Bronkhorst Modbus slave interface - Manual (Page 15)

BRONKHORST ®
3.4.2 Change bus-address and baud rate:
Pressing the switch 5x briefly with intervals of max. 1 second in normal running/operation mode. Within the time-out
period of 60 seconds it is possible to start changing the bus-address/MAC-ID of the instrument. For certain field bus
systems it is necessary to select the baud rate also. Other field bus systems only have one baud rate or the baud rate
setting will adapt to the setting of the master automatically. In these cases baud rate selection is not needed and will
be skipped.
Procedure for changing bus-address and baud rate
Step Action Indication time handling
1 Start Press the switch 5x briefly with intervals of max. 1
second in normal running/operation mode.
2 Set tens of bus-
address
   Green LED flashes
0.1 sec on
0.1 sec off
count-flashes
start when switch
is pressed:
0.5 sec on,
0.5 sec off
time-out:
60 sec
Press switch and count green flashes for tens of
bus-address.
Release when wanted amount has been count.
Counts up to max. 12 and than starts at 0 again.
When counting fails, keep switch pressed and
restart counting for next attempt.
3 Set units of bus-
Address
   red LED flashes
0.1 sec on
0.1 sec off
count-flashes
start when switch
is pressed:
0.5 sec on
0.5 sec off
time-out:
60 sec
Press switch and count red flashes for units of bus-
address.
Release when wanted amount has been count.
Counts up to max. 9 and than starts at 0 again.
When counting failed, keep switch pressed and
restart counting for next attempt.
4 Set baud rate of
field bus
communication.
1 = 9600 Baud
2 = 19200 Baud
3 = 38400 Baud
4 = 57600 Baud
5 = 115200 Baud
both    red
and    green
LED flashes
0.1 sec on
0.1 sec off
count-flashes
start when switch
is pressed:
0.5 sec on,
0.5 sec off
time-out:
60 sec
Press switch and count red and green flashes for
baud rate setting.
Release when wanted amount has been count.
Counts up to max. 5 and than starts at 0 again.
When counting failed, keep switch pressed and
restart counting for next attempt.
Note: selection of 0 means: No change
Instrument returns to normal running / operation mode. Changes are valid when they are made within the time-out
times.
Value zero will be indicated by a period of 1 sec. off (0.5 sec. off + 0.5 sec. off).
When value zero is wanted, press switch shortly and release it again within 1 sec.
Before each action of flash-counting, the LED’s to be used for counting will flash in a high frequency.
(Pattern: 0.1 sec on, 0.1 sec off). As soon as the switch is pressed-down, this LED (or both LED’s) will be
off and the counting sequence will start.
3.5 By user interface (if present)
See the manual of the instrument for a description of the user interface.
Page 15 Modbus interface 9.17.035