Bronkhorst®
Instruction Manual EL-FLOW® Select
9.17.099J
37
4.2
Measurement and control
Measure
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned int
R
0…41942
8
1/0
0x0020/33
This parameter indicates the flow metered by the instrument. The value of 32000 corresponds to 100%, the maximum
measured value output is 131.07%, which translates to 41942.
Setpoint
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned int
RW
0…32767
9
1/1
0x0021/34
This parameter is used to set the required flow rate for the controller. Within the setpoint range, value 32000 corresponds to
100%
To convert
Measure
and
Setpoint
to actual mass or volume flows, use parameters
Capacity
and
Capacity Unit
(see
Temperature
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
R
-250…500
142
33/7
0xA138…0xA139/41273…41274
This parameter returns the internal temperature in the instrument housing in °C, which is an approximation of the actual
media temperature.
Pressure
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…3.4E+38
143
33/8
0xA140…0xA141/41281…41282
In case an external pressure sensor is connected, this parameter returns the actual system pressure in bar(a).
If there is no external pressure sensor, the default value of this parameter is equal to parameter
Inlet pressure
.
4.2.1
Advanced measurement and control
Fmeasure
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
R
-3.4E+38…
3.4E+38
205
33/0
0xA100…0xA101/ 41217…41218
Floating point variant of
Measure
.
Fmeasure
shows the measured value in the capacity unit for which the instrument is set.
The instrument uses parameters
Capacity
,
Capacity 0%
,
Capacity Unit
and
Sensor Type
to calculate
Fmeasure
.
Fsetpoint
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Float
RW
0…3.4E+38
206
33/3
0xA119…0xA11A/ 41241…41242
Floating point variant of
Setpoint
.
Fsetpoint
shows the setpoint in the capacity unit for which the instrument is set. Like
Fmeasure
,
Fsetpoint
is dependent of
Capacity
,
Capacity 0%
,
Capacity Unit
and
Sensor Type
.
