Bronkhorst EL-FLOW Prestige - Manual (Page 28)

Bronkhorst High-Tech B.V.
EL-FLOW Prestige 9.17.084 28
3.9.2 Basic measurement and control parameters
The list below provides the most basic parameters for digital communication with the instrument.
The parameters below are most easily accessible via FlowPlot or FlowView software or any of the Bronkhorst
readout/control units (BRIGHT, E-8000).
Measured Value (Measure)
Type Access Range FlowDDE FLOW-BUS Modbus
Unsigned int R 0…41942
(65535*)
8 1/0 0x0020/33
The ‘ 8 Measured Value’ indicates the amount of mass flow metered by the instrument. The signal of 0…100% is presented in a range
of 0…32000. The maximum measured value output is 131.07%, which is 41942. A floating point variable of the measured value,
‘ 205 Fmeasure’, is also available in the capacity and capacity unit for which the instrument has been set, see section 4.2.1.
*In case the instrument is prepared for bi-directional measurement, the negative signals with an output range of
-73.73...-0.003% are presented in a range of 41943…65535 (so value 65535 represents -0.003%), whereas the
positive signals 0…131.07% are still presented in the range 0…41942. (In FlowDDE the numbers are converted to
negative values automatically).
Setpoint
Type Access Range FlowDDE FLOW-BUS Modbus
Unsigned int RW 0…32000 9 1/1 0x0021/34
The ‘ 9 Setpoint’ is used to set the required mass flow rate for the controller. The signals have the same range as the ‘ 8 Measured
Value’, only the setpoint is limited between 0 and 100% (0…32000). A floating point variable of the setpoint, ‘ 206 Fsetpoint’, is also
available in the capacity and capacity unit for which the instrument has been set, see section 4.2.1.
3.9.3 Basic identification parameters
User Tag
Type Access Range FlowDDE FLOW-BUS Modbus
Unsigned char[16] RW - 115 113/6 0xF130…0xF136/ 61745…61751
The ‘ 115 User Tag’ parameter allows the user to give the instrument a custom tag name, with a maximum of 16 characters.
Customer Model
Type Access Range FlowDDE FLOW-BUS Modbus
Unsigned char[16] RW - 93 113/4 0xF120…0xF127/ 61729…61736
This parameter is used to add extra information to the model number information, such as a customer-specific model number.
Serial Number
Type Access Range FlowDDE FLOW-BUS Modbus
Unsigned char[20] R - 92 113/3 0xF118…0xF11F/ 61721…61728
This parameter consists of a max. 20-byte string with instrument serial number for identification, e.g.: ‘M1111111A’.
BHT Model Number
Type Access Range FlowDDE FLOW-BUS Modbus
Unsigned char[27] RW - 91 113/2 0xF111…0xF117/ 61713…61719
This parameter shows the Bronkhorst instrument model type information.