Bronkhorst®
Instruction Manual EL-FLOW® Prestige
9.17.084N
26
Mode:
Digital
Interface/medium:
RS485
Protocol:
FLOW-BUS
Modbus RTU
Modbus ASCII
Baud rate:
187500
400000
9600
19200
38400
56000
57600
115200
128000
256000
9600
19200
38400
56000
57600
115200
128000
256000
Node address:
3…125
1…247
1…247
Parity:
None
None; Even; Odd
None; Even; Odd
Changing RS485 settings of the RJ-45 top connector interface
In case the FLOW-BUS or Modbus RJ-45 field bus connector is used for bus
communication, the node address can be easily set by using the rotary switches on the
side of the instrument. Use the ‘MSD’ (Most Significant Digit) to set the ‘tens’ of the
bus-address and the ‘LSD’ (least Significant Digit) to set the ‘unit’ of the bus-address
(the example on the right reads ‘63’). Set the rotary switches to '00' for automatic
installation. Refer to the corresponding field bus manual,
document 9.17.024
(FLOW-
BUS) or
document 9.17.035
(Modbus) for more details.
For changing the baud rate or parity settings use the RS232 interface to change the
corresponding parameters (see section
).
Changing RS485 settings of the 9-pin D-sub side connector interface
In case the 9-pin D-sub side connector is set for RS485 communication, the baud rate or node address can be changed by
using the micro switch or by changing the settings in the ‘Configuration Mode’. Refer to
section 3.8
for changing node
address and baud rate with the micro switch. Other communication parameters can be changed only in the ‘Configuration
Mode’. Activate the ‘Configuration Mode’ by pressing the micro switch at start-up according to the description in the
previous. In ‘Configuration Mode’ the bus type and baud rate are set to RS232 FLOW-BUS (ProPar) at 38400 Baud. Change
the appropriate parameters as described in
. When finished, deactivate the ‘Configuration Mode’
using the same procedure. Now the instrument is ready to use in the desired configuration with the adjusted baud rate,
node address or parity.
Any changes made to the instrument communication settings will
not
be restored after a factory reset.
3.6
Other fieldbus configurations
The following fieldbuses are optionally available for the
EL-FLOW® Prestige
instruments. For all mentioned fieldbus
systems the
EL-FLOW® Prestige
instruments serve as slaves on the master/slave bus system. There is no mutual
communication between slaves, only between master and slave.
PROFIBUS DP
PROFIBUS DP is a 2-wire, RS-485-based industrial data communication standard (fieldbus) which allows automation
components (e.g. sensors, actuators and controllers) to exchange information.
Consult
Instruction manual PROFIBUS DP interface
(document no. 9.17.025) for more information about setting up a
PROFIBUS DP network.
DeviceNet™
The DeviceNet™ interface offers a direct connection to a DeviceNet™ network, according to the mass flow controller profile
specified by the ODVA. The Bronkhorst® DeviceNet™ instrument is a Group 2 Only Server device whose messages comply
with the Controlled Area Network (CAN) 2.0A standard and with the DeviceNet™ protocol.
Consult
Instruction manual DeviceNet™ interface
(document no. 9.17.026) for more information about setting up a
DeviceNet™ network.
