JUMO DICON 400 Manual de usuario

JDICON 400/500

Universal process controller

JDICON 401/501

Universal profile controller

Universal profile generator

B 70.3570.2

Interface Description

10.99/00371593

Contents

1 Introduction 5

1.1 Preface .......................................................................................................... 5

1.2 Typographical conventions ......................................................................... 6

1.2.1 Warning signs ................................................................................................. 6

1.2.2 Note signs ...................................................................................................... 6

1.2.3 Presentation ................................................................................................... 6

2 Protocol description 7

2.1 Master-slave principle ................................................................................. 7

2.2 Transfer mode (RTU) .................................................................................... 7

2.3 Instrument address ...................................................................................... 8

2.4 Timing of the communication ..................................................................... 8

2.4.1 Timing of a data request .............................................................................. 10

2.4.2 Communication during the internal processing time of the slave ................ 11

2.4.3 Communication during the response time of the slave ............................... 11

2.5 Structure of the data blocks ...................................................................... 11

2.6 Error handling ............................................................................................. 11

2.7 Checksum (CRC16) .................................................................................... 13

2.8 Interface ...................................................................................................... 14

3 Functions 15

3.1 Read n words .............................................................................................. 15

3.2 Write 1 word ................................................................................................ 16

3.3 Write n words .............................................................................................. 17

Contents

4 Data flow 19

5 Address tables 21

5.1 Process data ............................................................................................... 21

5.2 Setpoints ..................................................................................................... 23

5.3 Manual output ............................................................................................. 23

5.4 Controller parameters ................................................................................ 24

5.5 Configuration .............................................................................................. 25

5.6 Limit comparators ...................................................................................... 25

5.7 Analogue inputs .......................................................................................... 27

5.8 Outputs ........................................................................................................ 28

5.9 Ramp and profile program function (only Type 703570/75) .................... 29

5.10 Profile controller (only Type 703580/85) ................................................... 29

5.11 System states (only Type 703580/85) ........................................................ 29

5.12 Mathematics and logic module ................................................................. 31

5.13 Displays ....................................................................................................... 31

5.14 Real-time clock (only Type 703580/85) ..................................................... 31

5.15 Binary/logic functions ................................................................................ 32

5.16 Interface ...................................................................................................... 32

5.17 Program start with start data (only Type 703580/85) .............................. 33

5.18 Operating mode Manual with man. data (only Type 703580/85) ............ 33

5.19 Transmit program (only Type 703580/85) ................................................. 33

5.20 Commands .................................................................................................. 34

5.21 Frequent setpoint programming ............................................................... 35

5.22 Process value via interface ....................................................................... 35

5.23 Instrument identification ........................................................................... 35

5.24 External relay module ................................................................................ 36

5.25 Setting the clock (only Type 703580/85) ................................................... 37

6 Sample program 39

1 Introduction

1.1 Preface

Please read this manual before commissioning the interface. Keep the

manual in a place that is accessible to all users at all times.

Please help us to improve this manual.

Your suggestions will be most welcome.

Phone Germany (06 61) 6003-727

abroad (+49) 661 60 03-0

Fax Germany (06 61) 6003-508

abroad (+49) 661 6003-607

HAll the necessary information for operating the interface is

contained in this manual. If any difficulties should still arise

during start-up, you are asked not to carry out any

manipulations which are not permitted. You could endanger

your rights under the instrument warranty!

Please contact the nearest JUMO office or the main factory.

EWhen returning chassis, assemblies or components, the rules

of EN 100 015 “Protection of electrostatically sensitive

devices” have to be observed. Use only the appropriate ESD

packaging material for transport.

Please note that we cannot be held liable for damages

caused by ESD (electrostatic discharge).

1 Introduction

1.2 Typographical conventions

1.2.1 Warning signs

The signs for Danger and Warning are used in this Manual under the

following conditions:

1.2.2 Note signs

1.2.3 Presentation

VDanger This symbol may be used when there may be danger to

personnel if the instructions are disregarded or not

followed accurately!

Warning This symbol is used when there may be damage to

equipment or data if the instructions are disregarded or

not followed accurately!

EWarning This symbol is used where special care is required when

handling components liable to damage through

electrostatic discharge.

Note This symbol is used when your special attention is

drawn to a remark.

Reference This sign refers to further information in other handbooks,

chapters or sections.

abc1Footnote Footnotes are notes which refer to certain points in the

text. Footnotes consist of two parts:

A marking in the text, and the footnote text.

The markings in the text are arranged as continuous

raised (superscript) numbers. The footnote text (in a

smaller typeface) is placed at the bottom of the text and

starts with a number and a full stop.

0x0010 Hexa-

decimal

no.

A hexadecimal number is identified by being preceded by

“0x” (here 16 decimal).

2 Protocol description

2.1 Master-slave principle

The communication between a PC (master) and an instrument (slave)

using MODbus /Jbus takes place according to the master-slave princi-

ple in the form of a data request/instruction - response.

The master controls the data exchange, the slaves only have response

function. They are identified by their instrument address.

2.2 Transfer mode (RTU)

The transfer mode used is the RTU (Remote Terminal Unit). Data are

transferred in binary format (hexadecimal) with 8 bits. The LSB (least

significant bit) is transferred first. The ASCII operating mode is not sup-

ported.

Data format The data format describes the arrangement of a transferred byte. The

following options are available for the data format:

Master

Slave 1 Slave 2 Slave n

Data word Parity bit Stop bit

1/2 bits

No. of bits

8 bits — 1 9

8 bits even 1 10

8 bits odd 1 10

8 bits — 2 10

8 bits even 2 11

8 bits odd 2 11

2 Protocol description

2.3 Instrument address

The addresses of the slaves can be set from 1to 31. The instrument ad-

dress 0 is reserved.

There are two distinct types of data exchange:

Query Data request/instruction from the master to a slave, via the correspond-

ing address. The slave that is accessed will respond.

Broadcast An instruction from the master to all slaves, via address 0. The slaves in

the system do not respond. For example, a certain setpoint can be

transmitted to all slaves. In this case, the correct acceptance of the val-

ue by the slaves should be checked by a subsequent read-out of the

setpoint.

A data request using instrument address 0 is meaningless.

2.4 Timing of the communication

The start and end of a data block are identified by transmission pauses.

The maximum permitted interval between two consecutive characters is

three times the time for transmitting one character.

The character transmission time (time for transmitting a character) de-

pends on the baud rate and the data format that is used (stop bits and

parity bit).

If the data format has 8 data bits, no parity bit and one stop bit, then:

character transmission time [msec] = 1000 * 9 bits/(baud rate)

For the other data formats:

character transmission time [msec]

= 1000 * (8 bits+parity bit+stop bit(s))/(baud rate)

Procedure

HThe RS422/485 interface can access a maximum of 254

slaves.

Data request from master

transmission time = n characters * 1000 * x bits/(baud rate)

marker for end of data request

3 characters * 1000 * x bits/(baud rate)

processing the data request by the slave (max. 250msec)

Response of slave

transmission time = n characters * 1000 * x bits/(baud rate)

marker for end of response

3 characters * 1000 * x bits/(baud rate)

2 Protocol description

Example Marker for end of data request or end of response for 10/9 bits data for-

mat.

Waiting time = 3 characters * 1000 * 10 bits/(baud rate)

Baud rate [baud] Data format [bit] Waiting time [msec]

19200 11 1.718

10 1.563

91.406

9600 11 3.4375

10 3.125

92.813

4800 11 6.875

10 6.25

95.625

2400 11 13.75

10 12.5

911.25

1200 11 27.5

10 25.0

922.5

2 Protocol description

2.4.1 Timing of a data request

Timing

scheme

A data request runs according to the following timing scheme:

t0End marker = 3 characters

(the time depends on the baud rate)

t1This time depends on the internal processing.

The maximum processing time is 250 msec.

The minimum adjustable response time is required by the RS485 in-

terface of the master, to switch the interface driver over from send

to receive. This parameter is not needed by the RS422 interface.

t2This is the time required by the controller to switch from transmit-

ting back to receiving. The master must wait for this length of time

before making a fresh data request. The time must always be main-

tained, even if the new data request is addressed to a different in-

strument.

RS422 interface: t2= 1msec

RS485 interface: t2= 10msec

HA minimum response time can be set up in the controller, un-

der the menu item “Interface”. At least this preset time

(0 — 500 msec) must elapse before a response can be sent.

If a smaller value is set, then the response time may be longer

than the set value (because the internal processing time is

longer) and the controller will then respond as soon as the in-

ternal processing is completed. If the time is set to 0 msec,

this means that the controller will respond as fast as it can.

DatenanfrageMaster

Slave

Datenanfrage

Antwort

t0t1t0

Data request Data request

Response

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