Bronkhorst EL-FLOW Base 2014 - Manual (Page 17)

BRONKHORST HIGH-TECH
The following screen appears:
To read/change the slave address, parameter 199: Bus address must be selected. To read/change the
baud rate, parameter 201: Baudrate must be selected. And to read/change the parity parameter 335:
Bus1 Parity must be selected. To change one of these parameters parameter 7: Initreset has to be set to
‘64’ first.
Valid values for the slave address are between 1 and 247, valid values for the baud rate are 9600, 19200
and 38400, valid values for parity are 0 (= None), 1 (= Odd) and 2 (= Even). The changed values will be
effective immediately after changing.
Note: There are no hardware switches available on the Bronkhorst High-Tech instruments for Slave
address and Baud rate setting.
Using micro-switch and LEDs on top of the instrument
Readout bus-address/MAC-ID and baud rate:
Pressing the switch 3x briefly with intervals of max. 1 second in normal running/operation mode will
trigger the instrument to “show” its bus-address/MAC-ID and baud rate.
For indication the bus-address/MAC-ID the green LED will flash the amount of tens and the red LED the
amount of units in the number. For indication of baud rate setting, both LEDs will flash.
The flashes are called “count-flashes” and have a pattern of 0.5 sec. on, 0.5 sec. off.
Table: LED indications for bus-address and baud rate
Green LED
Red LED Time Indication
amount of count
flashes (0...12)
Off 0 ... 12 sec.
Maximum
tens in bus-address for instrument
Off Amount of count flashes
(0...9)
0 ... 9 sec.
Maximum
units in bus-address for instrument
amount of count
flashes (1...3)
amount of count flashes
(1...3)
1 ... 3 sec.
Maximum
baud rate setting for instrument
1 = 9600 Baud
2 = 19200 Baud
3 = 38400 Baud
Note: Value zero will be indicated by a period of 1 sec. off (0.5 sec. off + 0.5 sec. off).
Examples:
• For bus-address 35 / 9600 baud the green LED will flash 3 times, the red LED will flash 5 times and
both LEDs will flash 1 time.
• For bus-address 20 / 19200 baud the green LED will flash 2 times, the red LED will flash 0 times and
both LEDs will flash 2 times.
• For bus-address 3 / 38400 the green LED will flash 0 times, the red LED will flash 3 times and both
LEDs will flash 3 times.
Change bus-address/MAC-ID and baud rate:
Pressing the switch 5x briefly with intervals of max. 1 second in normal running/operation mode will
trigger the instrument to enter the bus configuration mode.
Within the time-out period of 60 sec. it is possible to start changing the bus-address/MAC-ID of the
instrument (see table below).
Table 7: Procedure for changing bus-address and baud rate
9.17.061 EL-FLOW Base Series Mass Flow Controllers Page 17