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Electromagnetic Flowmeter BFM921
Temperature
Unit
Interval
Datalogger
Memory usage
Clear
4.2.3
Input/output interface
Following table lists only brief explanation of configuration of inputs and outputs. For more detailed guide
on inputs and outputs configuration see chapter Inputs and outputs configuration.
Level 1
Level 2
Active bus
RS485 address
Baudrate
PC interface
Mode
Modbus parity
Modbus address Modbus address can be selected from 1 to 247.
Mode
Fixed current
Qi 20mA
Current
output
Loop test
Error current
Mode
Frequency
Fixed frequency
output
Qf 1kHz
Mode
Pulse
output
Pulse width
20
Function enables user to set temperature units.
Available units are:
Function enables user to set sample interval for internal
datalogger between 5 and 240 minutes, or turn
datalogger off.
Function displays memory usage in %. Datalogger
capacity is over 100 000 samples.
Function enables user to clear datalogger memory.
Table 5 : Settings for measurement
Setup menu/I/O interface
Active bus can be selected between RS232 and RS485 protocols.
RS485 address can be assigned from 0 to 31.
Baudrate can be selected from 1200 to 115200.
Output mode can be selected from normal, Modbus RTU and Modbus
ASCII
Modbus parity mode can be selected from none, even or odd parity.
Output mode can be selected from Off, Positive flow, Negative flow,
Absolute flow, Bipolar flow and Fixed.
Item allows setting current amplitude in the current mode f) (Fixed). The
range is from 4 mA to 20 mA.
Item allows setting the Qi constant. Qi represents a flowrate for a
current of 20 mA and can be set
independently to the nominal diameter of the sensor.
Item allows enable/disable the current loop test. The flowmeter will
detect a fault (Error 08 – Current open)
if the test is enabled and current loop is not connected.
Item allows setting current loop error current from 3 mA to 3.75 mA or
from 21 mA to 24 mA. Current
output is switched to selected value in case of present error state in flow
meter.
Output mode can be selected from Off, Positive flow, Negative flow,
Absolute flow, On positive, On negative, On In, On out, Dose on, Dose
off, On<F2, On>F2 and Fixed.
Item allows setting frequency in the frequency mode m) (Fixed). The
range is between 10 and 12000 Hz.
Item allows setting the Qf constant. Qf represents the flowrate for the
frequency 1000Hz and can be set
independently to the nominal diameter of the sensor.
Output mode can be selected from Off, Positive flow, Negative flow,
Absolute flow, On positive, On negative, On In, On out, Dose on, Dose
off, On<F1, On>F1 and Fixed.
Item allows setting pulse width in ms. Available widths are 2.5, 5, 10, 25,
50, 100, 250 and 500 ms.
°C
°F
K
Description
BASI
Operation manual
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