Bronkhorst PROFIBUS-DP slave interface User Manual

Instruction manual

PROFIBUS DP® slave interface

for digital multibus

Mass Flow / Pressure instruments

Doc. no.: 9.17.025Q Date: 15-10- 2014

ATTENTION

Please read this instruction manual carefully before installing and operating the instrument.

Not following the guidelines could result in personal injury and/or damage to the equipment.

Head Office: Nijverheidsstraat 1a, NL-7261 AK Ruurlo, The Netherlands, Tel. [phone], [e-mail]

BRONKHORST®

Disclaimer

Even though care has been taken in the preparation and publication of the contents of this manual, we do not assume
legal or other liability for any inaccuracy, mistake, mis-statement or any other error of whatsoever nature contained
herein. The material in this manual is for information purposes only, and is subject to change without notice.

Bronkhorst High-Tech B.V.
July 2011

Symbols

Important information. Discarding this information could cause injuries to people or damage to the
Instrument or installation.

Helpful information. This information will facilitate the use of this instrument.

Additional info available on the internet or from your local sales representative.

Warranty

The products of Bronkhorst High-Tech B.V. are warranteed against defects in material and workmanship for a period
of three years from the date of shipment, provided they are used in accordance with the ordering specifications
and the instructions in this manual and that they are not subjected to abuse, physical damage or
contamination. Products that do not operate properly during this period may be repaired or replaced at no charge.
Repairs are normally warranted for one year or the balance of the original warranty, whichever is the longer.

See also paragraph 9 of the Conditions of sales:

http://www.bronkhorst.com/files/corporate_headquarters/sales_conditions/en_general_terms_of_sales.pdf

The warranty includes all initial and latent defects, random failures, and undeterminable internal causes.

It excludes failures and damage caused by the customer, such as contamination, improper electrical hook-up, physical
shock etc.

Re-conditioning of products primarily returned for warranty service that is partly or wholly judged non-warranty may
be charged for.

Bronkhorst High-Tech B.V. or affiliated company prepays outgoing freight charges when any party of the service is
performed under warranty, unless otherwise agreed upon beforehand. However, if the product has been returned
collect to our factory or service center, these costs are added to the repair invoice. Import and/or export charges,
foreign shipping methods/carriers are paid for by the customer.

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Table of contents

1 GENERAL PRODUCT INFORMATION ................................................................................................. 4

1.1 INTRODUCTION ................................................................................................................................................ 4

1.2 MULTIBUS TYPES .............................................................................................................................................. 4

1.3 REFERENCES TO OTHER APPLICABLE DOCUMENTS ..................................................................................................... 5

1.3.1 Manuals and user guides: ........................................................................................................................... 5

1.3.2 Technical Drawings: .................................................................................................................................... 5

1.3.3 Software tooling: ........................................................................................................................................ 5

1.4 SHORT FORM START-UP ..................................................................................................................................... 6

1.5 OPERATING PRINCIPLES ..................................................................................................................................... 7

2 FIELD BUS INSTALLATION ................................................................................................................. 8

2.1 GENERAL ........................................................................................................................................................ 8

2.2 PROFIBUS CONNECTOR ................................................................................................................................... 8

2.3 PROFIBUS DP CABLES ..................................................................................................................................... 9

2.4 MAXIMAL CABLE LENGTH WITH PROFIBUS DP ...................................................................................................... 9

2.5 SPUR LINES WITH PROFIBUS DP .......................................................................................................................10

2.6 NETWORK TERMINATION ..................................................................................................................................11

3 CONFIGURATION ........................................................................................................................... 12

3.1 GSD-FILE ......................................................................................................................................................12

3.2 CONFIGURATION SOFTWARE ..............................................................................................................................13

3.3 ADD SLAVE TO PROFIBUS DP ..........................................................................................................................14

3.4 SLAVE CONFIGURATION SETTINGS ........................................................................................................................15

3.5 SLAVE PARAMETER SETTINGS .............................................................................................................................16

4 SLAVE ADDRESSING ....................................................................................................................... 17

4.1 GENERAL .......................................................................................................................................................17

4.2 VIA ROTARY SWITCHES ON THE SIDE OF INSTRUMENT (IF PRESENT) ..............................................................................17

4.3 VIA PROFIBUS: ............................................................................................................................................17

4.4 VIA RS232: FLOWFIX ......................................................................................................................................18

4.5 VIA RS232: OTHER PROGRAMS ..........................................................................................................................19

4.6 VIA MICRO-SWITCH AND LED’S ON TOP OF INSTRUMENT ..........................................................................................19

5 DOWNLOAD TO MASTER ............................................................................................................... 20

6 TEST COMMUNICATION................................................................................................................. 21

7 SAFE STATE ................................................................................................................................... 22

8 TROUBLESHOOTING ...................................................................................................................... 23

8.1 LED INDICATION ..............................................................................................................................................23

8.2 TROUBLESHOOTING HINTS AND TIPS ....................................................................................................................24

9 SERVICE ........................................................................................................................................ 25

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BRONKHORST®

More detailed information about PROFIBUS can be
obtained on the website of the (international)

or on

your country (when available).

1 GENERAL PRODUCT INFORMATION

1.1 INTRODUCTION

This manual will explain how to install a Bronkhorst
your PROFIBUS DP system. It only contains information which is
needed most.

PROFIBUS organization: www.profibus.com
the website of the (local) PROFIBUS organization of

1)

Bronkhorst: This includes Bronkhorst High-Tech B.V. , Bronkhorst Cori-Tech B.V. and

M+W Instruments GmbH.

1.2 MULTIBUS TYPES

In 2000 Bronkhorst developed their first digital instruments according to the
“multibus” principle. The basic pc-board on the instrument contained all of
the general functions needed for measurement and control, including
alarm, totalizing and diagnostic functions. It had analog I/O-signals and also
an RS232 connection as a standard feature. In addition to this there is the
possibility of integrating an interface board with DeviceNet™, Profibus-DP
Modbus , FLOW-BUS or EtherCAT protocol. The first generation (MBC-I)
was based on a 16 bit Fujitsu controller. It was superseded in 2003 by the
Multibus type 2 (MBC-II). This version was also based on the 16 bit Fujitsu
controller but it had several improvements to the MBC-I. One of them is the
current steering of the valve. It reduced heat production and improved
control characteristics. The latest version Multibus controller type 3 (MBC3) is introduced in 2011. It is build around a
72MHz 32 bit NXP ARM controller. It has AD and DA controllers on board which makes it possible to measure noise
free and control valves without delays. The internal control loop runs 6 times faster compared to the MBC-II therefore
control stability has improved significantly. It also has several improved functions like reverse voltage protection,
inrush current limitation and overvoltage protection.

MBC3 instruments can be recognised by the “MBC3” placed on lower left side
of the instrument label (see example).

1

instrument to

Example of a Bronkhorst instrument

with PROFIBUS interface

®

,

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RS232 interface with

Bronkhorst High-Tech

Bronkhorst Cori-Tech

Bronkhorst Cori-Tech

Bronkhorst High-Tech

Document 9.17.022

Document 9.17.050

Document 9.17.044

Document 9.17.023

Document 9.17.024

Document 9.17.025

Document 9.17.026

Document 9.17.035

Document 9.17.027

General instructions

Instrument type based

Operational
instructions

Field bus specific

information

Document 9.17.031

M+W Instruments

Document 9.17.063

1.3 REFERENCES TO OTHER APPLICABLE DOCUMENTS

Manuals and guides for digital instruments are modular. General instructions give information about the functioning
and installation of instruments. Operational instructions explain the use of the digital instruments features and
parameters. Field bus specific information explains the installation and use of the field bus installed on the
instrument.

1.3.1 Manuals and user guides:

General instructions digital Mass Flow / Pressure

General instructions CORI-FLOW

General instructions mini CORI-FLOW

General instructions digital LIQUI-FLOW L30

Instruction manual MASS-STREAM D-6300

Operational instructions

for digital multibus

Mass Flow / Pressure

instruments

FLOW-BUS interface

PROFIBUS–DP interface

DeviceNet interface

Modbus interface

FLOW-BUS protocol

EtherCAT interface

1.3.2 Technical Drawings:

Hook-up diagram laboratory-style PROFIBUS (document nr. 9.16.061)
Hook-up diagram industrial style PROFIBUS (document nr. 9.16.053)
Hook-up diagram CORI-FLOW PROFIBUS (document nr. 9.16.049)
Hook-up diagram LIQUI-FLOW L30 digital PROFIBUS (document nr. 9.16.072)

1.3.3 Software tooling:

Flowfix
FlowDDE
GSD file

Page 5 PROFIBUS DP interface 9.17.025

All these documents can be found at:

http://www.bronkhorst.com/en/downloads

BRONKHORST®

START

Master

present

Load GSD

Make sure your master has been installed to the PROFIBUS system

Load GSD-file into the configuration tool. (Software at PROFIBUS master)

Copy bitmaps

Bitmaps (with flow controllers) can be copied in the proper directory (mostly
automatic, sometimes by hand; depends on program)

Add slave to PROFIBUS

system

Select "Bronkhorst meter/controller" and add new instrument to the bus (with
configuration tool)

Set slave configuration

Set parameter data

These settings will be copied to the instrument only at start-up. Examples of
useful parameters are: Fluid number, control mode, se
alarm settings. Setting parameter data is not necessary, but optional.

Set slave station address

Default instruments will be delivered to customers on address 126. This is the
agreed station address for PROFIBUS DP systems for install
to a system. Several methods for setting the stations address can be found in this
manual.

Download configuration

Download all configuration settings into your master

Test data exchange

Test data-exchange communication between your master and the
instrument(s)

Ready

Select wanted modules out of available list with modules. These modules are the
parameters for instruments which are available for cyclic
PROFIBUS DP master. Minimum selection will be probably "measure, integer
(read)" and "setpoint, integer (write)".
your master I/O memory. Inputs and Outputs will be stacked separately in order
of a
E.g.: if you also want to read-back setpoint from PROFIBUS, also select: "setpoint,
integer (read)"

1.4 SHORT FORM START-UP

All necessary settings for this module are already performed at Bronkhorst.
To follow next steps carefully is the quickest way to get this module operational in your own PROFIBUS
environment.

These parameters will be stacked into

ppearance of inserting the modules.

reading/writing by a

tpoint, counter and

ing new instruments

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1.5 OPERATING PRINCIPLES

PROFIBUS DP is a 2-wire industrial data communication standard (Field bus) which allows automation components

like sensors, actuators and controllers to exchange information.

Simple PROFIBUS system.

PROFIBUS DP is a master / slave bus system. Bronkhorst instruments are all slaves. There is no mutual communication
between PROFIBUS DP slaves, only between a master and slave. Each slave must have its own unique station address
on the bus, otherwise there is no communication possible. Setting slave station address can be performed by either:

• Via rotary switches (Non industrial instruments)

• Master configuration software.

For example:

• Sycon V2.6.2. from Hilscher G.m.b.H. (in this manual)

• Step 7 V5.1 from Siemens for PLC type S7-300 2DP.

Most master configuration software tools work in the same way, because PROFIBUS DP is a standardized field

bus system. Only on details and program operation things could be different.

Read user manual carefully for correct operation of other programs than Sycon and Step 7.

• Bronkhorst tooling software: eq FlowFix

The Bronkhorst tooling software is able to communicate with the instrument via RS232 using a special cable. If

you don’t have such a cable ask your local sales representative.

• Via Micro-switch and Led’s

PROFIBUS DP slaves using, will adapt automatically to baud rates determined by the master on a bus
segment.

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The following installation guidelines only apply to data transfer using copper cables (RS 485) to EN

Certified products have undergone extensive tests carried out by specialists to demonstrate their

with PROFIBUS-DP are described in EN 50170.

Pin number

Description

1

not connected

2

not connected

3

RxD/TxD-P - plus (B – wire)

4

RTS 5 DGnd

6

VP(+5V)

7

not connected

8

RxD/TxD-N - minus (A - wire)

9

not connected

Pin number

Signal

Description

1

VP

Power supply plus, (P5V)

2

RxD / TxD-N

Receive / Transmit data –N, A-line

3

DGND

Data ground (reference potential to VP)

4

RxD / TxD-P

Receive / Transmit data –plus, B-line

5

not connected

Thread

Shield

Shield or PE

2 FIELD BUS INSTALLATION

2.1 GENERAL

50170. Furthermore, operators of PROFIBUS equipment are strongly recommended only to use field bus
devices and components which have been certified by the PROFIBUS User Organization e.V. (PNO).

compliance to the PROFIBUS standard EN 50170 in combination with PROFIBUS devices from other
manufacturers. PROFIBUS data transfer is based on the RS 485 standard

PROFIBUS DP field bus wiring is the cause of many problems if not proper installed.
Please use the instructions below and those mentioned on www.profibus.com

2.2 PROFIBUS CONNECTOR

The chassis female PROFIBUS DP (sub miniature 9-pin) D-connector has the following pin configuration:

1. The relevant features for use

The chassis female PROFIBUS M12 B-coded connector (IP65) has the following pin configuration:

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Parameter

Specified limits

Impedance

135..165 Ω with f = 3...20 MHz

Operational capacity

≤ 30 pF/m

Loop resistance

≤110 Ω/km

Wire diameter

>0.64 mm

Wire CSA

> 0.34 mm2

Transmission rate (kbits/s)

maximum Transmission distance* (LT) (meter)

9.6

1200

19.2

1200

45.45

1200

93.75

1200

187.5

1000

500

400

1500

200

3000

100

6000

100

12000

100

* Calculated for PROFIBUS cable type A at 30 pF/m

B-coded

4 2 3 5 1

2.3 PROFIBUS DP CABLES

PROFIBUS cables are shielded twisted-pair copper cables which differ from each other in the type of wire
(fixed/flexible) and/or sheath. The two inner cores of a PROFIBUS cable have green and red insulation. The
specifications in this chapter are primarily intended to provide a general introduction and describe the cable
properties to be considered (see also IEC 61784-5-3).

The cables for PROFIBUS DP are assigned to categories, the so-called line types, which define specific physical
parameters. The individual line types are identified by the capital letters A, B, C and D. When planning a network you
should exclusively use line type A.
The table below shows the parameters of line type A that must be complied with.

2.4 MAXIMAL CABLE LENGTH WITH PROFIBUS DP

The maximum transmission distance (Trunk Line), that can be achieved using copper cables is directly related to the
transmission speed chosen for the PROFIBUS DP network. As a result, these two variables must always be considered
together. The data transmission rate of PROFIBUS DP is adjustable in defined steps between 9.6 and 12.000 kbits/s.
The data transmission rate must be identical for all segments of a PROFIBUS line. The table below shows the
maximum possible transmission distances that can be reached when using copper cables. The minimal cable distance
between two device connections is one (1) meter.

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Transmission rate

(kbit/s)

Total allowable spur capacitance

(nF)

Total Spur cable length* (ΣLS)

(m)

19.2

15

500

93.75

3.0

100

187.5

1.0

33

500

0.6

20

1500

0.2

6.7

> 1500

none

None

* Calculated for PROFIBUS cable type A at 30 pF/m

• The maximal Spur line length is 0.25m

• Uncertified devices can cause reflections.

References:

Spur-lines are not allowed when using higher baud rates (>1.5Mbit/s).

baud rate.

2.5 SPUR LINES WITH PROFIBUS DP

(Also known as stubs or branches)

In table 5 the maximum spur capacitance is set out to the baud rate.
With the use of PROFIBUS cable type A this will result in the stated length.

At baud rates lower than 1.5Mbit/s, spur-lines are allowed up to the maximum capacitance for the

Example:

• The total Spur line length of a segment represents the sum of all Spurs attached to that segment.

• The minimal Trunk line length should be longer then the sum of all Spur lines

• Spurs on DP segments should be avoided where possible.

• Each PROFIBUS device will have a short Spur line carrying the bus signals between the external bus

connector and it’s RS 485 driver chip (for calculations use about 5cm per node).

• Devices are tested for reflections as part of the certification process.

We are installing a M12 system with 19 nodes and a spur length of 25 cm.
Additional 30 Sub-D instruments are installed.
Transmission rate at 1500 kbits/s.

Is this allowed?
(19 nodes x 25cm + 19 nodes x 5cm) + 32 nodes x 5cm = 7.3m
The maximum spur length at 1500 kbits/s is 6.7m so this is not allowed.

When spur lines are installed, additional termination at the end of a spur-line should not be used!
The rule that we must never exceed two terminations per segment, still applies even if using spurs.

http://PROFIBUScentre.com.au/docs/DP_Spur_Lines.pdf

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References:

http://www.PROFIBUS.com

2.6 NETWORK TERMINATION

A PROFIBUS DP network segment is based on an RS485 standard and requires two (2) and only two (2), termination
resistor networks, at each of the furthest ends of the PROFIBUS DP cabling. These resistor networks are integrated in
the IP20 connectors and can be enabled by a slide switch on the side of the connector. If connectors without these
integrated resistors are used, a special termination plug containing this resistor must be placed.

Example of a VP = 5V bus termination network.

To allow correct bus termination, each station must connect the signals DGND and VP (5 V) to pins 5 and 6 of the
connector, respectively. The 5 V supply for the terminating resistors (VP) should have a minimum current rating of 10
mA (the current load can increase to 12 mA if a NULL signal is sent through the bus). The current rating should be
increased to app. 90 mA if you need to be able to supply other types of devices on the bus such as bus terminals and
optical fiber cable drivers.

The electrical equipment in a plant is generally connected to a functional ground. It is used to lead away potential
equalization and interference currents and to ensure compliance with EMC regulations and should thus be installed
with regard to the requirements of high frequency currents.

Due to the capacitive load of the station and the resulting
cable reflections, bus connectors should be provided with
built-in series inductors as shown below.

Due to the built-in series inductors in the bus connectors,
all bus connectors in the network should be attached to the
field bus.

Page 11 PROFIBUS DP interface 9.17.025

http://PROFIBUScentre.com.au/docs/DP_Spur_Lines.pdf

BRONKHORST®

3 CONFIGURATION

3.1 GSD-FILE

Each type PROFIBUS DP instrument should have its own GSD-file with instrument specifications to tell the master
configuration software which facilities/features the instruments offers to the PROFIBUS system. For Bronkhorst
meter/controller the file is called: BHT_0586.GSD. This file is available on the Multibus documentation/software tool
CD.

This GSD-file is a text-file containing:

Identification info:

• Model name: “Bronkhorst meter/controller”

• Vendor name: “Bronkhorst High-Tech B.V.”

• Indent number: 0x0586

• Bitmap device: “0586_dev”

• Bitmap diag: “0586_dia”

• Bitmap SF: “0586_spf”

(Bitmap files are used in configuration software to indicate instrument status)

• Revision numbers

Hardware characteristics:

• SPC3-ASIC / VPC3+C dependable properties

Software characteristics:

• Supported features of PROFIBUS: Freeze, Sync, auto baud rate detection

Max. bus data lengths:

• Size of used data buffers

Parameter dialog boxes and parameter data for a-cyclic instrument variable settings.

Modules with cyclic input / output variables for the instrument.

After starting-up your master configuration software, this GSD-file should be load/import/copied.
This is needed only once (until an eventual next revision from the file).

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3.2 CONFIGURATION SOFTWARE

In this manual we use as an example the software tool from Hilscher G.m.b.H.

The configuration tools offer viewing screens to monitor important GSD-settings.
Examples of these screens with their settings:

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3.3 ADD SLAVE TO PROFIBUS DP

In your master configuration software select: [Insert][slave].
Select [Bronkhorst meter/controller] and evt. press [Add].

An example of this procedure can be found below:

On the main screen the added Bronkhorst instrument can be found.

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More information about modules/parameters or an example of counter and alarm usage can be found

http://www.bronkhorst.com/en/downloads/instruction_manuals/

3.4 SLAVE CONFIGURATION SETTINGS

Bronkhorst PROFIBUS DP instruments offer many available modules/parameters for operation of the instruments.
These modules/parameters can be selected by means of the master configuration tooling software (after loading the
GSD-file: BHT_0586.GSD).

After installing the slave to the PROFIBUS DP system, point to actual slave and select: [slave configuration]. In the first
table all available modules are listed. Select those instrument variables you want to use. The selected modules will be
displayed in the second table.

in the manual “917023 Operational instructions digital instruments”
This document can be found at:

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3.5 SLAVE PARAMETER SETTINGS

If you want to give your instrument specific values for certain variables at start-up you can do this by means of
parameter settings. In your master configuration tool, point to the actual slave instrument and select [Parameter data]
(also accessible sometimes from slave configuration screen). After pressing [common] all available parameter data will
become visible.

Selecting / double clicking on a value to be changed will either pop-up another window with available options or a
window with an edit-box.

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4 SLAVE ADDRESSING

4.1 GENERAL

When you have installed your Bronkhorst meter/controller PROFIBUS DP slave and made right settings for slave
configuration and parameter data, you can give your instrument the slave address you want. Default instruments will
be delivered with slave address 126. This address has been agreed by the PROFIBUS organization to be free for
installing new devices to the bus. Changing the station address can be performed in five different ways:

4.2 VIA ROTARY SWITCHES ON THE SIDE OF INSTRUMENT (IF PRESENT)

On the side of the instrument are rotary switches placed and a label with the
explanation of the switches. Make sure to use a suitable screwdriver for the
switches.

The switches have the following function:

ADDRESS (00 – 99)

With the ADDRESS switch, the slave station address can be set. The MSD is the high part of the decimal number and
the LSD the low part. For instance address 25 means MSD on 2 and LSD on 5. The default switch position is 00. In this
position the address is software programmable. The default software programmable address is 126.

During instrument initialization, the address switches are read. If the switches specify a valid PROFIBUS slave station
address, i.e. a value from 1 to 99, this value is used.

Setting the address is by the rotary switches (non zero) overrules all other methods of addressing.
This means that software addressing is no longer possible.

4.3 VIA PROFIBUS:

Normal way to change addresses. Point to actual slave in your master configuration tool and select [online] [Set slave
address]. Give correct old address and new address and press [Set address].

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FlowFix software can be found at the Bronkhorst website

A special RS232 cable (7.03.366) can be ordered separately. It consists of a T-part with 1 male and 1

connect power-supply and analog interface through the (analog) sub-D 9 connector.

Re-address action can be checked using the option ‘Live list’. This gives an overview of all masters and slaves
connected to a PROFIBUS segment.

4.4 VIA RS232: FLOWFIX

‘Off-line’ via RS232-service communication port by means of a special tooling program, called FlowFix.
FlowFix is a tool for multi-bus instruments which can be used for all field busses enabling the user to:

• Change slave station address

• Read and evt. change baud rate (depends on field bus system)

• Make a service log file to be send to Bronkhorst in case of trouble

http://www.bronkhorst.com/en/products/accessories/software_tools/

Connect your Bronkhorst meter/controller PROFIBUS DP slave instrument to a free COM-port using the cable
mentioned below.

female sub-D 9 connector on one instrument-side and a normal female sub-D 9 connector on the side of
the computer. By means of this cable it is possible to offer RS232 communication and still be able to

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Process

Parameter

Type

R/W

Init mode

Description

125

9

LONG

R/W

Soft init

Baud rate for field bus interface (PROFIBUS: Read only)

125

10

CHR

R/W

Soft init

Field bus station address/MAC ID

See document 9.17.023 for a detailed description

http://www.bronkhorst.com/en/downloads/instruction_manuals/

Start-up FlowFix.exe and select COM-port. Then the configuration screen will appear.

Enter slave station address and press [OK]. Changing baud rate will have no effect for PROFIBUS devices because the
slave will adapt automatically to the baud rate of the master. Baud rate is only meant to be read. Re-address action
can be checked using the option ‘Live list’. This gives an overview of all masters and slaves connected to a PROFIBUS
segment (see example in previous paragraph).

4.5 VIA RS232: OTHER PROGRAMS

It is also possible to read and or change slave station address or baud rate by means of any program via RS232 using
the COM-port of your PC on 38400 Baud. This can be achieved using the FLOW-BUS protocol.

Table 6: Address setting and Baud rate reading by RS232 Pro-par

More detailed information about the RS232 protocol (document 9.17.027) can be found at:

http://www.bronkhorst.com/en/downloads/instruction_manuals/

4.6 VIA MICRO-SWITCH AND LED’S ON TOP OF INSTRUMENT

With the micro-switch on top of the instrument it is possible to change and readout the settings for slave station
address and baud rate. The Led’s will indicate the tens of the address with green flashes and the units with red
flashes. For baud rate-indication both Led’s will flash (baud rate will adjust to master setting automatically and is
therefore read-only).

This document can be found at:

Page 19 PROFIBUS DP interface 9.17.025

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• It is possible that your master configuration software does not support this option.

5 DOWNLOAD TO MASTER

When slave has been installed and all settings are done, everything has to be downloaded to the master. Point to
actual master and select [online][download]. When this is ready, from that moment on there will be data-exchange
between master and slave. The red Led on the instrument will stop blinking slowly and will go off when data-exchange
is O.K.

Data-exchange between master and slaves can be checked with Sycon.
Select [online][start debug mode]. When everything is O.K. the screen looks like this:

• When there is something wrong, see ‘device diagnostic’ for details.

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If your program does not support such option, you have to use your master software or other available

6 TEST COMMUNICATION

Some master configuration tool programs offer facilities to read input I/O and write output I/O data.
In this monitor only the first 32 bytes from your input and output data area will be displayed.

programs to check communication between master and slave(s).

Page 21 PROFIBUS DP interface 9.17.025

7 SAFE STATE

If PROFIBUS communication problems occur, so when instrument is not in data exchange mode, the

safe state.

instrument forces the valve (controllers only) into a safe state mode. This safe state depends on the
type of valve. NC valves will be closed, NO valves will be opened fully. The green and red Led on top of
the instrument indicates this mode by a short flash: 0.1 sec on, 2 sec off. As long as there is no data
exchange between master and slave the instrument will stay in this mode. It will leave this mode
automatically when data exchange starts. Via the RS232 communication interface it is possible to force
the instrument out of the safe state by changing the control mode to a value other than 0. At for
example control mode = 18 (RS232) or control mode = 1 (Analog input) the instrument will not get into

BRONKHORST®

Page 22 PROFIBUS DP interface 9.17.025

8 TROUBLESHOOTING

Led

Time

Indication







Green

off

Continuously

Power-off or program not running

on

Continuously

Normal running/operation mode

Short flash

0.1 sec on,

• Initialization mode

• Safe state active

normal flash

0.2 sec on,

Special function mode

E.g. auto-zero or self-test







Red

off

Continuously

No error

short flash

0.1 sec on,

Bus communication warning. Instrument functions o.k.

Automatic recovery.

normal flash

0.2 sec on,

Warning message.

You are still able to work with your instrument.

long flash

2 sec on,

0.1 sec off

A requested parameter is not available.
See troubleshoot in Profibus manual.

on

Continuously

Critical error message.

Instrument needs service before further using.

Wink Mode 





Green 





Red 





Green 





Red turn by turn

slow wink

0.2 sec on,

Wink mode

with Led’s to indicate its position in a (large) system

normal wink

1 sec on,

1 sec off

Alarm indication: minimum alarm, limit/maximum alarm; power­up alarm or limit exceeded or batch reached.

fast wink

0.1 sec on,

0.1 sec off

Switch-released, selected action started

8.1 LED INDICATION

BRONKHORST®

2 sec off

0.2 sec off

2 sec off

0.2 sec off

0.2 sec off

• Secured parameters can be changed

Instrument is busy performing any special function.

No data-exchange between master and slave.

An error occurred of minor importance.
It would be wise to investigate the cause of this.

A serious error occurred in the instrument.

By a command send via FLOW-BUS the instrument can “wink”

Page 23 PROFIBUS DP interface 9.17.025

PROFIBUS problems

No Communication

• Check power supply and cabling.

• Contact PROFIBUS sales representative or service department.

Flow is not reacting to

• In case of PROFIBUS communication problems instrument will put it’s valve into a

Red Led has long flash

• Make sure the requested parameters are available in the particular Bronkhorst

8.2 TROUBLESHOOTING HINTS AND TIPS

• Check bus termination. At the beginning and end of a bus segment, termination
should be enabled in your connector or by means of any external special resistor
network.

• Check all PROFIBUS settings at your master. Master and slave settings for use of
memory modules must be the same. Select at least one module e.g. ‘Measure,
integer (read)’ otherwise there will be no data-exchange.

• Check address of interface (slave)

• Try to reset the instrument and/or restart your master.

• Make sure all settings for your slave are downloaded to your master (otherwise it

won’t work).

BRONKHORST®

setpoint commands

safe state. This will close (NC) or open the valve fully (NO). When data exchange
between master and slave has been re-established, instrument will respond to
setpoint again. For overruling safe state via RS232 interface, see setpoint /control
modes in chapter 2.5 from doc. nr. 9.17.023, (digital instrument description).

Profibus-DP slave.

• Delete the Profibus slave configuration and add a new slave in your software, this
will remove a corruption in the software configuration.

Page 24 PROFIBUS DP interface 9.17.025

BRONKHORST®









9 SERVICE

For current information on Bronkhorst and service addresses please visit our website:

Do you have any questions about our products? Our Sales Department will gladly assist you selecting the right product
for your application. Contact sales by e-mail:

For after-sales questions, our Customer Service Department is available with help and guidance. To contact CSD by e­mail:

No matter the time zone, our experts within the Support Group are available to answer your request immediately or
ensure appropriate further action. Our experts can be reached at:

http://www.bronkhorst.com

[e-mail]

[e-mail]

[phone]

Page 25 PROFIBUS DP interface 9.17.025