Bronkhorst®
Instruction Manual MI Series Industrial mini CORI-FLOW™
9.17.120A
26
Changing network settings
·
By briefly pressing the switch 5 times with intervals of up to 1 second in normal operation mode, the instrument enters a
state in which the node address and baud rate of the instrument can be changed (non-Ethernet based protocols only; for
Ethernet based protocols (EtherCAT®, PROFINET), network parameters are configured by the fieldbus master and cannot
be set on the instrument).
·
Changing network parameters with the multifunctional switch is done in 3 steps, each represented by a LED indication
pattern (green, red or both; see table below).
·
At the start of each step, the according LED(s) start(s) flashing fast (0.1 second on, 0.1 second off). By pressing and holding
the switch, the associated action is started and the flashing slows (05. seconds on, 0.5 seconds off).
Step Pattern
Maximum
flash
count
Action
1.
Green
•
•
12
set tens of node address
2.
Red
•
•
9
set units of node address
3.
Green and red
(simultaneous)
•
•
10*
set baud rate index (number of flashes)
*) maximum count depends on the supported baud rates of the fieldbus. See the baud rate table above for supported baud
rates and associated indexes.
To execute a step, follow these instructions:
·
Press and hold the switch (flashing slows)
·
To select value 0 (zero), release the switch within 1 second, otherwise:
·
Count the number of LED flashes
·
Release the switch when the required value is reached
·
In case you lose count, keep the switch pressed and wait until the flash count reaches its maximum and restarts
On completion of a step, the instrument automatically advances to the next step. When all required steps have been
completed, the instrument returns to its normal operation mode.
If the switch is not pressed within 60 seconds after starting a step, all changes in the previous steps are canceled and the
instrument returns to its normal operation mode.
3.7.3
Rotary switches
Using the MSD and LSD switches, the main fieldbus address (Fieldbus 1) of the instrument can be
selected, in the range from 1 to 99. MSD (Most Significant Digit) sets the tens, LSD (Least Significant Digit)
sets the units.
If both switches are set to 0, the node address is selected according to the digital parameter settings (see
), otherwise the rotary switch setting overrules the digital parameter settings.
The switches can be adjusted using a small flat blade screwdriver.
3.7.4
Bus termination switches
To minimize signal reflections on the fieldbus network and achieve reliable data transfer over a FLOW-BUS, Modbus or
PROFIBUS DP system, the network must be terminated properly. The bus termination DIP switches replace the termination
resistors that are used normally for the according fieldbus types. On instruments that are installed at the beginning or at
the end of the fieldbus, the DIP switches must be configured accordingly (
up = on, down = off
):
Normal (default):
Begin terminator:
End terminator:
