BRONKHORST®
Page 30
EL-FLOW
Base
Series Mass Flow Controllers
9.17.061
3.9.2 Basic Parameters
Measure
Type
Access
Range
FlowDDE
FlowBus
ModBus
Unsigned int
R
0…41942 8
1/0
0x0020/33
The measured value indicates the amount of mass flow metered by the instrument.
The signal of 0...100% will be presented in a range of 0...32000. The maximum signal to be expected is
131.07 %, which is: 41942.
Setpoint
Type
Access
Range
FlowDDE
FlowBus
ModBus
Unsigned int
RW
0…41942 9
1/1
0x0021/34
Setpoint is used to set the wanted amount of mass flow.
Signals are in the same range as the measured value, only setpoint is limited between 0 and 100 %.
Control Mode
Type
Access
Range
FlowDDE
FlowBus ModBus
Unsigned int
RW
0…18
12
1/4
0x0024/37
The Controller mode is used to select different functions of the instrument. The following modes are
available:
Value Mode
Instrument action
Setpoint source
0
DIGITAL_INPUT
Controlling
RS232/RS485
1
ANALOG_INPUT
Controlling
Analog input
3
VALVE_CLOSE
Valve closed
4
CONTROLLER_IDLE
Idle
5
TEST_MODE
Test mode enabled
7
SETPOINT_100
Controlling @100%
Fixed 100%
8
VALVE_OPEN
Valve full opened
9
CALIBRATION_MODE
Calibration mode enabled
12
SETPOINT_0
Controlling @0%
Fixed 0%
18
RS232_INPUT
Controlling
RS232 FlowBus
After power-up the control mode will always be set to DIGITAL_INPUT or ANALOG_INPUT, depending on
customer’s requirement. Check chapter 4.1.6, Changing Default Control Mode, to change the start-up
mode.
