
Parameters
Transducer
block
Block tag
Parameters
Temperature
Sensor
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.

IM 01C50T02-01E
3-2
3. ABOUT FIELDBUS
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 allow device performance to be fully exhibited.

IM 01C50T02-01E
4-1
4. GETTING STARTED
4. GETTING STARTED
Fieldbus is fully dependent upon digital communica-
tion protocol and differs in operation from conven-
tional 4 to 20 mA transmission and the BRAIN or
HART communication protocol. It is recommended
that novice users use field devices in accordance with
the procedures described in this section. The proce-
dures assume that field devices will be set up on a
bench or 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 YTA320.
Two or more YTA320 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
details of the host are explained in the rest of this
material.
•Cable:
Used for connecting devices. Refer to “Fieldbus
Technical Information” (TI 38K3A01-01E) for
details of instrumentation cabling. If the total length
of the cable is in a range of 2 to 3 meters for
laboratory or other experimental use, the following
simplified cable (a twisted pair wire with a cross
section of 0.9 mm2or more and cycle period of
within 5 cm (2 inches) may be used. Termination
processing depends on the type of device being
deployed. For YTA, 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.
YTA320
Fieldbus power
supply
Terminator
Terminator
HOST
F0401.EPS
Figure 4.1 Cabling
NOTE
No CHECK terminal is used for Fieldbus com-
munication YTA. Do not connect the field indica-
tor and check meter. Use the instrument with the
short-bar being installed between (-) terminal
and the CHECK terminal.
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 communi-
cation data scrambles resulting in a functional
disorder or a system failure.

IM 01C50T02-01E
4-2
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
EEPROM, the redundant processing is executed
for the 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
T0401.EPS
Symbol Parameter Description and Settings
V (ST) Slot-Time Set 4 or greater value.
V (MID) Minimum-Inter-PDU-
Delay Set 4 or greater value.
V (MRD) Maximum-Response-
Delay Set so that V (MRD) V
(ST) is 12 or greater
V (FUN) First-Unpolled-Node Indicate the address next
to the address range used
by the host. Set 0x15 or
greater.
V (NUN) Number-of-
consecutive-
Unpolled-Node
Unused address range.
YTA address is factory-set
to 0xF3. Set this address to
be within the range of the
BASIC device in Figure
4.2.
Bridge device
Not used
0x10
0x00
0x14
0xF7
0xF8
0xFB
0xFC
0xFF
V(FUN)
V(FUN)V(NUN)
YTA(0xF3)
LM device
Unused V(NUN)
Note 1: LM device: with bus control function (Link Master function)
Note 2: BASIC device: without bus control function
BASIC device
Default address
Portable device address
F0402.EPS
Figure 4.2 Available Address Range
4.3 Bus Power ON
Turn on the power of the host and the bus. Where the
YTA 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
YTA is in operation on the bus.
The device information, including PD tag, Node
address, and Device ID, is described on the sheet
attached to YTA. The duplicates of device information
are provided on this sheet.
DEVICE INFORMATION
Device ID : 5945430005XXXXXXXX
PD Tag : TT1001
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/fld (English) or
http://www.yokogawa.co.jp/Sensor/fieldbus/download.htm (Japanese)
DEVICE INFORMATION
Device ID : 5945430005XXXXXXXX
PD Tag : TT1001
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/fld (English) or
http://www.yokogawa.co.jp/Sensor/fieldbus/download.htm (Japanese)
F0403.EPS
Figure 4.3 Device Information Sheet Attached to YTA
If no YTA 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 YTAs are
connected at a time with default value, one YTA will
keep the address upon shipment while the other will
have a default address as they have the same initial
addres. Separately connect each YTA and set a
different address for each.

IM 01C50T02-01E
4-3
4. GETTING STARTED
4.4 Integration of DD
If the host supports DD (Device Description), the DD
of the YTA needs to be installed. Check if host has the
following directory under its default DD directory.
594543\0005
(594543 is the manufacturer number of Yokogawa
Electric Corporation, and 0005 is the YTA device
number, respectively.)
If this directory is not found, DD of YTA 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/fld
Once the DD is installed in the directory, the name and
attribute of all parameters of the YTA are displayed.
Off-line configuration is possible by using capabilities
files.
NOTE
Ensure to use the suitable file for the device.
YTA has three types, one with the standard
function blocks, one with /LC1(additional PID
and LAS function) and one with /LC2(additional
2 PIDs and LAS function). If the different type
capabilities file is used, some errors may occur
at downloading to the device.
4.5 Reading the Parameters
To read YTA parameters, select the AI1 block of the
YTA from the host screen and read the OUT param-
eter. The current temperature which is assign to AI1
block is displayed. Sensor 1 input is assigned to AI1
block upon shipment. Check that actual of
MODE_BLOCK of the function block and resource
block is set to Auto, and increase the temperature
measured by Sensor1 and read the parameter again. A
new designated value should be displayed.
4.6 Continuous Record of Values
If the host has a function of continuously recording 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 YTA. In this case, set
the reception of alarms on the host side. YTA’s VCR-6
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, 298, 0, 6, 0”. Refer to
section 5.6.1 Link Object for details.
Since the LO_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 LO_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 the value which is
apparantely higher than expected measured value to the
limit. For example, in case masuering room tempera-
ture of 28C, SET '50(C)' to the limit. Since the
measured temperature is lower than the limit, 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 YTA 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 YTA.

IM 01C50T02-01E
5-1
5. CONFIGURATION
5. CONFIGURATION
This chapter contains information on how to adapt the
function and performance of the YTA to suit specific
applications. Because two or more devices are con-
nected to Fieldbus, settings including the requirements
of all devices need to be determined. Practically, 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 the method for combination between
each function block.
(4)Setting tags and addresses
Sets the PD Tag and node addresses one by one 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 each step of the
procedure in the order given. Using a dedicated
configuration tool allows the procedure to be signifi-
cantly simplified. This section describes the procedure
to be assigned for a host which has relatively simple
functions. Refer to Appendix 5 when the YTA is used
as Link Master.
5.1 Network Design
Select the devices to be connected to the Fieldbus
network. The following instruments are necessary for
operation of Fieldbus.
•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 the field devices necessary for instrumenta-
tion. YTA 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 con-
sumed (power supply voltage 9 V to 32 V) for YTA is
16.6 mA. The cable must have the spur in a minimum
length with terminators installed at both ends of the
trunk.
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 16 to 247

IM 01C50T02-01E
5-2
5. CONFIGURATION
(or hexadecimal 10 to F7) can be set. The device (LM
device) with bus control function (Link Master
function) is allocated from a smaller address number
(16) side, and other devices (BASIC device) without
bus control function allocated from a larger address
number (247) side respectively. Place YTA in the
range of the BASIC device. When the YTA is used as
Link Master, place YTA 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
T0501.EPS
V (FUN) First-Unpolled-Node Indicates the address next
to the address range used
for the host or other LM
device.
V (NUN) Number-of-
consecutive-
Unpolled-Node
Unused address range
Symbol Parameters Description
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 not to allow the address range to
become wider, which can lead to exhaustive consump-
tion of Fieldbus communication performance.
Bridge device
Not used
0x10
0x00
0x14
0xF7
0xF8
0xFB
0xFC
0xFF
V(FUN)
V(FUN)V(NUN)
LM device
Unused V(NUN)
BASIC device
Default address
Portable device address
F0501.EPS
Figure 5.1 Available Range of Node Addresses
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 specifica-
tion of each device for details. Table 5.2 lists YTA
specification values.
Table 5.2 Operation Parameter Values of the YTA to be
Set to LM Devices
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 YTA,
set a value of 4 or greater.
T0502.EPS
Symbol Parameters Description and Settings
V (ST) Slot-Time
V (MID) Minimum-Inter-PDU-
Delay Minimum value of
communication data
intervals. Unit of time is in
octets (256 µs). Set the
maximum specification for
all devices. For YTA, set a
value of 4 or greater.
V (MRD) Maximum-Reply-Delay The worst case time
elapsed until a reply is
recorded. The unit is Slot-
time; set the value so that
V (MRD) V (ST) is the
maximum value of the
specification for all
devices. For YTA, the
setting must be a value of
12 or greater.
5.3 Definition of Combining
Function Blocks
The input/output parameters for function blocks are
combined. For the YTA, four AI blocks output
parameter (OUT), four DI blocks output parameter
(OUT_D) 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 YTA
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
YTA block output to other blocks.
The combined blocks need to be executed synchro-
nously with other blocks on the communications
schedule. In this case, change the YTA schedule
according to the following table. Enclosed values in the
table are factory-settings.
Table 5.3 Execution Schedule of the YTA Function Blocks
T0503.EPS
Index Parameters Setting (Enclosed is
factory-setting)
269
(SM) MACROCYCLE_ DURATION Cycle (MACROCYCLE)
period of control or
measurement. Unit is 1/32
ms. (16000 = 0.5 s)
276
(SM) FB_START_ENTRY.1 AI1 block startup time.
Elapsed time from the start
of MACROCYCLE specified
in 1/32 ms. (0 = 0 s)
277
(SM) FB_START_ENTRY.2
278
to FB_START_ENTRY.3
to
FB_START_ENTRY.10
285
(SM)
AI2 block startup time.
Elapsed time from the start
of MACROCYCLE specified
in 1/32 ms. (4000 = 125ms)
Not used.

IM 01C50T02-01E
5-3
5. CONFIGURATION
A maximum of 50 ms is taken for execution of each
AI block. A maximum of 30 ms is taken for execution
of each DI block, and 100ms for each PID block. For
scheduling of communications for combination with
the next function block, the execution is so arranged as
to start after a lapse of longer than 100 ms. In no case
should function blocks of the YTA be executed at the
same time (execution time is overlapped).
Figure 5.3 shows an example of schedule based on the
loop shown in Figure 5.2.
F0502.EPS
TIC100
TC200
TV200
TT 200
YTA
#2
TT100
YTA
#1
Figure 5.2 Example of Loop Connecting Function Block of
Two YTA with Other Instruments
TT100
TIC100
TC200 TV200
TT200
Function
Block
Schedule
Commu-
nication
Schedule
OUT IN
OUT
CAS_IN BKCAL_OUT
BKCAL_IN
BKCAL_IN
BKCAL_OUT
IN
Unscheduled
Communication
Scheduled
Communication
F0503.EPS
Macrocycle (Control Period)
Figure 5.3 Function Block Schedule and Communication
Schedule
When the control period (macrocycle) is set to more
than 4 seconds, set the following interval to be more
than 1% of the control period.
-Interval between “end of block execution” and “start
of sending CD from LAS”
-Interval between “end of block execution” and “start
of the next block execution”
5.4 Setting of Tags and
Addresses
This section describes the steps in the procedure to set
PD Tags and node addresses in the YTA. There are
three states of Fieldbus devices as shown in Figure 5.4,
and if the state is other than the lowest
SM_OPERATIONAL state, no function block is
executed. YTA must be transferred to this state when
an YTA tag or address is changed.
UNINITIALIZED
(No tag nor address is set)
Tag clear Tag setting
INITIALIZED
(Only tag is set)
SM_OPERATIONAL
(Tag and address are retained, and
the function block can be executed.)
Address clear
F0504.EPS
Address setting
Figure 5.4 Status Transition by Setting PD Tag and Node
Address
YTA has a PD Tag (TT1001) and node address (243,
or hexadecimal 0xF3) that are set upon shipment from
the factory unless otherwise specified. To change only
the node address, clear the address once and then set a
new node address. To set the PD Tag, first clear the
node address and clear the PD Tag, then set the PD
Tag and node address again.
Devices whose node address was cleared will await the
default address (randomly chosen from a range of 248
to 251, or from hexadecimal F8 to FB). At the same
time, it is necessary to specify the device ID in order to
correctly specify the device. The device ID of the YTA
is 5945430005xxxxxxxx. (The xxxxxxxx at the end of
the above device ID is a total of 8 alphanumeric
characters.)

IM 01C50T02-01E
5-4
5. CONFIGURATION
5.5 Communication Setting
To set the communication function, it is necessary to
change the database residing in SM-VFD.
5.5.1 VCR Setting
Set VCR (Virtual Communication Relationship), which
specifies the called party for communication and
resources. YTA has 30 VCRs whose application can be
changed, except for the first VCR, which is used for
management.
YTA has VCRs of four types:
Server(QUB) VCR
A Server responds to requests from a host. This
communication needs data exchange. This type of
communication is called QUB (Queued User-
triggered Bidirectional) VCR.
Source (QUU) VCR
A Source multicasts alarms or trends to other
devices. This type of communication is called QUU
(Queued User-triggered Unidirectional) VCR.
Publisher (BNU) VCR
A Publisher multicasts AI block and DI block output
to another function block(s). This type of communi-
cation is called BNU (Buffered Network-triggered
Unidirectional) VCR.
Subscriber (BNU) VCR
A Subscriber receives output of another function
block(s) by PID block.
A Server VCR is capable to respond to requests from a
Client (QUB) VCR after the Client initiates connection
to the Server successfully. A Source VCR transmits
data without established connection. A Sink (QUU)
VCR on another device can receive it if the Sink is
configured so. A Publisher VCR transmits data when
LAS requests so. An explicit connection is established
from Subscriber (BNU) VCR(s) so that a Subscriber
knows the format of published data.
Each VCR has the parameters listed in Table 5.4.
Parameters must be changed together for each VCR
because modification for each parameter may cause
inconsistent operation.
Table 5.4 VCR Static Entry
T0504-1.EPS
Sub-
index Parameter Description
1FasArTypeAndRole Indicates the type and role of
communication (VCR). The
following 4 types are used
for YTA.
0x32: Server (Responds to
requests from host.)
0x44: Source (Transmits
alarm or trend.)
0x66: Publisher (Sends AI
block output to other
blocks.)
0x76: Subscriber (Receives
output of other blocks
by PID block.)
2FasDllLocalAddr Sets the local address to
specify VCR in YTA. A range
of 20 to F7 in hexadecimal.
3FasDllConfigured
RemoteAddr Sets the node address of the
called party for
communication and the
address (DLSAP or DLCEP)
used to specify VCR in that
address. For DLSAP or
DLCEP, a range of 20 to F7
in hexadecimal is used.
Addresses in Subindex 2
and 3 need to be set to the
same contents of the VCR
as the called party (local and
remote are reversed).
4FasDllSDAP Specifies the quality of
communication. Usually, one
of the following types is set.
0x2B: Server
0x01: Source (Alert)
0x03: Source (Trend)
0x91: Publisher/Subscriber
5FasDllMaxConfirm
DelayOnConnect To establish connection for
communication, a maximum
wait time for the called
party's response is set in
ms. Typical value is 60
seconds (60000).
6FasDllMaxConfirm
DelayOnData For request of data, a
maximum wait time for the
called party's response is
set in ms. Typical value is
60 seconds (60000).
7FasDllMaxDlsduSize Specifies maximum DL
Service Data unit Size
(DLSDU). Set 256 for Server
and Trend VCR, and 64 for
other VCRs.
8FasDllResidual
ActivitySupported Specifies whether
connection is monitored. Set
TRUE (0xff) for Server. This
parameter is not used for
other communication.
9FasDllTimelinessClass Not used for YTA.
10 FasDllPublisherTime
WindowSize Not used for YTA.
11 FasDllPublisher
SynchronizaingDlcep Not used for YTA.

IM 01C50T02-01E
5-5
5. CONFIGURATION
T0504-2.EPS
13 FasDllSubscriber
SynchronizationDlcep Not used for YTA.
14 FmsVfdId Sets VFD for YTA to be
used.
0x1: System/network
management VFD
0x1234: Function block
VFD
15 FmsMaxOutstanding
ServiceCalling Set 0 to Server. It is not
used for other applications.
16 FmsMaxOutstanding
ServiceCalled Set 1 to Server. It is not
used for other applications.
17 FmsFeatures
Supported Indicates the type of
services in the application
layer. In the YTA, it is
automatically set according
to specific applications.
Sub-
index Parameter Description
12 FasDllSubsriberTime
WindowSize Not used for YTA.
30 VCRs are factory-set as shown in the table below.
Table 5.5 VCR List
T0505.EPS
Index
(SM) VCR
Number Factory Setting
293 For system management (Fixed)1
294 Server (LocalAddr = 0xF3)2
295 Server (LocalAddr = 0xF4)3
296 Server (LocalAddr = 0xF7)4
297 Trend Source (LocalAddr = 0x07,
Remote Address=0x111)
5
298 6
299
Alert Source (LocalAddr = 0x07,
Remote Address=0x110)
7 to 30
322
to Not used.
5.5.2 Function Block Execution Control
According to the instructions given in Section 5.3, set
the execution cycle of the function blocks and schedule
of execution.
5.6 Block Setting
Set the parameter for function block VFD.
5.6.1 Link Object
Link object combines the data voluntarily sent by the
function block with VCR. YTA has 26 link objects. A
single link object specifies one combination. Each link
object has the parameters listed in Table 5.6.
Parameters must be changed together for each VCR
because the modifications made to each parameter may
cause inconsistent operation.
Table 5.6 Link Object Parameters
T0506.EPS
Sub-
index Parameters Description
1LocalIndex Sets the index of function
block parameters to be
combined; set “0” for Trend
and Alert.
2VcrNumber Sets the index of VCR to
be combined. If set to “0”,
this link object is not used.
3RemoteIndex Not used in YTA.Set to “0”.
5StaleCountLimit Set the maximum number
of consecutive stale input
values which may be
received before the input
status is set to BAD. To
avoid the unnecessary
mode transition caused
when the data is not
correctly received by
subscriber, set this
parameter to “2” or more.
4ServiceOperation Set one of the following.
Set only one each for link
object for Alert or Trend.
0: Undefined
2: Publisher
3: Subscriber
6: Alert
7: Trend
26 Link objects are not factory-set.
5.6.2 Trend Object
It is possible to set the parameter so that the function
block automatically transmits Trend. YTA has ten
Trend objects, six of which are used for Trend in
analog mode parameters and four is used for Trend in
discrete mode parameter. A single Trend object
specifies the trend of one parameter.
Each Trend object has the parameters listed in Table
5.8. The first four parameters are the items to be set.