JUMO DICON 400 User manual

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

5
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 ([phone]
Fax Germany (06 61) 6003-508
abroad ([phone]
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
6
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).

7
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
8
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)

9
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
10
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
t
Datenanfrage
Antwort
t2 t0t1t0
Data request Data request
Response