BRONKHORST FLOW-BUS User manual

Instruction manual
FLOW-BUS interface
for digital
Mass Flow / Pressure instruments
Doc. no.: 9.17.024K Date: 26-02-2010
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.

BRONKHORST HIGH-TECH B.V.
9.17.024 Page 2
SCOPE OF THIS MANUAL
This manual covers the interface part of digital massflow / pressure instruments for gases and
/ or liquids. It describes the communication between the instrument and the operator according
to the specific (fieldbus) protocol.
More information can be found in other documents.
Multibus instruments have modular instruction manuals consisting of:
-General instructions digital Mass Flow / Pressure instruments
laboratory style / IN-FLOW (document nr. 9.17.022)
-General instructions CORI-FLOW (document nr. 9.17.031)
-Operation instructions digital instruments (document nr. 9.17.023)
-Fieldbus/interface description:

BRONKHORST HIGH-TECH B.V.
9.17.024 Page 3
Short form start-up
Procedure:
1Connect instrument to the bus
cablecable
Y-adapter
7.03.319
cable
cable RJ45 toM12
beginterminator
7.03.297
Y-adapter
7.03.241
Y-adapter
7.03.319 Y-adapter 7.03.319
endterminator
7.03.321
Y-adapter
7.03.319
patchcable
Y-adapter
7.03.241
patchcable
Y-adapter
7.03.241
Y-adapter
7.03.241
patchcable
Y-adapter
7.03.241
beginterminator
7.03.297
patchcable
endterminator
7.03.298
Y-adapter
7.03.241
endterminator
7.03.321
Y-adapter
7.03.319
beginterminator
7.03.297
Y-adapter
7.03.241
Y-adapter
7.03.241
endterminator
7.03.298
beginterminator
7.03.297
Y-adapter
7.03.241
patchcable cable RJ45 to M12

BRONKHORST HIGH-TECH B.V.
9.17.024 Page 4
cable
endterminator
7.03.321
Y-adapter
7.03.319
Y-adapter
7.03.319
Y-adapter
7.03.319
cable cable
Y-adapter
7.03.241
beginterminator
7.03.297
cable RJ45 to M12
Y-adapter
7.03.319
cable
Y-adapter
7.03.319
Y-adapter
7.03.241
cable RJ45 to M12
Y-adapter
7.03.319
cable
cable RJ45 to M12
cable
Y-adapter
7.03.319 Y-adapter 7.03.319
power isolator
1.09.239
Y-adapter
7.03.241
beginterminator
7.03.297
endterminator
7.03.298
Y-adapter
7.03.241
patchcable
Y-adapter
7.03.241
patchcable patchcable patchcable
Y-adapter
7.03.241 Y-adapter
7.03.241
patchcable
patchcablepatchcable
Y-adapter
7.03.241
patchcable
Y-adapter
7.03.241
Y-adapter
7.03.241
Y-adapter
7.03.241
patchcable
Y-adapter
7.03.241
power isolator
7.03.350

BRONKHORST HIGH-TECH B.V.
9.17.024 Page 5
endterminator
7.03.321
Y-adapter
7.03.319
Bronkho rst
®
HIGH-TECH
beginterminator
7.03.297
endterminator
7.03.298 endterminator
7.03.298
Y-adapter
7.03.241 Y-adapter 7.03.241 Y-adapter 7.03.241
beginterminator
7.03.297
Y-adapter
7.03.241
Y-adapter
7.03.241
patchcable patchcable patchcable
Bronkhorst
®
HIGH-TECH
Bronkho rst
®
HIGH-TECH
Bronkhorst
®
HIGH-TECH
Y-adapter
7.03.319
Incorrect Correct
Y-adapter
7.03.319
endterminator
7.03.321
Y-adapter
7.03.319
beginterminator
7.03.297
Y-adapter
7.03.241
Incorrect Correct
The last instrument on the bus needs a bus-end-termination connector (black).
The first module on the bus (either an E-7000 module for digital instruments or a FLOW-BUS interface
module to a PC) needs a bus begin – terminator (red).

BRONKHORST HIGH-TECH B.V.
9.17.024 Page 6
2 Make instrument operational on the bus
(give it a FLOW-BUS node-address)
If rotary switches are present on the side of the instrument, please see paragraph 2.6.4.
Complete FLOW-BUS systems are already factory configured and tested and will be directly operational on
the bus. However, changes in the system or adding new modules could need new (free) addresses on the
FLOW-BUS.
Watch the LED’s on top of the instrument when the instrument powers-up.
If the green LED is burning continuously and the red LED is off, everything is o.k. the instrument is
operational on the bus.
If the red LED is blinking slowly, the FLOW-BUS address is already occupied. In that case: press the micro
push-button and release it after 2 seconds. Now the instrument is operational on the bus (pressing the push-
button for 1 to 4 seconds will activate the auto install function, the instrument will install itself to a free node-
address).
3 Make link to operator module
(search module on the bus with the operator).
You can search for this instrument, looking for type and serial number.
a With E-7000 module for digital instruments:
Go to the FLOW-BUS menu and select “OPERATE INSTR.”.
Use <- or -> keys to search the bus for the wanted instrument.
Instruments can be identified by their serial number. Also both LED’s on the instrument will blink turn by
turn (wink) for some seconds.
When found, press middle-key (enter) to make connection for operation.
b With PC-software application:
When you use FLOWDDE or FLOWBUS.DLL (for Windows applications) all
modules connected to FLOW-BUS will be recognised automatically. They will be assigned to a channel
for operation. (see FLOW-DDE configuration menu)
Other programs will have to get procedures for reading identification of instruments. For details, see
FLOW-BUS software documentation.
Send a setpoint to the instrument and check the measured value
Let the instrument warm-up for 30 minutes for best accuracy
Your Mass Flow Meter/Controller is now ready for operation.

BRONKHORST HIGH-TECH B.V.
9.17.024 Page 7
Table of contents
1Changing parameters via FLOW-BUS.......................................................................................................................8
2FLOW-BUS.................................................................................................................................................................9
2.1 General................................................................................................................................................................9
2.2 Technical information ..........................................................................................................................................9
2.3 Cables ...............................................................................................................................................................10
2.4 Termination .......................................................................................................................................................10
2.5 Power supply.....................................................................................................................................................11
2.6 Installation .........................................................................................................................................................11
2.6.1 Automatic installation to FLOW-BUS.........................................................................................................11
2.6.2 Remote installation to FLOW-BUS ............................................................................................................11
2.6.3 Install to bus on a pre-defined node-address or re-address instrument on the bus..................................12
2.6.4 Install to bus via rotary switches on the side of the instrument (if present)...............................................12
2.7 Security and flexibility........................................................................................................................................13
3FLOW-BUS system operation with computer...........................................................................................................14
3.1 Communication with FLOW-BUS DDE server..................................................................................................14
3.2 Communication with FLOW-BUS directly through DLL ....................................................................................14
3.3 Communication with interface directly through RS232.....................................................................................14
4FLOW-BUS connector..............................................................................................................................................15
TROUBLESHOOTING.....................................................................................................................................................16

BRONKHORST HIGH-TECH B.V.
9.17.024 Page 8
1 Changing parameters via FLOW-BUS
For security reasons all important instrument settings can only be changed after entering a
password (using E-7000 readout/control modules) or after sending a security-parameter (using
PC-software programs).
For operation of instruments there is always free access to the parameters (e.g. setpoint,
control mode, setpoint slope, changing fluid).
Changing of settings however, is secured (e.g. calibration parameters, input + output
adjustments, identification, FLOW-BUS network settings).
When using Bronkhorst High-Tech Electronics, like E-7000 systems, changing of parameter
settings at digital instruments is possible via the menu.
However, when changing of parameter settings via other (self-made) software running on
computers using RS232 and/or FLOW-BUS DLL and/or FLOWDDE is wanted, for safety
reasons setting of special initialisation parameters is needed first.
For changing secured parameter values by means of a PC-software program contact
Bronkhorst High-Tech B.V.
Nijverheidsstraat 1a
7261 AK Ruurlo
The Netherlands
tel: [phone]
fax: [phone]
mail: [e-mail]

BRONKHORST HIGH-TECH B.V.
9.17.024 Page 9
FLOW-BUS
IN/OUT
3
1
7.03.297
BEGIN TERMINATOR
7.03.241
MODULAR Y-ADAPTER
USERTAG AIR
10.00 ln/min
3
1.09.240
END TERMINATOR
EL-FLOW
mass flow meter/controller
FLOW-BUS
CE Ruurl o-Holland
EL-FLOW
mass flow meter/controller
FLOW-BUS
CE Ruurlo-Holland
EL-FLOW
massf low meter/controller
FLOW-BUS
CE Ruurl o-Holland
EL-FLOW
massflow meter/controller
FLOW-BUS
CE Ruurlo-Holl and
7.03.299
RJ45 Multi-port adaptor 7.03.299 RJ45 Multi-port adaptor
EL-FLOW
mass flow meter/controller
FLOW-BUS
CE Ruurlo-Holland
EL-FLOW
massf low meter/controller
FLOW-BUS
CE Ruurlo-Holland
EL-FLOW
massflowmeter/controller
FLOW-BUS
CE Ruurlo-Holland
EL-FLOW
mass flow meter/controller
FLOW-BUS
CE Ruurlo-Holland
Node 1
Node 2
Node 3
Node 4
Node 5
Node 6
Node 7
Node 8
Node 9
Node 10
PowerIsolator
1.09.239
RS232
2 FLOW-BUS
2.1 General
FLOW-BUS is a 3-wire, RS485-based fieldbus communication system for parameter value exchange between
digital BRONKHORST HIGH-TECH B.V. products.
In this system each instrument/device is equipped with a micro-controller for its own dedicated task but also for
exchanging parameter value information with other instruments/devices connected to the same FLOW-BUS
system.
2.2 Technical information
FLOW-BUS systems may have a minimum of 2 and a maximum of 126 connections.
The maximum length for datalines between the first and the last connection may be up to approx. 600 meters.
Longer distances are only possible in combination with special bus-repeater modules.
Each instrument/device connection T-part (stub) must be kept as short as possible (max. cable length 0.5
meter!).
The baudrate used to transport messages is 187.5 Kbaud.
FLOW-BUS is a multi-master network with a token-ring architecture.

BRONKHORST HIGH-TECH B.V.
9.17.024 Page 10
2.3 Cables
For connecting instruments to the FLOW-BUS you need shielded cables with at least 3 wires (for data only).
Recommended are twisted wire cables for RS485-communications with 100 or 120 Ohm impedance.
All Bronkhorst High-Tech FLOW-BUS cables have also integrated power-supply wires.
For the use in the EL-FLOW range (non IP-65) it is best to use Shielded (+Foiled) Twisted Pair patch-cables
with RJ45 modular jack connectors (8-pins for data and power-supply connections).
For the use in for example the IN-FLOW range or CORI-FLOW range (IP-65 applications) it is best to use
DeviceNet Drop cables assembled on both sides with male connector M12 – female connector M12 (5-pins for
data and power-supply connections).
In case of powering instruments or transporting data over longer distances Bronkhorst High-Tech offers also
special RS485 FLOW-BUS datacable, with lower voltage-drop.
Bronkhorst High-Tech can advise you when to use this special cable, but for most cases the standard
patch-cables will do well.
If more cables are used in one system, they have to be connected as a daisy-chain. This means that the
total FLOW-BUS system has only one begin and one end.
For connecting instruments to the bus, Bronkhorst High-Tech offers special drop-cables which enable you
to build a daisy chained network of FLOW-BUS modules.
2.4 Termination
For best quality of data transfer FLOW-BUS should be terminated correctly.
Termination can be performed with special termination-connectors, offered by Bronkhorst High-Tech B.V.
At the begin of each FLOW-BUS system there always must be a resistor network as showed above.
This begin-terminator needs to be part of your system. Bronkhorst High-Tech offers special begin-termination
connectors with the resistor network.
This handles correct termination but also gives a defined voltage on the RS485-A and -B line for even more
reliability of the FLOW-BUS system.
Bronkhorst High-Tech advises always to use a termination resistor at the end of the bus in your system .
This end-terminator is also offered by Bronkhorst High-Tech and handles correct termination for the
FLOW-BUS.
Black
End
termination
Begin
termination
Red 0Vdc
Connected
modules
0Vdc
Power
supply
RS485-A
RS485-B
RS485-A
RS485-B
FLOWBUS