Bronkhorst PROFIBUS-DP slave interface - Manual (Page 4)

BRONKHORST ®
1 GENERAL PRODUCT INFORMATION
1.1 I
NTRODUCTION
This manual will explain how to install a Bronkhorst 1 instrument to
your PROFIBUS DP system. It only contains information which is
needed most.
More detailed information about PROFIBUS can be
obtained on the website of the (international)
PROFIBUS organization: www.profibus.com or on
the website of the (local) PROFIBUS organization of
your country (when available).
Example of a Bronkhorst instrument
with PROFIBUS interface
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 It was superseded in 2003 by the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).
Page 4 PROFIBUS DP interface 9.17.025