Bronkhorst EL-FLOW Base 2014 - Manual (Page 16)

BRONKHORST HIGH-TECH
Physical layer and communication protocol are detected automatically upon reception of messages.
These messages must be sent using the correct combination of physical layer and communication
protocol. After every power-up the communication detection mode is active.
3.4.1 Slave address, baud rate and parity setup
Default instruments will be delivered to customers on address 1 and with a baud rate of 19200 baud and
EVEN parity.
The slave address, baud rate and parity of the Bronkhorst meter/controller Modbus slave can be
changed to fit the instrument in your existing Modbus network. Changing the slave address, baud rate
and parity can be done in the following ways.
Using RS232: FlowDDE
‘Off-line’ via the RS232 communication port by means of FlowDDE. This program can be used to
read/change parameters, including the slave address, baud rate and parity.
Connect your Bronkhorst meter/controller Modbus slave instrument to a free COM-port using the
special cable with on one side a T-part with male and female sub-D 9 connector and on the other side a
female sub-D 9 connector (part number 7.03.366). The single sub-D 9 connector should be connected to
your COM-port and the female sub-D 9 of the T-part to the male sub-D 9 of the instrument. Standard
cables are approx. 3 meters. Maximum length between PC and instrument allowed is approximately 10
meters.
Start FlowDDE and open communication via the menu (as shown below) or by pressing .
Once the DDE server is active, open the FlowDDE Test Form via the menu (as shown below) or by
pressing .
Page 16 EL-FLOW Base Series Mass Flow Controllers 9.17.061