Bronkhorst EL-FLOW Prestige - Manual (Page 33)

Bronkhorst High-Tech B.V.
EL-FLOW Prestige 33 9.17.084
4.2 Advanced parameters and properties
4.2.1 Advanced measurement and control parameters
Measured Value (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 variable of the ‘ 8 Measured Value’. The ‘ 205 Fmeasure’ parameter shows the measured value in the capacity and
capacity unit for which the instrument has been set. The ‘ 205 Fmeasure’ parameter is dependent of ‘ 129 Capacity Unit’ and ‘ 22 Sensor
Type’.
Setpoint (Fsetpoint)
Type Access Range FlowDDE FLOW-BUS Modbus
Float RW 0…3.4E+38 206 33/1 0xA119…0xA11A/ 41241…41242
Floating point variable of the ‘ 9 Setpoint’. The ‘ 206 Fsetpoint’ parameter shows the setpoint in the capacity and capacity unit for
which the instrument has been set. The ‘ 206 Fsetpoint’ parameter is dependent of ‘ 129 Capacity Unit’ and ‘ 22 Sensor Type’.
Valve Output
Type Access Range FlowDDE FLOW-BUS Modbus
Unsigned long RW 0…
16777215
55 114/1 0x001F/32
This parameter is the digital steering signal for driving the control valve, where 0…16777215 corresponds with 0…100%.
Analog Input
Type Access Range FlowDDE FLOW-BUS Modbus
Unsigned int R 0…65535 11 1/3 0x0023/36
Depending on the analog mode, 0…5 Vdc, 0…10 Vdc, 0…20 mA or 4…20 mA is converted to a number in the range 0…32000. The
digitized ‘ 11 Analog Input’ is in the same range as ‘ 8 Measured Value’ (0…32000 corresponds to 0…100%). This parameter can be used
as setpoint or slave factor when the instrument is used as ‘analog slave’ or ‘FLOW-BUS analog slave’, see ‘ 12 Control Mode’.
4.2.2 Special instrument parameters
All parameters described in this section have influence on the behavior of the EL-FLOW Prestige. Please be aware
that wrong settings can disorder the output. To avoid unintentional changes, some parameters are locked (shown by
the symbol). To unlock parameters set parameter ‘ 7 Init Reset’ to ‘Unlocked’.
Init Reset
Type Access Range FlowDDE FLOW-BUS Modbus
Unsigned char RW 82/64 7 0/10 0x000A/11
The ‘ 7 Init Reset’ parameter is used to unlock secured parameters for writing (see the symbol). This parameter can be set to the
following values:
Value 82: Locked mode, secured parameters are read-only
Value 64: Unlocked mode, secured parameters are writeable and readable
This parameter is always set to ‘Locked’ (value 82) at power-up.