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Operation
28
515 BR03 - 15 August 2021
Local Mode
The desired process control output
(P-CTRL %) is manually set via the front
panel or serial communications.
The output signal is used to drive the
proportional control valve to the desired
position.
The control of the process line is
independent of the main flow.
Loop Mode
The desired process flowrate set point
(P-FLOW SP) is set via the front panel or
serial communications.
The PI controlled output signal is used to
maintain the desired process flowrate via the
proportional control valve.
The control of the process line is
independent of the main flow.
Tune Mode
- CAL MODE ONLY
This mode is only accessed from within
calibration mode and allows the operator to
view a concise list of key paramaters and
gain immediate feed back. The Proportional
Band (P-BAND) and Integral Time (I-
TIME) are entered to tune the system.
For details on this method see below:
”Tuning the Control Loop”
.
The control and tuning of the process line in
this mode is independent of the main flow.
Main Flow
Proportional
Control Valve
Frequency
Input 1
Process Flow
Flowmeters
Analog
Output
Frequency
Input 2
Main Flow
Proportional
Control Valve
Frequency
Input 1
Process Flow
Flowmeters
Analog
Output
Frequency
Input 2
Proportional
Control Valve
Process Flow
Flowmeter
Analog
Output
Frequency
Input 2
Содержание 515 BR03
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