BRONKHORST mini CORI-FLOW M1 Series, Instruction Manual

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Bronkhorst®
Instruction Manual mini CORI-FLOW™ M1x 9.17.050O 30
Other interface protocols
Parameter descriptions in this document are based on their availability with FLOW-BUS, Modbus or RS-232 (ProPar)
communication. Due to limitations in, for example, memory capacity or communication properties, definition files for other
fieldbus systems usually do not make all parameters available.
For more information about parameter access and availability, refer to the according fieldbus manual (see
Documentation ).
A summary of all digital parameters described in this section can be found in the back of this manual.
4.1 Measurement and control
Measure
Type Access Range FlowDDE FLOW-BUS Modbus
Unsigned int R 0…41942
(65535*)
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.
*In case the instrument is prepared for bi-directional measurement, the negative signals with an output range of -
73.73…-0.003% are represented by the range of 41943…65535, whereas the positive signals 0…131.07% are still
represented by the range of 0…41942. (FlowDDE converts the numbers to negative values automatically).
Setpoint
Type Access Range FlowDDE FLOW-BUS Modbus
Unsigned int RW 0…32000 9 1/1 0x0021/34
This parameter is used to set the required flow rate for the controller. The signals have the same range as Measure , but the
setpoint range is limited between 0 and 100% (0…32000).
Temperature
Type Access Range FlowDDE FLOW-BUS Modbus
Float R -250…500 142 33/7 0xA138…0xA139/41273…41274
This parameter returns the temperature in °C on the outside of the sensor tube, 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
This parameter contains a fixed (reference) value that can be used for capacity calculations, etc. Its default value is equal to
that of parameter Inlet pressure .
Density Actual
Type Access Range FlowDDE FLOW-BUS Modbus
Float R 0…3.4E+38 270 116/15 0xF400…0xF401/62465…62466
This parameter returns the actual density measured by the instrument in kg/m 3 . If the selected Capacity Unit is a volume flow
type, the instrument uses this parameter for conversion of the measured mass flow to the selected unit.