Bronkhorst®
Instruction Manual mini CORI-FLOW ML120
9.17.097G
45
4.8.3
Fluid mixture parameters
Mix Fraction Type
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…2
346
126/4
0x0FC4/4037
Set the fraction type for the mixture:
Value
Description
0
Volume fraction
1
Mass fraction
2
Mole fraction
Mix Volume Temperature
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
-250…500
347
126/5
0xFE28…0xFE29/65065…65066
Temperature for the mixture specification in °C. The value of this parameter is only relevant if
Mix Fraction Type
= 0.
Mix Volume Pressure
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…3.4E+38
348
126/6
0xFE30…0xFE31/65073…65074
Pressure for the mixture specification in bar(a). The value of this parameter is only relevant if
Mix Fraction Type
= 0.
Mix Component Index
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…4
349
126/7
0x0FC7/4040
Index for the gas component in the mixture (max. 5 components).
Mix Component Fraction
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…1
350
126/8
0xFE40…0xFE41/65089…65090
Mix fraction for the according mix component (
Mix Component Index
). The value range corresponds with 0…100%. The sum
of the all mix fractions must be equal to 1.
If the value is 0, the next component slots are ignored.
Mix Component Fluid Name
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char[10]
RW
-
351
126/9
0xFE48…0xFE4C/65097…65101
This parameter contains the fluid name for the according mix component (
Mix Component Index
). This parameter may contain
one of two value types:
·
Gas name, e.g. 'N2', 'He', 'C3H6 #2'.
·
CAS Registry Number, e.g. '7727-37-9', '7440-59-7', '115-07-1'
If the parameter contains no name, the next component slots are ignored.
4.9
Master/slave configuration (FLOW-BUS)
Normally, there is no communication between slave instruments in a fieldbus system. The FLOW-BUS protocol, however,
provides a feature to set up a master/slave relationship between two instruments. The typical behavior of a slave
instrument is to automatically set its own setpoint relative to the output (measurement value) of its master.