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This document is property of Enelpower / Fisia Italimpianti Consortium and it can not be reproduced in any part without written authorisation of the Consortium.

A 1.1 exact name of modbus protocol; 3.1 prefered standars 18.Jan.01 IN

REV. CHANGES DESCRIPTION DATE DRAWNTECHNICAL

INTERFACESCHECKED APPROVED IS

CLIENT

DUBAI ELECTRICITY & WATER AUTHORITY

JOB

JEBEL ALI POWER AND DESALINATION

STATION K - PHASE II

ENGINEER

FICHTNER

Consulting EngineersCONTRACTOR

CONSORTIUM

SYSTEM DWG TYPE DISC.CONTRACTLOT

LOT A & B

CONTRACT JOB Nr.

CNE/100

CONTRACTOR DWG Nr.

M12DW 05734 VVH D M A

The Contractor declare that this submission is in accordance with the requirements of the Contract.

TITLE

Concept for Serial Data Link

between DCS (TELEPERM XP)

and Auxiliary I&C Packages

FIRST ISSUE NAME DATE

DRAWN Berberich 17. Jan. 2001SIZE SCALE SHEETS OF

CHECKEDKoblischek 17. Jan. 2001

APPROVED Wood 17. Jan. 2001A4 1 16

Drawing Number CNE/100 / U / 66 / K / T / 27808REVISION

AISSUE

SCOPE

IN

EnelpowerEnel Group

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Rev. A on 17.Jan.01ssss

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This document is property of Enelpower / Fisia Italimpianti Consortium and it can not be reproduced in any part without written authorisation of the Consortium.Q:\JEBELK2ENEL\00_Concepts\00_Common\27808_Seriell Communication\27808_Seriell_Communication.doc

1. Specification for Serial Data Communication ........................................................... ................................................. 3

1.1 Basis ........................................................... ............................................................ ........................................................ 3

1.2 Organisation ................................................. ........................................................ ......................................................... 4

2. Technical Data of Auxiliary I&C System.............................................................. ............................................................. 5

2.1 General................................................................. ......................................................... ................................................. 5

2.2 Data Format............................... ........................................................ ......................................................... ................... 5

2.3 Communication Protocol ...............................................................................................................................................5

3. Data Format of Analog and Binary Signals................................................... .......................................................... .......... 8

3.1 Structure of Analog Signals .............................................. .............................................. ............................................... 8

3.1.1 Version A1 .............................................................................................................................................................8

3.1.2 Version A2 .............................................................................................................................................................8

3.1.3 Version A3 .............................................................................................................................................................9

3.1.4 Version A4 ...........................................................................................................................................................10

3.1.5 other format (than the above 4 versions)..............................................................................................................11

3.2 Standardisation and Conversion of analog values ......................................................................................................13

3.3 Structure of Binary Signals ..........................................................................................................................................14

3.3.1 Version B1 ...........................................................................................................................................................14

3.3.2 Version B2 ...........................................................................................................................................................14

3.3.3 Version B3 ...........................................................................................................................................................15

3.3.4 other format (than the above 3 versions)..............................................................................................................15

4. Example of Communication I/O-listing........................................................................ .................................................... 16

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1. Specification for Serial Data Communication

1.1 Basis

The Serial Data Link between TELEPERM XP from Siemens for DCS and the connected Auxiliary I&C Packagemust be defined unequivocal. The Protocol of this master-slave communication will be Gould MODBUS Protocol,revision B / RTU-format and the master will be the TELEPERM XP Communication Gateway. Signals coming fromthe Auxiliary I&C Package will be time stamped by the TELEPERM Gateway CM488.

The following pages show the possible connection alternatives.

The relevant data for each connected Auxiliary I&C Package must be inserted in this

document and returned to Siemens.

Auxiliary I&C System

converterconnector

DCS Gateway

converter converter

/isolatorRS232 (V24)connector connector

cable

supplied by Siemenssupplied by others

T

E

L

E

P

E

R

M

X

P

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1.2 Organisation

contact person of Auxiliary I&C System

company : ......................................................................................

name : ......................................................................................

address : ......................................................................................

......................................................................................

......................................................................................

......................................................................................

......................................................................................

email : ......................................................................................

telephone : ......................................................................................

FAX : ......................................................................................

contact person of TELEPERM XP Communication Gateway CM488

SIEMENSPG LFP PMr. Holger Berberich76181 KarlsruheGermany

email: [email protected]: +49 - (0)721 / 595 - 6027FAX: +49 (0)721 / 595 8110

Tools: Microsoft WORD 97, MS EXCEL 97, MS ACCESS 97

Siemens AG

Mr. Matthias Janssen

I&S IT PS Erl 36

Projects & Project Management

Werner-von-Siemens-Str. 60

91052 Erlangen

Germany

[email protected]

+49 (0) 9131 7-43288

+ 49 (0) 9131 7-43331

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2. Technical Data of Auxiliary I&C System

2.1 General

manufacturer

automation system

number of necessary interfaces

number of Serial Data Link -signals

from DCS to Auxiliary I&C System

number of Serial Data Link -signals

from Auxiliary I&C System to DCS

redundancy of interface

physical layerRS 232 (V24 or TTY)RS 422 orRS485

type of communication cable(twisted pair or fiber optic)

2.2 Data Format

baud rate(38400, 19200, 9600, 4800, 2400)

number of data bits

parity, (no, even, odd)

start bit

stop bits (1, 1.5, 2)

2.3 Communication Protocol

The communication protocol will be Modbus-RTU and the following function codes will be supported:

function description Code

Read Coil Status reading Bits 01

Read Input Status reading Bits out of the I/O 02

Read Holding Register reading register 03

Read Analog Input reading register out of the I/O 04

Force Single Coil writing a Bit 05

Preset Single Register writing a register 06

Force Multiple Coils writing several Bits 15

Preset Multiple Register writing several register 16

Siemens

S7-400H

1

0

408

no

RS232 V24

FO

9600

8

even

0

1

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The converter at the TELEPERM XP Communication Gateway will be from PHOENIX Contact GmbH&Co.

Order address:PHOENIX Contact GmbH&CoFlachsmarktstr. 8-2832825 BlombergGermany

Telephone: +49 (0)5235 / 3 00FAX: +49 (0)5235 / 3 41200

The picture shows two PHOENIX converters:

Stromversorgung

24 V DC

sub D connector for

interface cable

screw connector for

interface cable

(alternative)

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Dependent on the cable length there will be used a converter type with the following features:

RS 232full duplex, peer to peer,

length < 15m (V24),

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3. Data Format of Analog and Binary Signals

3.1 Structure of Analog Signals

A: analog valueS: sign

The versions A1 and A2 are the preferred standards.

3.1.1 Version A1

Analog value with a sign.The negative value will be shown as twos complement.

Example for converting typical negative values:

-1 0xFFFF-2 0xFFFE-4096 0xF000-8192 0xE000-16383 0xC001-32768 0x8000

Range 32768 up to +32768

3.1.2 Version A2

Analog value without a sign

Range 0 bis 65536

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

S A A A A A A A A A A A A A A A

Bit position

signed 16-Bit integer

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

A A A A A A A A A A A A A A A A

Bit position

unsigned 16-Bit Integer

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3.1.3 Version A3

32 Bit analog value

The 32 Bits are divided into two words of the modbus protocol.The sequence of the Bytes is usually

1 LOW-Word high Byte2 LOW-Word low Byte3 HIGH-Word high Byte4 HIGH-Word low Byte

The Auxiliary I&C System has the usually sequence of the Bytes

1 :

2 :3 :

The Auxiliary I&C System hasthe specially sequence of the

Bytes

4 :

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

A A A A A A A A A A A A A A A

Bit position

LOW-Word 32-Bit

A A A A A A A A A A A A A A A A

HIGH-Word 32-Bit

A

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3.1.4 Version A4

S: signM: mantissaE: exponent

Analog value in IEEE format:

The Auxiliary I&C System has the following sequence of the Bytes:

1 ...........................................

2 ...........................................

3 ...........................................4 ...........................................

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

M15 M14 M13 M12 M10 M9 M8 M7 M6 M5 M4 M3 M2 M1 M0

Bit position

LOW-Word 32-Bit

V E7 E6 E5 E4 E3 E2 E1 E0 M22 M21 M20 M19 M18 M17 M16

HIGH-Word 32-Bit

M11

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3.1.5 other format (than the above 4 versions)

The format of Auxiliary I&C System has none of the above described versions. The format of the Auxiliary I&CSystem is:

Used Bits for analog value (16/32/64): ................................

The analog value has a sign (yes/no): ................................

Format: ................................

16 Bit analog value:

32 Bit analog value

The Auxiliary I&C System has the following sequence of the Bytes:

1 ...........................................

2 ...........................................

3 ...........................................

4 ...........................................

unsigned 16-Bit Integer

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Bit position

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Bit position

LOW-Word 32-Bit

HIGH-Word 32-Bit

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64 Bit Analogwerte:

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3.2 Standardisation and Conversion of analog values

The communicated values must have defined lower and upper range values which are related to the physical upperand lower range values.The following picture shows the coherence between the modbus value and the physically value.

The calculation is done by the formula:

upper range value -- lower range valuevalue (in TXP) = ---------------------------------------------------------------------- * ( value(modbus) lower range v.(Modbus) ) + lower range value

upper range v.(modbus) -- lower range v.(Modbus)

lower rangevalue

upper rangevalue

modbus valuelower rangevalue on themodbus

upper rangevalue on themodbus

physicallyvalue

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3.3 Structure of Binary Signals

B: binary value

3.3.1 Version B1

The register contains 16 Bit.Every Bit represents a binary value.

3.3.2 Version B2

Example of a field equipment which sends all necessary data including diagnostics internal of one register has thefollowing coding:

F: faultI: interlock

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

B B B B B B B B B B B B B B B B

Bit position

16 Binrwerte

every Bit represents a signal

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

F I B B

Bit position

coded register

1 Coded Binary value

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3.3.3 Version B3

Very often this format is used for feed back signals of drives.The example shows 4 drives with feed back for ON and OFF internal of one register.

3.3.4 other format (than the above 3 versions)

The format of Auxiliary I&C System has none of the above described versions. The format of the Auxiliary I&CSystem is:

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

B B B B B B B B

Bit position

Kodierter Wert 4 Kodierter Wert 3 Kodierter Wert 2Kodierter Wert 1

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Bit position

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4. Example of Communication I/O-listing

A serial interface signal list must include, as a minimum, the following information :

KKS

Signal definition

Description (max. 20 characters)

Setting (max. 8 characters)

Signal type (BI, BO, AI, AO)

Digital alarm class (A, W, T, F, ...)

Analog measuring range (lower and upper range value)

Unit

Modbus range Modbus Adress (Register)

Bit position (with binary signals)

Function code (modbus) for the reading and writing of analog and digital signals

If available: Functional area, functional code, signal standard plan (typical), slave address of the Auxiliary I&CSystem.

KKS signal description setting signaltype

digitalalarmclass

lowerrangevalue

upperrangevalue

unitmodbusrange

modbusaddress

register[HEX]

BIT[HEX]

typical

20CGB10EA011 XM41 GEN CUR I1 FAULT DO F 40343.0 0157 0000 ga002

20CGB10EA011 XQ01 GEN CUR I1 AO 0 3000 A 0...1000040461. 01CD 0000 ga00220CGB10EA011 XH01 GEN CUR I1 >HIGH DO A 40343.1 0157 0001 ga002

20CBG10EA014 XQ01 GEN V I1-I2 AO 0 13.2 kV 0...1000040464. 01D0 0000 ga002

20CBG10EA014 XH01 GEN V I1-I2 >HIGH DO A 40343.7 0157 0007 ga002

20CBG10EA014 XM41 GEN V I1-I2 FAULT DO F 40343.6 0157 0006 ga002

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