Bronkhorst®
Instruction Manual EL-FLOW® Select
9.17.099J
44
Communication via the power supply connection(RS232/RS485)
Use the following parameters to configure the instrument for communication via the 9-pin D-sub (power) connection:
·
If the 9-pin D-sub connector is set for RS-485 communication, the instrument will not respond to an RS-232 master. In
to enter configuration mode and enable RS-232 communication.
·
After configuring the required parameters, follow the same procedure to leave configuration mode and restore the
original communication settings (otherwise, configuration mode will remain enabled after the next power-up).
Fieldbus 2 Address
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
B
0…255
309
124/10
0x0F8A/3979
Fieldbus 2 Baud Rate
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned long
RW
B
0…1.0E10
310
124/9
0xFC48…0xFC49/64585…64586
Fieldbus 2 Parity
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
B
0…2
336
124/12
0x0F8C/3981
The following values are supported:
Value
Description
0
No parity
1
Odd parity
2
Even parity
4.7
Fluid set
For changing fluid, flow range or operating conditions, using the FlowTune software is advised. FlowTune checks any
changes for compatibility of the process conditions with the instrument. When the parameters described in this section are
changed manually, no such checks are performed, and the instrument output may become disordered or the instrument
may even get damaged if used in conditions the instrument is not suited for. When in doubt, consult your Bronkhorst
representative.
Fluid Set Index
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…7
24
1/16
0x0030/49
With this parameter, any of the pre-configured fluids (up to 8) can be selected. Each fluid has its specific (configurable)
properties, such as
Fluid Name
,
Capacity
, etc.
Default value: 0 (fluid 1).
Note that the selected value is equal to the fluid number minus 1 (value 0 corresponds to fluid 1, value 1 to fluid 2, etc.)
Fluid Name
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char[10]
RW
B
-
25
1/17
0x8188…0x818C/33161…33165
This parameter contains the name of the selected fluid.