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3
Basic Operation
3.1 General
An X-Flow™ instrument can be operated by means of:
• Analog interface (0...5Vdc/4...20mA)
• Digital RS232 Flowbus® interface (connected to COM-port by means of T cable (7.03.366) on 38400
Baud)
• Digital RS485 Modbus® interface.
Operation via analog or digital interface can be performed at the same time. A special parameter called
"control mode" indicates to which setpoint source the controller should respond.
3.2 Analog operation
In analog operation following signals are available:
• Measured value (analog output)
• Setpoint (analog input)
The type of installed analog interface (0-5V, 4-20mA) can be found in the model key of the instrument.
Refer to section 1.5.2.
Setpoints below 2% of the full scale will be interpreted as 0% setpoint.
When operating the instrument through the analog interface it is possible to connect the
instrument simultaneously to RS232 or Modbus®/RS485 for reading/changing parameters
(e.g. controller response or other fluid selection).
Page 14
Instruction manual Parker X-Flow
FM-1407 Rev - 11/2021
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