Bronkhorst DeviceNet slave interface - Manual (Page 5)

BRONKHORST ®
Page 5 DeviceNet interface 9.17.026
1 GENERAL PRODUCT INFORMATION
1.1 I
NTRODUCTION
The DeviceNet interface offers a direct connection to
DeviceNet Networks for Bronkhorst
1) digital mass‐
flow/pressure meters/controllers according to the Mass
Flow Controller Profile specified by the ODVA. This
manual is limited to the description of the interface
between the DeviceNet Mass Flow Controller with a
master device.
This manual will explain how to install a Bronkhorst instrument to your DeviceNet system. It only consists of that
information which is needed most.
There is no mutual communication between DeviceNet slaves, only between master and slave. Each slave should have
its own unique MAC ID on the network, otherwise there is no communication possible. Setting MAC ID can be
performed by either:
 Master configuration software
 Bronkhorst tooling software: FlowFix (on Multibus documentation/software tool CD)
This programme 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.
 Button (+ LED's) on top of the instrument
 Rotary switches on the side of the instrument (if present).
1) Bronkhorst: This includes Bronkhorst High‐Tech B.V. , Bronkhorst Cori‐Tech B.V. and
M+W Instruments GmbH.
1.2 M
ULTIBUS 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superseded in 2003 by the Multibus type 2 (MBC‐II).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).
Information about DeviceNet can be found at the website of de ODVA
organisation.
www.odva.org